dnc 70 ps (g)

DNC 70 PS (G)User Guide

CYBELEC SA Tel. ++ 41 24 447 02 00RUE DES UTTINS 27 Fax ++ 41 24 447 02 01CH - 1400 YVERDON-LES-BAINS E-Mail: [email protected]

V-DOC-70PS-EN

Information in this document is subject to change without notice, and does not representa commitment on the part of CYBELEC SA.

The software described in this document is furnished under a license agreement or nondisclosureagreement. The software may be used or copied only in accordance with the terms of the agreement. It isagainst the law to copy the software on any medium except as specifically allowed in the license ornondisclosure agreement.

Copyright CYBELEC SA. 1991

All rights reserved.

Important:

This notice explains normal and standard programming operations for the numerical control.In view of the fact that numerical controls can be equipped with configurable functions by the pressmanufacturer for his own specific purposes, please refer to the manufacturer-supplied complementaryinstructions regarding the programming of these functions.

Autocad is a registered trade mark of Autodesk Inc..

CYBELEC is a registred trademark of CYBELEC SA.

Ethernet is a registered trade mark of Xerox Corporation.

IBM , PC/AT , PC Network , Token Ring Networkare registered trade marks of the International Business Machines Corporation.

MS-DOS is a registered trade mark of Microsoft Corporation.

MS-Windows is a registered trade mark of Microsoft Corporation.

Novell Netware is a registered trade mark of Novell, Incorporated.

Windows NT is a registered trade mark of Microsoft Corporation.

SAFETY AND MAINTENANCE INSTRUCTIONS PAGE I

SAFETY AND MAINTENANCE INSTRUCTIONS

! The operator must be trained for working with themachine on which the numerical control is installed.

! Improper use of the numerical control can causeheavy damage on equipment and/or injuries topeople.

! Modification of machine parameters can causeimportant material damage or lead to irregularproduct quality.

! The rear panel may only be removed by a qualifiedtechnician (danger of electrocution).

! Do not expose the numerical control to excessivehumidity so as to avoid any risk of electrocution andany deterioration of the equipment.

! Make sure the numerical control is disconnectedfrom the mains power before carrying out anycleaning. Do not use liquids based on alcohol orammoniac.

! In case of malfunction of the numerical control, call atechnician.

! Do not expose the numerical control to direct sunrays or any other heat source.

! Do not place the numerical control in theneighbourhood of magnetic equipment such astransformers, motors or devices which generateinterference (welding machines, etc.)

! Replace fan filters at regular intervals so as to avoidoverheating.

PAGE II USER GUIDE DNC 70 PS (G)

This page has been left blank intentionally.

LICENSE AGREEMENT PAGE III

LICENSE AGREEMENT FOR CYBELECSOFTWARE

GENERAL COPYRIGHT

The CYBELEC software is protected by Copyright, and all the copying rights are reserved.

The CYBELEC software may only be installed and used in authorized equipments (PC or DNC).

The user manuals are also covered by copyright, and all rights to use and to copy are reserved.

This document may not, in whole or in part, be copied, photocopied, reproduced, translated or reducedwithout prior consent, in writing, from CYBELEC.

SPECIAL DISKETTE COPYRIGHT

The legal users of this software product are authorized only to copy the contents of the diskette into thememory of the computer to run the program, and to make one backup copy of the original diskette forsafety purposes in case of loss of the original program.

Unauthorized copying, duplicating, selling or otherwise distributing this product is a violation of the law.

SPECIAL EPROM COPYRIGHT

The CYBELEC DNC and CNC units in which the original software made by CYBELEC has beenreplaced by a copy not made by CYBELEC, and without written authorization of CYBELEC, willimmediately lose their warranty.

WARRANTY

CYBELEC does not warrant that its software products will function properly in every computer andprogramming environment.

The limitations of use of a software product and its technical specifications are decided by CYBELEConly; CYBELEC solely is entitled to decide upon conformity and performance of a given software.

The CYBELEC software does not compensate for incompatibilities in operating system revisions orversions.

Running the CYBELEC software under various revisions or versions, or switching between differentversions or revisions may result in loss or alteration of data.

PAGE IV LICENSE AGREEMENT

SOFTWARE UPDATE SERVICE

Purchase of the CYBELEC software entitles the user, during one year, to delivery of software updates ofthe "correction" type.

During the use of a revised or corrected version of the software it may occur that data (program,parameters, etc.) is lost, or that the equipment or its connections need to be modified; these effects are notalways foreseeable and do not engage CYBELEC's responsibility.

TERMINATION

This agreement shall automatically terminate upon any act of bankruptcy by or against licensee, upon anyassignment for the benefit of creditors of the licensee, upon any attachment execution of judgement orprocess against licensee or its assets that substantially inhibits its ability to do business, or upondissolution of licensee.

CYBELEC has the right to terminate this agreement immediately, should the licensee violate theaforementioned conditions.

Within 30 days of termination of this agreement for any reason, licensee shall at his option, either:

! return to CYBELEC or authorized dealer all existent copies of such software and related materials, or

! furnish to CYBELEC evidence satisfactory that the original and all copies of the software, in wholeand in any form, have been destroyed.

LIMITATION OF LIABILITY

The foregoing warranty is instead of all other warranties, expressed or implied.

Licensee further agrees that CYBELEC shall not be liable for any lost profits, lost savings, loss of use, orother incidental or consequential damages arising from the use or inability to use the software, or for anyclaim or demand against licensee by any other party.

In no event shall CYBELEC be liable for consequential damages, even if CYBELEC has been advised ofthe possibility of such damages.

CYBELEC does not warrant that the functions contained in the software will meet the licensee'srequirement or that the operation of the software will be totally error free.

Should the software prove defective, the licensee (and not CYBELEC or an authorized dealer orrepresentative) will assume the entire cost of all necessary service, repair or correction.

CYBELEC warrants the diskettes, EPROMS or other magnetic support or cassettes on which theprograms are supplied to be free of defects in material and workmanship under normal use for a period of90 days from the date of shipment to the licensee as evidenced by a copy of the packing slip.

LICENSE AGREEMENT PAGE V

LIMITATION OF REMEDIES

CYBELEC's entire liability and the licensee's exclusive remedy shall be as follows:

The replacement of any diskettes or EPROMS or magnetic support media or cassettes not meetingCYBELEC's limited warranty and which materials are returned to CYBELEC or an authorizedCYBELEC representative with a copy of the packing slip, or

If CYBELEC or its representative is unable to deliver replacement diskettes, magnetic support media,EPROM or cassettes which are free of defects in materials or workmanship, the licensee may terminatethis agreement under the terms and conditions herein mentioned, and the purchaser's money will berefunded.

GENERAL

The licensee acknowledges that he has read this agreement, understands it and agrees to be bound by itsterms and conditions.

The licensee agrees to hold CYBELEC harmless on all liability associated with licensee's breach of thisagreement including, but not limited to, all reasonable attorney's fees and court costs, if any.

This license agreement shall be governed by Swiss law; place of jurisdiction is Lausanne, Switzerland.

MAINTENANCE

CYBELEC will provide one year of software maintenance.The extent of maintenance, and response timefor furnishing same, shall be at the sole discretion of CYBELEC.Maintenance shall normally includecorrection of errors in code, correction of errors in supporting documentation, update versions of thecovered software which may be released by CYBELEC during the maintenance period.

In no event shall CYBELEC be obliged to provide technical support in attempting to resolve problems ordifficulties resulting from licensee's modification of the licensed software; any such modification bylicensee is entirely at licensee's own risk.

PAGE VI LICENSE AGREEMENT


22.10.92 V.2.0a

NOT70EN.DOC CONTENTS PAGE 1

CONTENTS

SAFETY AND MAINTENANCE INSTRUCTIONS........................................................................... I

LICENSE AGREEMENT FOR CYBELEC SOFTWARE.................................................................. III

DESCRIPTION OF THE CONFIGURABLE NUMERICAL CONTROL DNC 70 PS........................ 7

GENERAL INFORMATION................................................................................................. 7

TECHNICAL CHARACTERISTICS .................................................................................... 9

Bending depth (Y1 and Y2 axes) 9

Backgauge (X axis) 9

Backgauge (R, Z1, Z2 axes) 9

Bending angle 9

Auxiliary functions 10

Hardware 11

Dimensions 11

ACCESSORIES .................................................................................................................. 12

PRESENTATION OF THE DNC 70................................................................................................. 13

PHYSICAL AND LOGICAL ORGANIZATION..................................................................... 13

THE MEMORIES ................................................................................................................ 14

THE USER INTERFACE .................................................................................................... 16

The screen 16

The keyboard 16

SWITCHING ON THE DNC 70........................................................................................... 20

The DNC key and its key access 20

PRESENTATION OF THE SCREEN PAGES .................................................................... 22

Cursor accessible fields 22

THE MAIN MENU ............................................................................................................................ 23

SUMMARY EXPLICATIONS OF THE MAIN MENU OPTIONS ......................................... 24

PRODUCT PROGRAMMING AND MANAGEMENT ...................................................................... 25

PRODUCT PROGRAMMING ............................................................................................. 25

CONTENTS

Programming on the PRODUCT STATUS page 26

PRODUCT STATUS page: Explication of the top screen fields 27

PRODUCT STATUS page : Explication of the table columns 29

PRODUCT STATUS page : Example of programming a simpleproduct 31

DEFINITION OF THE BENDING ORDER ..........................................................................33

PRODUCT BEND page; LEGS: Explication of the top screen fields 33

PRODUCT BEND page; LEGS : Explication of the table columns 34

PRODUCT BEND page; LEGS : Example of simulation of a simple product 35

THE SEQUENCE PAGE.....................................................................................................41

SEQUENCE page : Explication of the top screen fields 42

SEQUENCE page : Explication of the screen columns 43

Programming on the SEQUENCE page 44

SEQUENCE page : Simple example of programming 44

PRODUCT MANAGEMENT ............................................................................................................49

Consulting the general list of products ................................................................................49

Consulting the list of products with selection criteria...........................................................50

Calling a product from the INTERNAL memory to the work memory .................................51

Saving a product in the INTERNAL memory.......................................................................51

Deleting a product in the work memory...............................................................................52

Deleting a product in the INTERNAL memory ....................................................................52

Deleting all the products in the INTERNAL memory...........................................................52

TOOL PROGRAMMING AND MANAGEMENT...............................................................................53

Consulting the tools.............................................................................................................53

Consulting the list of punches 53

Consulting the list of dies 54

Consulting the list of punch / die pairs 54

PUNCH / DIE PROGRAMMING .........................................................................................55

General explications 55

Programming a punch 56

Creating a punch by modifying an existing one 56

Modification and saving of an existing punch 57

Deleting a punch 57

Programming a die 57

Creating a die by modifying an existing one 58

Modification and saving of an existing die 58

CONTENTS PAGE 3

Deleting a die 58

Programming a punch / die pair 58

TRANSFER ..................................................................................................................................... 59

DNC <-> SRAM CARD TRANSFER page.......................................................................... 59

DNC <-> PC TRANSFER page .......................................................................................... 60

TRANSMISSION TESTS.................................................................................................... 61

Active transmission test 61

Passive transmission test 62

THE MACHINE WORKING MODES............................................................................................... 65

Adjustment mode 65

Sensitive mode 66

Automatic mode 66

ANNEXES........................................................................................................................................ 67

The INITIALIZATION page ................................................................................................. 67

The tool reference value ..................................................................................................... 69

Y1 and Y2 counters greatly different 71

Y1 and Y2 counters identical, but different from REF Y 71

Reference correction for the product 71

The contact point (CP) or Pinch point 72

Definition: 72

The 4 to 6 axes ................................................................................................................... 73

X-R safety factors 73

Two examples of specific positioning at the X-R safety point 75

X1-X2 safety factor 76

Z1-Z2 safety factor 76

Programming the axes datum............................................................................................. 76

Calibration........................................................................................................................... 77

Ideal curve .......................................................................................................................... 78

Cycle without bend.............................................................................................................. 79

Punching ............................................................................................................................. 80

Punching using punching tools 80

Bottoming 80

Angle correction .................................................................................................................. 81

CORRECTION page : Explication of the top screen fields 82

CONTENTS

CORRECTION page : Explication of the table columns 82

Access to the production management pages....................................................................83

Consulting the production page 83

PRODUCTION page : Explication of the fields 84

Working time 85

Loading and saving an order 85

Consulting the orders 85

Deleting an order 86

Introducing alphanumerical characters into the fields 86

SAFETY AND INTERACTIVE MESSAGES........................................................................87

The interactive messages 87

THE PRINTSCREEN FUNCTION ......................................................................................90

Print screen to the printer (or ascii file) ...............................................................................90

To print from the DNC 70 90

THE DNC 70 GRAPHIC...................................................................................................................91

General remarks .................................................................................................................91

PROGRAMMATION OF A GRAPHIC PRODUCT PAGE................................................................93

Example of complete simulation 98

Example of partial simulation 101

Reduced simulation 103

Programmation of bends using N/Lalpha = 1 104

CRITERIA FOR BENDING CALCULATIONS 104

3 possibilities are offered 106

Error messages on graphic product page 107

INDEX ..............................................................................................................................................109

FOREWORD

FOREWORD

This manual will familiarize you with the programming of the DNC 70. It supplies the necessaryinformation to allow you to program products and tools.You will also learn how to search for, copy, modify and save these data.The DNC 70PSG is very similar to the DNC 70 PS. For this reason you will find at the end of this manuala chapter called "ANNEX DNC 70 GRAPHIC" in which all the specifications and differences will beexplained.

FOREWORD


DESCRIPTION OF THE DNC 70 PS PAGE 7

DESCRIPTION OF THE CONFIGURABLENUMERICAL CONTROL DNC 70 PS

GENERAL INFORMATION

- Configurable numerical control for 2 to 6 axes

- 2 synchronized numerical axes for controlling the beam (left Y1 and right Y2 jacks).

- 1 to 4 numerical axes to control the backgauge.Choice of configuration:

XX, RX, R, ZX1, X2, R, ZX1, X2, Z1, Z2X, R, Z1, Z2.

- Axis drive

• beam: proportional valves or servovalves (Moog, Bosch, Schneider, Hoerbiger, etc.)

• backgauge: AC or DC motor with or without tachometer.

- CRT 9 inch black and white high resolution screen.Two character sizes.

- Multi-page display by menu or direct access.

- Multilingual conversational programming. In each DNC, 12 languages are permanentlyavailable for the operator.

- Direct programming of the angle and bending corrections with calculation of the bendingdepth as a function of the material and tooling.

- Programming of the bent product according to the L-alpha method with calculation of thebackgauge positions and determination of the unfolded length according to DIN 6935standard.

- Alphanumerical programming of the code number and production pages.

- "Printscreen" function for printing the contents of each screen page (via serial line).

- Automatic conversion:Inch / mm; USTon / MetricTon; PSIx1000 / Kg/cm2

- Automatic compensation of sheet metal thickness variations (can only be used for thicksheets).

- Internal DNC memory on non-volatile SRAM with a capacity of 32 KBytes which allows tostore in the DNC:

• approx. 300 sequences

• 20 punch / die pairs

• over 100 machine parameters.

USER GUIDE DNC 70 PS (G)

- Unlimited storage of products and tools by using plug-in SRAM boards, 32 Kb credit cardformat.Capacity: 32 Kbytes per board.

• Product N° : 3 numbers• Code N° : 24 numbers or letters• Sequence N° : 2 numbers• Sequence repetitions : 2 numbers

- Machine parameters in 12 languages: Limitation of axes displacement, safety, adjustmentof servomechanisms, etc.

- Beam positioning in high precision closed loop with control of speed, pressure andparallelism.

- For each digital axis:

• High performance closed loop regulation with or without insensibility zone.

• Counting frequency: 150 KHz

• Displacement speed, acceleration, deceleration, regulation gain, PID, safeties andlimit switches programmable numerically in the machine parameters.

• Automatic initialization procedure.

- Memorization of the back gauge positions in the case of a power failure.

- Corrections per product and per sequence for the Y1, Y2, and X1, X2 axes.

- RS232 series interface integrated in the DNC for "ON LINE" link with IBM_PC / AT / PS2(on option RS 422 interface).

- 4 servo-amplifiers integrated in the DNC to command 2 servo-valves (max. 300 mA) orproportional valves (± 10 VDC), a pressure regulation valve (28 VDC; 1 A) and a crowningcommand proportional valve (28 VDC; 1 A).


TECHNICAL CHARACTERISTICS

BENDING DEPTH (Y1 AND Y2 AXES)

Positioning range : 0 - 900,000 mm

Programmable resolution : 0,01 or 0,005 mm

Reproducibility : 0,002 mm

Ascent / descent beam speed : 150 mm/s

Bending speed : 0 - 10 mm/s (0-20 mm/s)

Corrections per product and per sequence : 0 - ±99,99 mm

BACKGAUGE (X AXIS)


Programmable resolution : 0,1 or 0,01 mm

Reproducibility : 0,02 mm

Displacement speed : 500 mm/s

Corrections per product and per sequence : 0 - ±99,99 mm

BACKGAUGE (R, Z1, Z2 AXES)


Programmable resolution : 1 or 0,1 mm

Displacement speed : 500 mm/s

BENDING ANGLE

Positioning range : die angle to 179,9°

Corrections per angle and per sequence : 0 - ±99,99°


AUXILIARY FUNCTIONS

a) Calculated by the DNC:

• Change to bending speed point

• Beam safety point

• Contact point

• Bending force

• Crowning as a function of the bending force

• Bottoming

b) Programmable by the operator:

• Beam top dead center

• Beam desynchronization for conical bends

• Bottoming

• Dwell time

• Backgauge disengagement

• Sequence repetition

• Automatic follow-on of products

• Quantity of products made and to be made.

c) Unattributed functions

F1 : Analogical function 250 values with bi-directional positioning(backgauge height, bending help, etc)

F2 : same as F1

F3 : same as F1

F4 : digital (BCD coded output)

F5 : same as F4

F6 : same as F4


HARDWARE

• Power supply : +24VDC/1A ± 15 VDC/50 mAor220 VAC +10% -15% / 50 Hz(separated block type ADC 60 orADC 350)

• Power consumption : approx. 25 VA

• Work room temperature : 0 - 40°C

• Storage room temperature : -30 - +70°C

• Relative humidity : 5 - 75%(short time 95%).

• Vibrations : < 3g effective(20 à 30'000 Hz).

• Shocks : < 5g during 10 ms.

DIMENSIONS

Width : 480 mm

Height : 270 mm

Depth : 290 mm

Fixed by support arm

The DNC 70 series of numerical controls comply with the internationalstandards CEI 801-2-3-4.

These standards determine the immunity of electronic apparatus under severeindustrial ambient conditions (severity level: 1 to 4).

CEI 801-2 Prescriptions relative to electrostatic discharges.

CEI 801-3 Prescriptions relative to electromagnetic radiation fields.

CEI 801-4 Prescriptions relative to rapid transient electrical salvos.


ACCESSORIES

CYBACK Software for storage in PCAllows the storage and recall of data (products, tools, machineparameters) for the DNC 7000, DNC 70, and DNC 30 CNCs in a PC viathe serial line.Up to 10 different CNCs can be selected.Ask for our "Product information" about CYBACK.

BIP CASING Storage of SRAM board contents in PCThis accessory allows storage in a PC of data from a DNC 70 equippedwith a "SRAM board" unit, and this without the installation of a serial linebetween the PC and the DNC. The BIP casing contains a SRAM boardreader / recorder and is connected directly to the PC, thus allowing totransfer the contents of a SRAM board from the DNC.Ask for our brochure for this option.

PC90 Software for 2D and 3D programming on PCThis software allows to program on a PC in 2 and 3 dimensions theproducts to be realized on the CNC.This software executes the simulation and graphic display of the bendingorder taking into account the characteristics of the machine, the tools andthe material.

Developed specially for our DNC 90 and DNC 9000 CNCs, an option(LINK7000) allows to also transfer products to the DNC 7000, DNC 70and DNC 30 CNCs.

LINK7000 Software for transfer PC90 to DNC 70PS.This option allows to transfer products programmed and simulated on the3D PC90 software to the DNC 70PS CNC by the serial line.The PC90 software and the LINK7000 option are the ideal complimentfor the DNC 70PS.

PRESENTATION OF THE DNC 70 PAGE 13

PRESENTATION OF THE DNC 70

PHYSICAL AND LOGICAL ORGANIZATION

The following diagram is a schematic representation of the physical andlogical organization of the DNC 70:


THE MEMORIES

The different memories of the DNC 70 may be represented schematically asfollows:

The DNC 70 is equipped as standard with a ROM memory containing theDNC 70 program and a RAM memory which allows the programming andstoring of products, tools and machine parameters. The RAM is divided intoseveral zones each having a different use.

Work memory (buffer memory)

This is a static RAM used for programming, modifying and executingproducts.It is a temporary memory whose contents are deleted whenever anotherproduct is called for.

The contents of this memory is conserved if the DNC power supply is cut,even if it has not been previously stored in the internal memory.

DNC internal memory (sometimes called internal cassette)

This fixed internal memory, of the static RAM type maintained by a lithiumbattery, contains the products, tools, axes positions, numbers concerning theproduction and machine parameters.No programming or modification are done directly in this memory.


SRAM memory

Removable external memory in credit card format. Like the DNC internalmemory, this memory can store information concerning the products,production, punches, dies and machine parameters. Its capacity enables tostore either all the DNC products, or the machine parameters, the tools andthe production.

The card is removable. It is used as an archive memory. The data contained inthe DNC memory can only be transferred globally to the card and vice versa.Several cards can be used to store the products or machine parameters ortools selectively for archives.

It is strongly recommended to store on a special card and conserve separatelyin a safe place the machine parameters such as they are programmed ondelivery of the machine (eventually keep a written copy). See page 59.


THE USER INTERFACE

THE SCREEN

The screen displays the products, tools and machine parameters as well as allother useful information for programming and machine work.

The keys situated on the front of the DNC 70, are used for selecting thescreen pages and introducing data.

A cursor indicates where the user can intervene.

THE KEYBOARD

The keyboard is divided into six zones:

a) Numerical keyboardb) Screen page selection keysc) Working mode zoned) The commandse) The cursor keysf) "MANUAL" zone

a) Numerical keyboard:

The numerical keys as well as the . and keys are used tointroduce numbers or values into the different fields.

b) The screen page selection keys

MENU keyGives access to the MAIN MENU page.

PRODUCT LIST keyDouble function key.Pressing this key once displays the list ofproducts in the DNC memory.Pressing the key again displays the search forproducts by criteria page.

PRODUCT keyTriple function key.Pressing this key once displays the Anglelength (L-Alpha) values.Pressing a second time displays the bendingorder with their respective legs.Pressing a third time displays the bendingvalues which are calculated as a function of thevalues introduced on the previous page.


SEQUENCE keyTriple function key.Pressing the key once displays the first page ofvalues in large characters.Pressing a second time displays the secondpage of values in large characters.Pressing a third time displays all the values andfunctions of the current sequence.

CORRECTION keyThis key displays the correction page whichallows to make corrections to the currentsequence, as well as to the entire product.

c) The working modes

PROGRAMMING modeAllows to introduce, modify and read data aswell as to store, search for and transferprograms.

MANUAL modeAuthorizes axis movement and auxiliary

functions using the keys.

SEMI-AUTOMATIC modeAllows a machine cycle with the currentsequence values without automatic sequencechange.This mode is used for adjustments whenrealizing the first product, as well as forproducts with only one bend.

The sequence change is made using the

keys.

NB: The product counter Q does not functionin this mode.

AUTOMATIC modeNormal mode for product production.The DNC automatically changes sequence aftereach bend.Changing directly from "programming" modeautomatically forces the first sequence of theprogram.Changing from "programming " mode to "semi-automatic" mode and then to "automatic"mode, conserves the current sequence forexecution.This allows to take up again a product inproduction without having to make "empty"cycles.


d) The commands

DELETE keyAllows to delete a sequence or a program whenthe cursor is placed on the PRODUCT or Nfields.This key may be inactive in certain situations,depending on the position of the front panelkey.Only functions in PROGRAMMING mode.

CLEAR keyThis key allows to delete data indicated by thecursor.Pressing this key twice, on most pages, deletesall the data on the page.

SEARCH or CALCULATE keyAccording to the cursor position allows:- to search for a product- to search for a sequence- to search for a tool- to search for a screen page- to start a product feasibility calculation- to transform L-alpha values into machine

values- to calculate the unfolded length of the sheet- to execute a transferOnly functions in PROGRAMMING mode andindependently of the front key position.

STORE (memorization) keyDepending on the cursor position, allows tostore the current program in the DNC internalmemory, or create (insert) a new sequence inthe middle of an existing program, or copy(teach) the value of an axis positioned manuallyin the current sequence.This key is only valid in programming(memorization and insertion) mode and inmanual (teach) mode. The position of the keydetermines the access to the DNC internalmemory.


e) The cursor keys

SEQUENCE FORWARDS / PAGEFORWARDS keyThis key allows to scroll pages of the sametype. Also allows to pass to the next page whena series of information occupies several pages.

Eg.: program sequencepunch-die pagesproduction pagesparameter pages

In PROGRAMMING mode also allows tocreate an identical sequence (copy function) tothe previous one as long as this is the lastsequence of the program.The incorporated LED indicates whether thesequence is the last of the program.

PAGE BACKWARDS keyAllows to scroll backwards through pages ofthe same type.Functions in all modes except automatic mode.

Cursor upwards, to the next accessible field.

Cursor downwards, to next accessible field.

f) "MANUAL" zone

START keyCommands:

- The displacement of the axis and auxiliaryfunctions.During movement the LED lights up(except for the beam)

- An indexation at the beam (on optiondepending on the configuration on otheraxes) when this key is first pressed afterswitching on the DNC.

To indicate that an index is being taken theLED remains constantly alight, until theindexes are received. Indexes can only be taken

in or modes.

STOP keyDepending on the working mode chosen, stopsthe axes or auxiliary functions, or stops thecalculation being executed.


SWITCHING ON THE DNC 70

The DNC can be switched on with the key in any position, the choice is left tothe user depending on the limit of access to be fixed.

However the DNC is usually switched on with the key in position 0, 1 or 2.

If the DNC is switched on with the key in position 3, the DNC 70INITIALIZATION page is displayed. Simply turn the key to position 2, 1 or0 to return to the main menu.

If the DNC 70 INITIALIZATION page remains displayed regardless of thekey position, refer to chapter "The Initialization Page" page 67.

THE DNC KEY AND ITS KEY ACCESS

3 keys are available:

Key n°1 gives access to levels 0 and 1Key n°2 gives access to levels 0, 1 and 2Key n°3 gives access to levels 0, 1, 2 and 3

LEVEL 0 gives access

! to the programming of the work memory, with the possibility tocreate a product using tools already programmed and available in thepunch-die memory.

! to the internal memory to (only) recall an existing product, with thepossibility to modify it before execution.

! to read all the existing data in the DNC using the MENU key.

! to all the machine functions except transfer DNC-PC.

This level leaves the operator the possibility to create a product, recall aproduct for execution with modification if necessary, but not the possibility tomodify or delete vital or stored data. All the existing contents cannot bechanged.


! to level 0

! to the possibility to store a product in the internal memory.

! to the possibility to delete one or all the products in the internalmemory,

! to transfer PC-DNC and DNC-PC.



! to levels 0 and 1

! to the programming (and modification) of p/d tools

! to the programming of the 9 "production" pages

! to the programming (and modification) of the axes datum


! to levels 0, 1 and 2

! to the programming of the machine parameters

! to the possibility to initialize the DNC totally or partially.

To avoid any accidental deletion of important data (Eg. machine parameters),it is preferable to leave the key in position 1 for programming products and inposition 2 for programming tools.

Before beginning the chapter on programming products and tools, here are afew explications about how to circulate in the different pages.

Switch on the DNC 70.

The screen displays the MAIN MENU page.

The different options accessible from this page are explained in chapter"SUMMARY EXPLICATIONS OF THE MAIN MENU OPTIONS", page24.


PRESENTATION OF THE SCREEN PAGES

CURSOR ACCESSIBLE FIELDS

On all pages, when first displayed the cursor is located on the programmablefield on which it was placed during the last intervention on that page.

The cursor can be moved to the previous or following field by pressing the

or key.

Regardless of the cursor position on the page , pressing the and the

keys simultaneously moves the cursor to the first programmable fieldof the page.

When the cursor is located on a field, you have the possibility:

! to introduce a number or value using the numerical keyboard.

! to delete the contents using the key.

(Attention on certain pages pressing the key twice can delete allthe programmable fields on the page).

THE MAIN MENU PAGE 23

THE MAIN MENU

By pressing the key on the top right of the keyboard, the MAINMENU appears.

CHOICE ? __ 1 LIST OF PRODUCTS DNC / CRITERIA 2 PRODUCTION LIST KEY: 2 3 LIST OF PUNCHES 4 LIST OF DIES 5 LIST OF PUNCHES / DIES 6 PROGR. PUNCHES / DIES KEY: 2 7 PRODUCT PUNCHES / DIES

8 PRODUCT STATUS; L;

9 PRODUCT BENDS; STOPS

10 PRODUCT X; ;Y

11 PROGR.AXES DATUM KEY: 2 12 TRANSFER DNC <-> SRAM CARD 13 TRANSFER DNC <-> PC 14 MACHINE PARAMETERS KEY: 3 15 MACHINE CONTROL

Regardless of which screen page you are on, you can always gain access to

the main menu by the key, which allows you to circulate in thedifferent pages.

The option desired is chosen by entering the option number in the CHOICE

field on the first line of the screen and pressing the SEARCH key.


SUMMARY EXPLICATIONS OF THE MAINMENU OPTIONS

1 DNC PRODUCTLIST / CRITERIA

This double page displays the list of products in theDNC memory and allows selective searching ofproducts.

2 PRODUCTION LIST Displays the first of the 9 production pages available.

3 PUNCH LIST Displays the list of punches existing in the DNCmemory.

4 DIE LIST Displays the list of dies existing in the DNC memory

5 PUNCH / DIE LIST Displays the list of punch / die pairs existing in theDNC memory.

6 PUNCH / DIEPROGR.

From this page, it is possible to recall,program or delete a die, a punch or a punch / die pair.

7 PRODUCTPUNCHES / DIES

Displays the values of the toolsassociated with the product residing in the workmemory.

8 PRODUCT STATUS;

L;

Displays the product page which allowsto recall, program, modify or delete a product.Product programming by introduction, in numericalvalues, of the lengths and angles of the product to berealized.

9 PRODUCTBENDS;LEGS

Displays the page allowing to program ormodify the bending order.

10 PRODUCT X;

; Y

Displays for each sequence the calculated axis position.

11 PROGR. AXESORIGINS

Allows to program the axis positioncounter.

12 TRANSFER DNC <-> SRAM BOARD

Allows the global two way transfer of products, tools ormachine parameters between the internal memory andthe SRAM memory card.

13 TRANSFERDNC <-> PC

Allows the global or partial two way transfer ofproducts, tools or machine parameters between thefixed internal memory and a PC.

14 MACHINEPARAMETERS

Displays a series of pages which allow to introduce,display, modify or store the machine parameters.

15 MACHINECONTROLS

Page allowing to control and to modify the state ofcertain inputs and outputs.

For the PROGRAMMING OF PRODUCTS AND TOOLS, see the following pages.

PRODUCT PROGRAMMING PAGE 25

PRODUCT PROGRAMMING ANDMANAGEMENT

PRODUCT PROGRAMMING

Before starting to program a product, make sure that the tools necessary tomake the product exist in the DNC memory and write down the numbers ofthe punches and dies to be used.

To do this proceed as described below (if you are already familiar with thetools present in the DNC, you may pass directly to Programming on thePRODUCT STATUS page, page 26).

Consulting the list of punches

! On the main menu (reached by ), choose option 3 LIST OFPUNCHES

LIST p/d 1/ 1 p/d 1/__ __/__ __/__ __/__ PUNCH p 90° ___° ___° ___° hp 100.00 ___.__ ___.__ ___.__ rp 1.50 ___.__ ___.__ ___.__ TON/M 100 ___ ___ ___ DIE Ve ___.__ ___.__ ___.__ ___.__ d ___° ___° ___° ___° hd ___.__ ___.__ ___.__ ___.__ rd ___.__ ___.__ ___.__ ___.__ TON/M ___ ___ ___ ___ REF Y ___.__ ___.__ ___.__ ___.__ SAF X ___.__ ___.__ ___.__ ___.__

! The list of punches available in the DNC appears, with the name ofeach punch and its characteristics (angle, height and radius).

! Note the number of the most appropriate punch.

If you don't find a punch which corresponds to your needs, you can createone.

In this case refer to chapter "Programming punches".

It is possible, if more than four punches are programmed to see them by

pressing the key.


Consulting the list of dies

Proceed in the same way as described above for punches; access from themain menu, option 4 LIST OF DIES.

Once a punch and die have been chosen, they must be associated and a pairmade.

To do this, call the PROGR. PUNCH / DIE page.

Introduce the numbers of the chosen tools into the first two fields of the page

and press the key.

The tools having been programmed, you can start to program a product.

PROGRAMMING ON THE PRODUCT STATUS PAGE

The length of each face and the angle of a profile have to be defined innumerical values.

Call the PRODUCT STATUS page using the key, or by passing viathe main menu choosing the "PRODUCT STATUS" option.

This page presents as follows:

P 0 P+ ___ N 1 I/mm CODE CAL_/__.__ p/d __/__ St:_ Al:_ SS:_ Th: __.__ Kg/mm2 ___.___ Lmat _____ Dev L ____.__

-N- -L- - - -p/d- -ri- CR

TOL 1 ____.__ ____._°__/__ ____.__ __ ___ 2 ____.__ ____._°__/__ ____.__ __ ___ 3 ____.__ ____._°__/__ ____.__ __ ___ 4 ____.__ ____._°__/__ ____.__ __ ___ 5 ____.__ ____._°__/__ ____.__ __ ___ 6 ____.__ ____._°__/__ ____.__ __ ___ 7 ____.__ ____._°__/__ ____.__ __ ___ 8 ____.__ ____._°__/__ ____.__ __ ___ 9 ____.__ ____._°__/__ ____.__ __ ___ 10 ____.__ ____._°__/__ ____.__ __ ___

REMARK: On the following pages, you will find a systematic explication of all the fieldswhich figure on the PRODUCT STATUS page. If you wish to have a brief idea- without a lot of explications - of the method of programming, you may passdirectly to page 31.


PRODUCT STATUS page: Explication of the topscreen fields

P Product number- existent in the work memory or- to be created or- to be searched for

The product number must be a number of amaximum of 3 digits between 1 and 997.(998 and 999 are reserved numbers)

If the product is created from an empty page,the field contains the number 0The field keeps this value as long as theproduct has not been stored.

P+ Number of the next product which will beexecuted automatically.If this field is left empty, when the lastsequence of the product is executed, theprogram will return to the first sequence of thecurrent product.If it contains a product number, it will beexecuted immediately at the end of the currentproduct.This allows to follow on several programs oneafter another. Do not forget to program in thelast program the number of the first program inorder to close the loop.

N Number of the current sequence, whose axe'svalues are displayed on the SEQUENCE page.

I/mm Allows to choose the unit of length.Programmed at 1, the face length values areexpressed in Inches.Not programmed or programmed with a valueother than 1, the data is displayed inmillimeters.

CODE Code name or number (facultative), allowing toassociate supplementary information with theproduct number in order to facilitate productmanagement and searching.For the introduction of alphanumericalcharacters, see the annexed chapter, page 86.

CAL Allows automatic compensation of variations insheet metal thickness.For programming this field, refer to chapterCalibration, page 77.


p/d Punch / die pair.

St: Choice of product material, steel, aluminium or

Al: stainless steel.

S.S.: Program 1 in the field next the material used.If no field is programmed, steel is used bydefault.

Th: Material thickness.

Kg/mm2 (Sigma) Tensile strength.

Lmat Bending length.

Dev L Unfolded length of the product calculated bythe system according to DIN 6935 standard.


PRODUCT STATUS page : Explication of the tablecolumns

Each line (except the last) of the table on the PRODUCT STATUS pagerepresents data related to one bend.

-N- -L- - - -p/d- -ri- CR TOL

1 ____.__ ____._°__/__ ____.__ __ ___ 2 ____.__ ____._°__/__ ____.__ __ ___ 3 ____.__ __

-F- Automatic numbering of the faces.A "face" is defined as being that part of thesheet metal situated between two bends orbetween the edge of the sheet and a bend.The maximum number of faces which can beprogrammed for a product is 14.

-L- Face length. Designates the distance betweentwo bends or the distance between the edge ofthe sheet and the first bend.

- - Bending angle

p/d Allows, for a given bend, to define a specialtooling pair different from the one specified forthe product.

-ri- If the adjacent field CR (ideal curve) is empty,

when the key is pressed, this fieldindicates the internal bending radius calculatedtaking into account the angle, the material andthe tools.

The operator can enter the value of the internalradius which he considers to be correct, thenintroduce the value 1 in the CR field.


During the calculation, the TOL (tolerance)field indicates the distance defined according tothe illustration on page 30.

When working with ideal curve, this fieldindicates the theoretical radius requested by theoperator, (See annex chapter "Ideal Curve"page 78)

CR Number of bends requested when working withideal curves. (See annex chapter "Ideal Curve"page 78)This number must be between 3 and 99. Thevalue 2 makes it impossible to change modes.

Remark: This number must be such that thelength of the ideal curve segmentsare greater than half the length ofthe die V opening.

TOL Tolerance. If the value in the CR field is equalto 1, the tolerance indicates the value accordingto the illustration below.

R1 = Bending radius introduced by theoperator.

ri = Bending radius calculated by the system.

If the value in the CR field lies between 4 and99, indicates the difference between the chordformed by two bends and the arc of the theo-retical circle, that is the difference between thetheoretical radius ri and the apex A of thechord.

ri = Theoretical bending radius requested by the operator.

A = Apex.

For an example of ideal curve, refer to annex.


PRODUCT STATUS page : Example of programming asimple product

1. If you have not already on screen, call the PRODUCT STATUSpage.The screen displays the data concerning the product in the workmemory at present.

2. In order to program a new product, the work memory must be clearedby deleting the product already there.

If you do not wish to loose that product, you can transfer it to theinternal fixed DNC memory by following the instructions below; ifyou decide to delete the product you can pass directly to point 4.

3. To save the product:

! Place the cursor on the P field.

! Type the number which you wish to give to this product.

! Press (if the system replies "EXISTS", choose anothernumber for saving this product).

The product will be saved in the internal fixed memory with thenumber which you have given it.It will, however, remain present in the work memory.

4. In order to delete the product from the work memory:

! Place the cursor on the N field.

! Introduce the value 99.

! Press the key.

The work memory is now empty.

Note that the key only acts on the work memory and neverdestroys data contained in the internal fixed DNC memory.

5. The product in our example is defined as follows:

Thickness: 2 mmSigma: 45 Kg/mm2

Material: SteelBending length: 250 mm


6. Fill in the fields on the screen according to the model below, taking into account the following particularities:

CODE: Optional field.

p/d Insert the numbers of the tools which you have previouslylocated (see point, consulting the list of punches or dies).

Then fill the table columns.

Your screen should present as follows (but with the punch and dienumbers corresponding to your tools):

P 0 P+ ___ N 1 I/mm CODE EXEMPLE-01 CAL_/__.__ p/d 1/ 1 St:1 Al:_ SS:_ Th: 2.00 Kg/mm2 45.000 Lmat 250.000 Dev L ____.__

-F- -L- - - -p/d- -ri- CR TOL

1 80.00 -90.0°__/__ ____.__ __ ___ 2 60.00 90.0°__/__ ____.__ __ ___ 3 90.00 135.0°__/__ ____.__ __ ___ 4 85.00 -135.0°__/__ ____.__ __ ___ 5 120.00 ____._°__/__ ____.__ __ ___ 6 ____.__ ____._°__/__ ____.__ __ ___ 7 ____.__ ____._°__/__ ____.__ __ ___ 8 ____.__ ____._°__/__ ____.__ __ ___ 9 ____.__ ____._°__/__ ____.__ __ ___ 10 ____.__ ____._°__/__ ____.__ __ ___

7. After introducing the last length, press the key.The system calculates the radius of each bend as well as the unfoldedlength of the product and displays these values on the screen.

8. If you wish to modify a product, call the product on the PRODUCTSTATUS page (option 8 of the main menu).

1. To delete a bend:

! Place the cursor on the N field and enter the number of the faceto be deleted.

! Press the key; the face containing the bend is deleted.

2. To add a bend:

! Place the cursor on the N field and enter the number of the facein front of which you wish to insert a new face.

Press .The system inserts a line and copies the data of thecurrent bend. Fill in the LENGTH and ANGLE fields.

3. To modify the length or angle of a face:

! Place the cursor on the value to be modified and introduce thenew value.

4. Start the calculation by pressing .


Save this product in the internal memory by proceeding as follows:

1. Introduce the number you wish to give the product in the P field, inthis case the number 1 for this product which will be used later as anexample.

2. Press the key.If the system replies with the message EXISTS, choose anothernumber.

DEFINITION OF THE BENDING ORDER

The DNC 70 allows to define the bending order:

Press the key, to display the PRODUCT BEND; LEGS page(Only DNC 70 non graphic).

P 1 N 1 p/d 1/ 1 N FACE LEG CR p/d 1 __ __ __ __/__ 2 __ __ __ __/__ 3 __ __ __ __/__ 4 __ __ __ __/__ 5 __ __ __ __/__ 6 __ __ __ __/__ 7 __ __ __ __/__ 8 __ __ __ __/__ 9 __ __ __ __/__ 10 __ __ __ __/__ 11 __ __ __ __/__ 12 __ __ __ __/__ 13 __ __ __ __/__ 14 __ __ __ __/__

PRODUCT BEND PAGE; LEGS: EXPLICATION OF

THE TOP SCREEN FIELDS

P Number of the productcurrently in the work memory or- to be searched for.

N Number of the sequence being bent displayedon the SEQUENCE page.

p/d Punch / die pair associated with the product.


PRODUCT BEND PAGE; LEGS : EXPLICATION OF

THE TABLE COLUMNS

Each line (except the last) in the table on the PRODUCT BEND; LEGSpage represents data related to one sequence.

N Automatic numbering of sequencesA "sequence" is defined as being a movementof the machine axes for a given action.The maximum number of sequences which canbe programmed for a product is 14.

FACE Face number.

LEG Number of the face which will press against thestop.

The orientation of the legs is made as afunction of the bending order.

CR Number of bends requested when working withideal curve.

p/d Definition of a tooling pair for a particularbend (if different from the pair specified in thep/d field at the top of the page).


PRODUCT BEND PAGE; LEGS : EXAMPLE OF

SIMULATION OF A SIMPLE PRODUCT

For this example we will use the product created as an exercise on thePRODUCT STATUS page.It was stored under the number 1. (If you cannot find it, create it by followingthe instructions in chapter "PRODUCT STATUS PAGE", page 32).

Call this product to the screen by entering its number in the P field, and then

pressing the key.

Fill in the FACE and LEG fields as follows:

N FACE LEG CR p/d 1 1 0 __ 1/ 1 2 3 1 __ 1/ 1 3 2 1 __ 1/ 1 4 4 5 __ 1/ 1

The following illustrations show you the sheet metal before and after bendingfor each sequence.

Bend 1 on Face 1 and Leg 0



Press the key.

The system calculates the entire machine program (axes, functions, etc.) anddisplays the sheet metal manipulations to be made before each sequence. (Seethe sheet metal manipulation diagram below).

N FACE LEG CR p/d 1 1 0 __ 1/ 1 2 3 1 __ 1/ 1 RETURN 3 2 1 __ 1/ 1 4 4 5 __ 1/ 1 SWIVEL

Sheet metal manipulation


By pressing the key, you can consult the PRODUCT; X; ; Y

page which displays for each sequence the X and Y axes' values.

P 1 N 1

N -X- - - -Y- CY

1 78.06 90.0° 229.90 __ 2 145.51 135.0° 233.58 __ RETURN 3 58.06 90.0° 229.90 __ 4 119.39 135.0° 233.58 __ SWIVEL 5 _____.__ ___._° ___.__ 0 6 _____.__ ___._° ___.__ __ 7 _____.__ ___._° ___.__ __ 8 _____.__ ___._° ___.__ __ 9 _____.__ ___._° ___.__ __ 10 _____.__ ___._° ___.__ __ 11 _____.__ ___._° ___.__ __ 12 _____.__ ___._° ___.__ __ 13 _____.__ ___._° ___.__ __ 14 _____.__ ___._° ___.__ __

We are now going to see another bending order.

To do this recall the product to the screen by pressing the key twice.

Fill in the FACE and LEG fields as follows:

N FACE LEG CR p/d 1 4 0 __ 1/ 1 2 1 0 __ 1/ 1 3 2 1 __ 1/ 1 4 3 2 __ 1/ 1

The following illustrations will show you the sheet before and after bendingfor each sequence.




Press the key.

The system calculates the entire machine program (axes, functions, etc.) anddisplays the sheet metal manipulations to be made before each sequence.

N FACE LEG CR p/d 1 4 0 __ 1/ 1 2 1 0 __ 1/ 1 3 2 1 __ 1/ 1 RETURN 4 3 2 __ 1/ 1

By pressing the key, you can consult the PRODUCT; X; ; Y

page which displays for each sequence the X and Y axes' values.

P 1 N 1

N -X- - - -Y- CY

1 305.42 135.0° 233.58 __ 2 78.06 90.0° 229.90 __ 3 58.06 90.0° 229.90 __ RETURN 4 89.39 135.0° 233.58 __ 5 _____.__ ___._° ___.__ 0 6 _____.__ ___._° ___.__ __ 7 _____.__ ___._° ___.__ __ 8 _____.__ ___._° ___.__ __ 9 _____.__ ___._° ___.__ __ 10 _____.__ ___._° ___.__ __ 11 _____.__ ___._° ___.__ __ 12 _____.__ ___._° ___.__ __ 13 _____.__ ___._° ___.__ __ 14 _____.__ ___._° ___.__ __


THE SEQUENCE PAGE

Press the key, the system displays the first of the two SEQUENCEpages in large characters.

This page displays for each sequence in the -MEM- column the values aimedfor and in the -POS- column the axes' positions.

To change from one sequence to another, press the or key.

P 1 N 1 CY __ CR __ --MEM-- --POS--

90.0° Y1 293.11 350.92 Y2 293.11 351.05 X 133.91 51.85

Pressing the key a second time displays the second SEQUENCE pagein large characters.

This page displays:

P 1 N 1 Qm ____ Qp ____ Lb 5000 TON 78 Rx ___ Td _._s

Vy _ _ ∆∆∆∆T _._s TDC ___ SP ___ F1:___ F2:___ F3:___ F4:__ F5:__ Cr:___

Pressing the key a third time displays on one page the whole of the twoprevious pages.


This page displays a third column -COR- which contains any correctionsmade by the operator.

P 1 N 1 CY __ Th: 2.00 45.00 Kg/mm2 p/d 1/ 1 CR __/ri 2.78 --MEM-- --POS-- --COR--

90.0°

Y1 293.11 350.92 ____.__ Y2 293.11 351.05 ____.__ X 1 133.91 51.85 ____.__ Q ____ ____ Lmat 5000 TON 78 Rx ___ Td _._s Vy _ _ ∆T _._s TDC ___ SP ___ F1:___ F2:___ F3:___ F4:__ F5:__ Cr: 41

SEQUENCE PAGE : EXPLICATION OF THE TOP

SCREEN FIELDS

P Number of the product in the work memory.

N Bending order (sequence) number to be made.

CY Number of sequence repetitions.(programmed 0, the sequence is jumped)

Th Material thickness.

Tensile strength.

p/d Number of the punch/die pair associated withthe bend to be made.

CR/ri Number of bends requested when working withideal curve (min. 4), and internal bendingradius.


SEQUENCE PAGE : EXPLICATION OF THE SCREEN

COLUMNS

--MEM-- This column contains either the valuescalculated by the system when simulating, orthe values programmed by the operator.

--POS-- This column indicates the real axes' positions.

--COR-- This column contains all the sequence andproduct corrections introduced on theCORRECTION page.

The , Y1, Y2, etc. fields are dependant on the axes programmed

in the numerical control.

Q Number of product sequence repetitions.Quantity of products to be produced.

Lmax Bending length.

TON Bending force.

Rx Back gauge retraction.

Td Delay time for axis departure.

Vy Beam bending speed.Programmed at 0, the speed is 1 mm/s.Programmed at 9, the speed is 10 mm/s.(If the machine is capable of reaching thisspeed)

Vy Rising speed from BDC to CP.Programmable from 0 (slow) to 9 (fast).Allows to vary the speed at which the beamrises to the CP. (function depending on themachine's hydraulics).

∆∆∆∆T Dwell time.

TDC Distance from top dead center.

SP Distance from the beam speed changingpoint.(Switch Point).

F1: - F5:, Cr Value of the auxiliary functions F1 to F5 andcrowning.

These fields can also be re-programmed by the user.However, certain fields are related, that is modifying one provokes amodification of the other.


PROGRAMMING ON THE SEQUENCE PAGE

This page allows to display the calculated axes' values for each sequence, aswell as to modify these values.

It is automatically programmed when making a simulation.

It is also possible to program a product on this page without going through asimulation phase, as long as:

! The sheet metal thickness is programmed.

! The (sigma) is programmed.

! Y1 and Y2 are situated below the CP. (If they are situated above theCP, it determines a special cycle without the beam, see ANNEXES,Cycle without bend, page 79.)

! The safety values are respected.For example the programmed bending angle must be greater or equalto the die angle.

! The axes' limit switch values are respected.

This method of programming is simple and natural even for an operator withno experience of numerical controls.

SEQUENCE PAGE : SIMPLE EXAMPLE OF

PROGRAMMING

The following product is to be realized.

Th: 2mmLp: 1000mm


We wish to bend it in the following order:

- Bend 1 on FACE 1 and LEG 0- Bend 2 on FACE 3 and LEG 4- Bend 3 on FACE 2 and LEG 3

Bend 1 on FACE 1 and LEG 0




After having introduced on the PRODUCT STATUS page the choice of toolsand the values of the Th, and Lmat fields, call the SEQUENCE page by

pressing the key three times.

Program this page as follows:


90.0°

Y1 229.90 350.92 ____.__ Y2 229.90 351.05 ____.__ X 1 48.00 51.85 ____.__ Q ____ ____ Lmat 1000 TON 19 Rx ___ Td _._s Vy _ _ ∆∆∆∆T _._s TDC ___ SP ___ F1:___ F2:___ F3:___ F4:__ F5:__ Cr: 41

You will note that as soon as you leave the field, the system

calculates the Y1 and Y2 axes' values.

When you have filled in the X field, press the key, which will copy thefirst sequence in the sequence N° 2.


The following screen is displayed:


90.0°


You have simply to replace the values which are different for this sequence,in this case enter 18 in the X field.


90.0°


Repeat the operation for the third sequence.


Press the key.


90.0°


Enter the value 48 in the X field.


90.0°


The product is now completely programmed.

Remark: It is also possible to enter the values directly into the Y1 and Y2 fields, forexample to make a cycle without bend (see page 79) or a conical bend. In thelatter case, take care that the Y1 and Y2 values are not situated on opposite sidesof the CP.

PRODUCT MANAGEMENT PAGE 49

PRODUCT MANAGEMENT

CONSULTING THE GENERAL LIST OF PRODUCTS

From the main menu, choose the menu 1 LIST OF PRODUCTS or press the

key.

The system displays the list of products on a page as illustrated below:

P 1 CODE EXEMPLE-01 SEQUENCES PROGRAMMED 42 AVAILABLE 306

-LIST OF PRODUCTS IN MEMORY- 1 2 11 222 997 ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___

On the upper part of the screen the system displays the number of the productcurrently in the work memory as well as the number of the drawing of thatproduct.The DNC also displays the number of sequences programmed, as well as thenumber of sequences still available in the memory.The middle of the page shows, in ascending order, the numbers of all theproducts stored in the chosen memory.

REMARK: It is possible to call this list directly from all pages by pressing the key.


CONSULTING THE LIST OF PRODUCTS WITH

SELECTION CRITERIA

From the LIST OF PRODUCTS page press the key again.

The system displays the page as illustrated below:

P 0 -- CRITERIA -- CODE p/d __/__ Th __.__ Lmat _____ DevL ____.__ -- LIST OF PRODUCTS -- P CODE p/d ___ __/__ ___ __/__ ___ __/__ ___ __/__ ___ __/__ ___ __/__ ___ __/__

On the upper part of the screen is displayed the number of the productcurrently in the work memory.

Under the heading "CRITERIA" are displayed the different criteria accordingto which it is possible to search for a product.It should be noted that these criteria can be combined, that is it is possible, forexample, to ask for the list of all the products stored using a specific tool pairand having a particular material thickness.

The products meeting the defined selection criteria are displayed on thesecond half of the screen.

To make a search by criteria, proceed as follows:

1) Introduce one or more selection criteria in the fields provided.

2) Press .

The products meeting the specified criteria are displayed in the list ofproducts.

If the list contains 7 or more products, the following page or pages can be

displayed by pressing .

REMARK: If, on this page, SEARCH is pressed without specifying any criteria, the systemdisplays all the products contained in the memory. (The cursor must, however, beremoved from the P field).

This function is very useful, as it lists all the products with their principalcharacteristics.

To load the desired product in the work memory, see page 51.

PRODUCT MANAGEMENT PAGE 51

CALLING A PRODUCT FROM THE INTERNALMEMORY TO THE WORK MEMORY

This operation is possible from all pages on which the cursor can be placedon the P or CODE field.

Attention: The product already in the work memory is overwritten by theoperation described below:

1) Introduce the product number in the P field or the CODE number.

2) Press .

3) The product requested is then copied from the internal memory intothe work memory (the original of this product is, of course, conservedin the internal memory).

SAVING A PRODUCT IN THE INTERNAL MEMORY

This operation is used to permanently save a product located in the workmemory.

It is possible from all pages used to program or display products, as well asfrom the general list of products ("LIST OF PRODUCTS").

It should be noted that after saving the product remains present in the workmemory.

To save a product proceed as follows:

1) If you wish to give a drawing number or name to the product, fill inthe CODE field.This operation is optional.

2) Enter the number which you wish to give to the product in the P field(first line of the screen).

3) Press the key.

4) If the system displays the message EXISTS, choose another number todesignate the product.

If you wish to save a product under a number which already exists (eg. aftermodifying a product), the product bearing that number must first be deleted inthe internal memory (see page 52).

NB: Attention the N° 998 and 999 are reserved for special functions.

- 998 for the temporary storage of the work memory contents during PC <-> DNCtransfer.

- 999 for total deletion of the internal memory (see page 52).


DELETING A PRODUCT IN THE WORK MEMORY

Before creating a new product, the product already in the work memory mustfirst be deleted.

This operation is possible from all pages with a N field.

1) Position the cursor on the N field on the first line of the screen.

2) Introduce the value 99.

3) Press .

The work memory is thus completely deleted.It should be noted that this action has no effect on the internal memory.

DELETING A PRODUCT IN THE INTERNAL MEMORY

1) Call the list of products.

2) Place the cursor on the P field and introduce the number of the productto be deleted.

3) Press .

The product is thus deleted from the memory.

It should be noted that this action has no effect on the work memory.

DELETING ALL THE PRODUCTS IN THE INTERNALMEMORY

1) Call the product list.

2) Introduce the value 999 in the P field.

3) Press

Attention this operation deletes the totality of the products stored in theinternal memory without the possibility to cancel this command.

TOOL PROGRAMMING PAGE 53

TOOL PROGRAMMING AND MANAGEMENT

The DNC 70 has several pages which allow consultation of the list of existingtools, to display them and / or program new ones.

The DNC 70 memory can hold a maximum of 20 punches, 30 dies and 40punch/die pairs.

As it is often easier to modify a tool than to create one, we will first explainhow to examine the existing tools.

CONSULTING THE TOOLS

Consulting the list of punches

1. From the main menu choose option LIST OF PUNCHES.

2. The system displays the list of punches existing in the memory, withthe number and characteristics of each punch:

LIST p/d 1/ 1 p/d 1/__ __/__ __/__ __/__ PUNCH p 90° ___° ___° ___° hp 100.00 ___.__ ___.__ ___.__ rp 1.50 ___.__ ___.__ ___.__ TON/M 100 ___ ___ ___ DIE Ve ___.__ ___.__ ___.__ ___.__ d ___° ___° ___° ___° hd ___.__ ___.__ ___.__ ___.__ rd ___.__ ___.__ ___.__ ___.__ TON/M ___ ___ ___ ___ REF Y ___.__ ___.__ ___.__ ___.__ SAF X ___.__ ___.__ ___.__ ___.__

If your DNC contains more than 4 punches, you can call the following page

or pages by pressing .

3. If the list of punches is empty, you must create your punches startingfrom zero. To do this go to chapter "Programming a punch", page 56.


Consulting the list of dies

From the main menu, choose option LIST OF DIES.

The consultation of the list of dies can be done in the same way as explainedfor the punches.

Consulting the list of punch / die pairs

From the main menu, choose option LIST OF PUNCH / DIE PAIRS.

The consultation of this list can be done in the same way as explained for thepunches and dies.


PUNCH / DIE PROGRAMMING

GENERAL EXPLICATIONS

The programming of tools is done by introducing their values and dimensionson the page as represented below.

Call the PROGRAMMING PUNCH / DIE page (via the main menu).

The DNC 70 graphic programming procedure for punches and dies is thesame as the non-graphic.The DNC 70 graphic version requires more information for toolsprogramming.The graphic drawing shows clearly the additional required data.

The different fields have the following significance:

PUNCH

p Punch angle.

hp Height of the punch between the lowest part ofthe beam and the point of the punch.

rp Punch radius.

TON/m Maximum force supported by the punch perlinear meter.

DIE

Vd Width of the V opening

d V angle.

hd Height of the die from the surface of the table.

rd Die radius.

TON/m Maximum force supported by the die per linearmeter.

REF Y Sum of the hp and hd.This value is automatically calculated duringprogramming of pairs. See ANNEXES

SAF X X Safety distance.(Not programmed = half V opening)

a: and b: Table and die dimensions according to thedrawing displayed on the screen.


PROGRAMMING A PUNCH

1) On the PUNCH / DIE PROGRAMMING page, delete the values on

this page by pressing the key twice.

2) Fill in the different fields.

3) If you wish to save this new punch proceed as follows:

a) Place the cursor on the PROGR. p/d field and introduce thenumber you wish to give to this punch as indicated below.

Attention: The die N° must not be programmed.

PROGR. p/d 1/__ PUNCH p 90° [ ] hp 100.00 [ ] rp 1.50 [ ] TON/m 100 \/ DIE Vd 15.00 ----\ /---- d 90° [ \/ ] hd 100.00 [--a-- ] rd 1.50 [ ] TON/m 100 ---------------- REF Y 200.00 [ ] SAF X 10.00 [---b--- ] a: 20 [ ] b: 30

b) Press .

c) If the system displays the message EXISTS, choose anothernumber.

CREATING A PUNCH BY MODIFYING AN EXISTING ONE

1) Choose the punch which will serve as a basis by consulting the list ofpunches using the procedure described on page 53

2) Modify the dimensions or values as necessary.

3) Save the new punch by introducing its number in the p/d_/_ field and

then pressing the key.


MODIFICATION AND SAVING OF AN EXISTING PUNCH

1) On the PUNCH / DIE PROGRAMMING page call the punch to bemodified by introducing its number in the p/d __/__ field and pressing

.

2) Modify the values as necessary.

3) To be able to save this punch under the same number, the formerversion must first be deleted from the internal memory.

Place the cursor on the punch number and press the key.

Leave the cursor at the same place and press .

The former version of your punch has now been replaced by the newone which has the same number.

DELETING A PUNCH

1) Call the LIST OF PUNCHES page (via the main menu).

2) Place the cursor on the number of the punch to be deleted.

3) Press .

PROGRAMMING A DIE

The programming of a die is done in the same way as for a punch.

1) On the PUNCH / DIE PROGRAMMING page, delete the values on

this page by pressing the key twice.

2) Fill in all the fields, from top to bottom.

3) To save this new die, proceed as follows:

a) Place the cursor on the PROGR. p/d field and introduce thenumber you wish to give to the die.

b) Press .

c) If the system displays the message EXISTS, choose anothernumber.


CREATING A DIE BY MODIFYING AN EXISTING ONE

This procedure is similar to that described for creating a punch by modifyingan existing one. Please refer to page 56.

MODIFICATION AND SAVING OF AN EXISTING DIE

This procedure is similar to that described for modification of a punch. Pleaserefer to page 57.

DELETING A DIE

1) Call the LIST OF DIES page (via the main menu).

2) Place the cursor on the number of the die to be deleted.

3) Press .

PROGRAMMING A PUNCH / DIE PAIR

This procedure is identical to that described for punches and diesindividually, except that you must have introduced a number for the punchand a number for the die in the p/d field before saving.

TRANSFER PAGE 59

TRANSFER

The DNC 70 allows to exchange data with a SRAM memory card or a PC.

DNC <-> SRAM CARD TRANSFER PAGE

Select option "Transfer DNC <--> SRAM CARD" of the main menu.

TRANSFER _ 1= DNC --> CARD 2= CARD --> DNC

_ 1= PRODUCTS 2= TOOLS 3= PARAMETERS 4= PRODUCTION

Introduce in the first available field the number corresponding to the transferdirection desired.

Introduce in the second available field the number corresponding to thememory to be transferred.

ATTENTION: When transferring, the contents of the destination memory will be overwrittenby the new data after asking for confirmation if the contents of the card is notthe same.

A SRAM card can contain either:- all the products (internal memory)

or:- the machine parameters + the tools + the production pages.

It must be clearly understood that even if the internal memory contains onlyone product, during transfer of this internal memory (choice "DNC <-->CARD") the whole of the SRAM card will be used.

Thus products must never be put with machine parameters, tools orproduction data under risk of loosing the latter information.

Recommendation: It is strongly recommended to keep separately on a special card in a safeplace the machine parameters such as they were programmed on delivery ofthe machine.A paper saving is strongly recommended.


DNC <-> PC TRANSFER PAGE

This page allows data transfer to an IBM, XT, AT or compatible PC, eitherby a RS 232 serial line or by the intermediary of a BIP casing.

It also offers the possibility to transfer either all the products or isolatedproducts.

For transfer to an IBM PC by serial line the DNC 70 must be equipped with aRS232 or RS422 serial link and the PC must be equipped with the CYBELECPC7000/70 or PC90 with option LINK7000 software or with the PC storagesoftware of the CYBACK type.

The BIP casing allows the transfer of data contained in a SRAM card to a PC(see special notice)

Select option "Transfer DNC <-->PC" of the main menu or from the

TRANSFER DNC <-> SRAM BOARD page press the key.

DNC <-> PC STATUS RS 232 TRANSFER _ 1 DNC --> PC 2 PC --> DNC 3 DATA LINK TEST PC-DNC 4 DNC --> BIP 5 BIP --> DNC

CHOICE _ 1 PRODUCTS 2 TOOLS 3 PRODUCTION 4 PARAMETERS 5 COMPACT PRODUCTS 6 PRODUCTS N° ___ ( ) ___ ( ) ___ ( )

The TRANSFER field allows to select the transfer direction as well as to testthe link and also to transfer data on a SRAM card to a BIP casing.

The CHOICE field allows to select the objects to be transferred.

In the case of option 6 PRODUCT Nr, it is necessary to fill in the last fieldsof the page with the numbers of the products to be transferred.

TRANSFER PAGE 61

TRANSMISSION TESTS

After having programmed the concerned parameters as above, it is possible tocarry out a transmission test. To do this:

! Verify that the transmission parameters are programmed 100 %identically on the DNC side and the PC side.

! Select the transfer page.

DNC <-> PC STATUS RS 232 TRANSFER _ 1 DNC --> PC 2 PC --> DNC 3 DATA LINK TEST PC-DNC 4 DNC --> BIP 5 BIP --> DNC

CHOICE _ 1 PRODUCTS 2 TOOLS 3 PRODUCTION 4 PARAMETERS 5 COMPACT PRODUCTS 6 PRODUCTS N° ___ ( ) ___ ( ) ___ ( )

! Program the TRANSFER field to "DATA LINK TEST PC<-->DNC"

! Press the field, the status indicates "TEST"

Active transmission test

The DNC sends a character through the serial port, and waits for the receiptof the same character through the same port ; the character received beingcompared to the character sent :

To run this test you must either :

! Connect a loopback connector to the exterior of the port to shortcircuit the line in feeding output characters directly to the input, or

! Connect the transmission cable to the DNC, and fit the loopbackconnector on the other end of the cable, or

! Connect the transmission cable to the DNC and connect the PC to theother end of the cable, then, on the PC, use the transmission menus togo into passive mode.


When the required connection has been made :

! Press the key to start the test.The message "RUN" should blink rapidly.

! To stop the test, press the key (STOP)

Passive transmission test

The DNC waits for a character to appear on the input line, and the momentone is received, it is sent back via the output line.In order to run this test you should connect the transmission line between theDNC port and the PC port.When the connection has been made, put the PC in active test mode by usingthe transmission menus.The message "RUN" should blink rapidly on the DNC.

NB : Pin 2 wired to pin 3Pin 4 wired to pin 5Pin 6 wired to pin 20

Loopback connector schematic (idem for loopback 9 pins)

TRANSFER PAGE 63

WORKING MODES PAGE 65

THE MACHINE WORKING MODES

3 working modes are generally available at machine level, these modes arenot affected by any safety systems such as a two-hand post, secured pedals,stops at safety point, light beam barrier etc.

Adjustment mode

Sensitive mode

Automatic mode

These modes are independent of the DNC modes and canbe combined.

Exception: The adjustment mode will only function with the DNC in mode.

Adjustment mode

This mode only functions with the DNC in mode.

If this is not the case, the press refuses to descend.

In this mode the table only functions in bending speed with the pressure andspeed programmed in the current sequence.

It is possible to make small movements in stages as a function of the descentor rising commands given by the operator. The top dead center of the currentsequence is active, it is thus not possible to raise the beam above this point.

On the other hand, the bottom dead center programmed in the sequence is notactive. Thus only stopping the descent command, or a mechanical stop (punchin the die), or the lower limit switch will stop the beam in the descent phase.

Depending on the manufacturers and the safety standards in force in thecountry, the functioning can be different.


Sensitive mode

DNC in mode.

The functioning is identical to adjustment mode, except that the rise to theTDC is made in one movement.

DNC in or mode.

The press works in the conventional way, that is:

! High speed approach

! Deceleration

! Safety stop

! Bending

! Bottom dead center

It is at the bottom dead center (BDC) that the differences appear.

The DNC remains under pressure at the bottom dead center until the descentcommand disappears, and this indifferently to the dwell time at BDC.

When the descent command is suppressed, the DNC remains at the BDCwithout pressure or descent command, until reception of a rise commandwhich it executes immediately

Depending on the country and the manufacturer, this mode can be slightlydifferent.

Automatic mode

This mode functions in a similar way to sensitive mode, except that theraising of the beam is made automatically once the dwell time programmed inthe current sequence has elapsed.

This even if the descent command remains active.

NB: In all these modes the ascent command has priority. It is executedimmediately on its reception

THE INITIALIZATION PAGE PAGE 67

ANNEXES

THE INITIALIZATION PAGE

This page appears if a calculation is impossible, due to unprogrammed data oran incorrect value.

It can also appear as a result of pollution of one of the memory zones whichwill also give impossible calculations.

It appears each time the DNC is switched on with the key in position 3.

INITIALIZATION DNC 70 PS

-- MEMORY ZONE --

_ Clear variable zone

_ Clear punch-die zone

_ Clear machine parameters zone

EXECUTION CODE ___

If point n°1 does not re-establish a normal situation, go on to the next pointand so on.

The following operations successively delete all data contained in the selectedmemories. It will thus be necessary to re-enter the erased data.

1) Turn the key to position 3 then back to 0.

2) Enter the value 1 in the Clear variable zone fieldand the value 817 in the EXECUTION CODE field.

Press the key.Turn the key to position 3 then back to 0.


3) Enter the value 1 in the Clear variable zone fieldthe value one 1 in the Clear punch-die zone fieldand the value 817 in the EXECUTION CODE FIELD.

Press .Turn the key to position 3 then back to 0.

4) Enter the value 1 in the Clear variable zone fieldthe value 1 in the Clear punch-die zone fieldthe value 1 in the Clear machine parameters zone field.and the value 817 in the EXECUTION CODE field.

Press .Turn the key to position 3 then back to 0.

The deletion of the machine parameters also deletes all configurations of theinputs / outputs defined by the operator.The DNC 70 must be re-configurated before being used again.

THE TOOL REFERENCE VALUE PAGE 69

THE TOOL REFERENCE VALUE

The machine has been adjusted according to the following principle:

When, theoretically, the punch's leg face on the beam is in contact with thesurface of the table, the value of the Y1 and Y2 counters is 000.00.

In practice this adjustment is made using two calibrated blocks, whose valuehas been introduced into the counters.

Definition:The reference value (REF Y) is theoretically the sum of the heights of bothtools; punch and die.

The height of the punch is the distance between the "point" of the punch andits leg face on the beam.

The precision of all bends realized by the machine depends on the referencevalue REF Y.

The numerical control calculates the bending depth using:

! the REF Y value,

! the geometrical values of the tools,

! the sheet metal thickness.

If the resulting bends differ greatly from the programmed value, the referenceand the values above must be controlled.


To control the reference, simply, in mode, place the point of the punchon the flat of the die (be careful with the pressure of the active sequence) andread the value indicated by the POS Y1 and Y2 counters.

This value must be identical, for both counters and also correspond to theREF Y reference value displayed on the PUNCH / DIE PROGRAMMINGpage.

If it is not possible to move the die to obtain a situation as shown above, it ispossible using a die with a small opening, to place on the die a thick sheet(which will not bend under the weight of the beam) or blocks of a knownprecise thickness, (see figure below).

The value of the material introduced between the punch and the die must thenbe subtracted to obtain the reference value REF Y.

THE TOOL REFERENCE VALUE PAGE 71

Y1 and Y2 counters greatly different

If the counters are not identical and present a difference superior to what isnormally tolerated (the press in this case furnishes an angle which varies fromone side to the other of the machine), a test must be made with another tool inorder to determine if the difference comes from the tool itself (tool badlyfinished presenting a difference in height along its length) or if the press isbadly calibrated. In the latter case, you must contact the manufacturer.

Y1 and Y2 counters identical, but different from REF Y

If the difference between the counters Y1 and Y2 is within the acceptabletolerance, but the Y1-Y2 value is greatly different from the REF Y value, youmust determine if the difference comes from the height of the die or that ofthe punch.

In this case the tool at fault must be corrected so that the REF Y result isidentical to the value of the Y1 Y2 counters.

Reference correction for the product

The possibility exists to correct the reference for each tool used for theproduct. This correction is stored with the product.

It is in some ways a reference correction per product tool. It is thus possiblein this case for the same tool pair used for two distinct products, to have areference modified positively in the product XXX and to have a referencemodified negatively for the product YYY.

The principle of measure / control is identical to that which is describedabove.

To correct the reference in a particular product, you must access thePRODUCT TOOL page via the main menu and program the new reference inthe REF Y field which is accessible by the cursor.

All the sequences having the same tooling will be modified.


THE CONTACT POINT (CP) OR PINCH POINT

Definition:

The contact point is the position of the beam which corresponds to themoment when the point of the punch makes contact with the sheet metalplaced in the die.

This point is not programmable, but is calculated by the DNC using the REFY value and the sheet thickness.

The position is determined by the following calculation:

PCT = REF Y + Th (sheet thickness).

The CP is used by the DNC cycle to maintain the sheet when an X backgaugeretraction is programmed.

As we have seen at the beginning of this chapter, the CP is closely linked tothe Y reference and the sheet thickness.

The following cases may occur:

a) the sheet is not pinched during X backgauge retraction

b) the sheet is bent too much during X backgauge retraction

To remedy these problems you must:

! verify the sheet thickness and if necessary correct it

! verify the reference and if necessary correct it.

A simple way of verifying the position of the CP is to program a sequencewith a very large retraction (approx. 400 mm) and make a descent of thebeam.

During the execution of the retraction, the beam stops on the sheet, it is thuseasy to control if the sheet is pinched sufficiently or too much.

Simply interrupt the descent command before the end of retraction to preventthe beam from bending the sheet. An ascent command frees it immediately foranother try.

For the softwares having the "CP correction" parameter, if the reference, thetooling dimensions and material thickness are correct you can modify thisparameter in order to correct the CP (adjustment of the material clamping)without interfering with the other points.

THE 4 TO 6 AXES PAGE 73

THE 4 TO 6 AXES

The programming principle is exactly identical to 3 axes DNCs.

The addition of supplementary axes does not present any difficulties for theoperator, the fields being clearly defined on the screen.

The safety factors concerning the supplementary axes such as R, X1, X2, Z1and Z2 are described below.

X-R SAFETY FACTORS

When the R axis is a digital axis, an anti-collision safety factor is introducedinto the DNC, and prohibits the positioning of the gauge probes in the die.

A safety zone encircling the die provokes a particular type of positioningwhen the probes position themselves in this zone.

The safety zone encircling the die is defined by the data introduced in themachine parameters, and are defined by the manufacturer.

The zone where all positioning is prohibited, is defined using the valuesintroduced for each set of tools.


X-R safety positioning diagram

X"o R"o = machine parameters valueXo = "C" die valueRo = "h" die value.X'o = Xo + X"oR'o = Ro + R"oXc = X axis current valueRc = R axis current valueXv = X axis target valueRv = R axis target value

THE 4 TO 6 AXES PAGE 75

TWO EXAMPLES OF SPECIFIC POSITIONING AT THE X-RSAFETY POINT

These two examples show that it is possible to position in the safety zone.

If the positioning requested is situated in the prohibited zone, the DNC

refuses to go into or mode and the cursor moves to the X field.


X1-X2 SAFETY FACTOR

The safety factors offered for X1 X2 are identical to the ordinary X axis.

The nearest axis (X1 or X2) to the die is taken into account for the safetyfactor.

Z1-Z2 SAFETY FACTOR

An anti-collision safety factor prevents the passage to and modes, and the interactive message "Z1-Z2" is obtained if the positioning isimpossible.

Normally the origin of the Z axes is on the left of the machine when lookingat the front of the machine.

PROGRAMMING THE AXES DATUM

Select option 11 of the main menu, the following page appears:

AXES DATUM --SET-- --POS-- X _____.__ 0.00 Y1 ____.__ ____.__ Y2 ____.__ ____.__

! Turn the key to 2.

! Introduce in the SET column the values for the axes datum.

! Leave the field for validation. At this moment , the POS field takes thenew value.

CALIBRATION PAGE 77

CALIBRATION

The CAL (calibration) field on the PRODUCT STATUS page is used for theautomatic compensation of variations in sheet metal thickness.

This system functions in two different ways.

a) For thin sheets, whose resistance in the tools is not capable ofsupporting the weight of the beam at minimum pressure.In this case the addition of our control system with sensor bars andprogrammable automat is necessary.To use this system, please refer to the special notice which comes withthe equipment.

b) For thicker sheets, whose resistance in the tools is capable ofstopping the beam at minimum pressure.

The principle of functioning is as follows:

The beam approaches the sheet at minimum speed and pressure, theresistance of the sheet will stop the beam. This stop allows to measure thethickness of the sheet under the punch, and in the case of a difference with areference sheet, to make a correction.

It is thus essential that the sheet is rigid enough to stop the beam withoutflexing, otherwise the measure will be false.

Procedure

Calibration is only possible on sequence N° 1.

! Measure a reference sheet with a micrometer.

! Introduce this value in the Th field.

! Program the CAL field at 3.

! Verify that the DNC is on the sequence N° 1.

! Change to mode.

! Place the reference sheet in the tools and bend.

! Once the bend is finished, the CAL field changes automatically to thevalue 4, which confirms that the calibration has been made.

The calibration is only done once for a series of products of the samethickness.

Use

After calibration, it is possible to work in mode. The measurement ofthe sheet is made for each product on sequence N° 1.

To leave this work mode, clear the CAL field using the key.

If any modifications are made to the tools, it will be necessary to repeat thecalibration.


IDEAL CURVE

Call the PRODUCT STATUS; L; page and fill in the fields as

described below.

P 0 P+ ___ N 1 I/mm CODE CAL_/__.__ p/d 1/ 1 St:1 Al:_ SS:_ Th: 2.00 Kg/mm2 45.000 Lmat 2000 Dev L ___.__

-N- -L- - - -p/d- -ri- CR TOL

1 100.00 90.0°__/__ 50 00 15 ___ 2 200.00 90.0°__/__ ____.__ __ ___ 3 100.00 ____._°__/__ ____.__ __ ___ 4 ____.__ ____._°__/__ ____.__ __ ___ 5 ____.__ ____._°__/__ ____.__ __ ___ 6 ____.__ ____._°__/__ ____.__ __ ___ 7 ____.__ ____._°__/__ ____.__ __ ___ 8 ____.__ ____._°__/__ ____.__ __ ___ 9 ____.__ ____._°__/__ ____.__ __ ___ 10 ____.__ ____._°__/__ ____.__ __ ___

and press the key.

The system fills in the Dev. L, ri and TOL fields.

Lmat 2000 Dev L 372.79

-N- -L- - - -p/d- -ri- CR TOL

1 100.00 90.0° 1/ 1 50 00 15 0 2 200.00 90.0° 1/ 1 2.13 __ ___ 3 100.00 ____._°__/__ ____.__ __ ___

In this example, a last bend having an internal bending radius of 50mm is tobe made.

To do this, we will proceed with a successive series of bends.

The number 15 gives a good approximation, as the tolerance, that is thedifference between the apex of the chord and the theoretical radius, is 0mm.

Press the key and fill in the LEG and FACE fields as below.

P 0 N 1 p/d 1/ 1 N FACE LEG CR p/d 1 1 0 15 1/ 1 2 2 1 __ 1/ 1

The X MEM values on the sequence page do not correspond to the positionactually aimed for by the axis during ideal curve.

PRODUCTION PAGES PAGE 79

CYCLE WITHOUT BEND

The cycle without bend is used to move the axes and auxiliary functionswithout moving the beam.

To do this, the Y1 and Y2 values are programmed at a value greater than thatof the contact point (CP), see Annexes page 72.

The cycle proceeds as follows:

! Descent command

! TDC output cut

! End of bend impulse

! Sequence forward

! Start of axes and auxiliary functions depending on the mode

! TDC output activated

! Control synchro impulse

! Wait descent command

This cycle has been defined for re-arming the electrical cabinet for a newbend.


PUNCHING

PUNCHING USING PUNCHING TOOLS

It is essential in this mode to know the approximate exit value of the punch.

To do this make a descent with the machine in adjustment mode and

the DNC in mode.

When the punch reaches its exit point, stop the descent and note the positionof the beam.

It is also possible to make this measurement with the machine in sensitive

mode and the DNC in mode.

Introduce this value in Y1 Y2 without programming an angle.

The tool reference value must be regulated as a function of the height of thetools used.

BOTTOMING

As for most work under pressure, it is preferable to do this type of bending inthe center of the press.

The values are those of the tools used.

Do not program an angle and leave the Y1 and Y2 fields unprogrammed.

The press makes the descent in the conventional way until the beam stops inthe bottom of the die with the pressure of the current sequence.

The DNC notes that the beam has stopped and the ascent cycle is thenswitched on.


ANGLE CORRECTION

It can happen that the angle bent is slightly greater or less than the angleprogrammed.

The operator has then the possibility to introduce the real value of the anglebent. The DNC will correct the Y1 and Y2 axis values in consequence.

This page allows to introduce and display the corrections on the calculatedaxis values for the current product and bend.

There are as many CORRECTION pages as there are bends (sequences).

Call the CORRECTION page by pressing the key.

The passage to the following or previous bend is made using the or

keys.

N 1 CY __ -COR N- -COR P-

___._°

Mes ___._° ___._° Y1 ___.__ ___.__ Y2 ___.__ ___.__ X ___.__ ___.__

The CORRECTION page is programmable when the DNC is in semi-automatic mode, which saves the operator from making several modechanges.


CORRECTION PAGE : EXPLICATION OF THE TOP

SCREEN FIELDS

N Indicates the N° of the bend to which the page refers.

CY Indicates the number of times the sequence is to berepeated.

CORRECTION PAGE : EXPLICATION OF THE TABLE

COLUMNS

COR N Indicates the corrections which will only be valid for thebend whose number figures in the N field at the top ofthe screen.

COR P Indicates the corrections which are valid for all theproduct bends.

Value of the angle to be realized.

MES Value of the angle after incorrect bending.

Y1, Y2, X, etc. Correction which the operator wishes to make to theaxis values.


ACCESS TO THE PRODUCTION MANAGEMENT PAGES

There are 9 of these pages.

They contain information on the production times by managing four counters.

CONSULTING THE PRODUCTION PAGE

The production page is accessible via the PRODUCTION LIST option(option 2 of main menu).

It allows to load and display an order.

PRODUCTION PAGE __ WEEK __/__ OPERATOR N __ PRIORITY __ ORDER N DATE __/__/__ CODE N P ___ QUANTITY REQUIRED ____ REALIZED ____ PUNCH/DIE : p/d __/__ __/__ THICKNESS __.__ St:_ Al:_ SS:_ WIDTH _____.__ Kg/mm2 ___.___ LENGTH ____.__ PRODUCTION TIME : REQUIRED __ h __ min REALIZED __ h __ min TOOLS ADJUST. TIME: REALIZED __ h __ min PRODUCT SET UP : REALIZED __ h __ min PROGRAMMING TIME : REALIZED __ h __ min


PRODUCTION PAGE : EXPLICATION OF THE FIELDS

PRODUCTION PAGE Number of an order- located in the work memory or- to be created or- to be searched for

The order number must be between 1 and 9.

If the order is created from an empty list, the field does not contain thenumber 1. The first order must be saved with the value 1.

The WEEK, N OPERATOR, PRIORITY, N ORDER and DATE fields areoptional and have only an indicative value.

N CODE Code number of the product.When the code number or name is introduced,if it exists, the first product having been savedwith this number will be called into theproduction page. If the number or name doesnot exist, it will be replaced as soon as theproduct number is introduced.

P Number of the product to be associated withthe order.As soon as the cursor leaves the P field, thePUNCH/DIE, THICKNESS, St Al SS,WIDTH, and LENGTH fields areautomatically filled with the values saved withthe product.

QUANTITYREQUESTED

Number of products to be produced.

QUANTITYREALIZED

Number of products already produced.This field is incremented each time a productassociated with the order is executed.


WORKING TIME

The requested and realized times can be modified at all times by the operator.

Four counters allow to totalize the production times.

The time of:

PRODUCTION corresponds to AUTO mode

TOOL ADJUSTMENT corresponds to MANUAL mode

PRODUCT ADJUSTMENT corresponds to SEMI-AUTO mode

PROGRAMMING corresponds to PROGRAMMING mode

For the times to be managed, the fields must not remain empty.

Also for the PRODUCTION, TOOL ADJUSTMENT and PRODUCTADJUSTMENT counters to turn, the machine must have been indexed.

Counting is only done if the operator has left the PRODUCTION page, inorder to prevent any modification during time calculation.

LOADING AND SAVING AN ORDER

If necessary clear the page by pressing the key twice.

After having filled in the chosen fields, press the key.

The effects of this function are:

! to control that the number of orders is not greater than the foreseenlimit of 9, if so the COMPLETE message is displayed.

! to display the message STORED if the storage has been donecorrectly or LAST if it is the biggest order number recorded. Thestorage of an order with a number greater than n+1 orders alreadyrecorded provokes the storage under the number n+1.

CONSULTING THE ORDERS

It is possible at all times to display the orders.

From the PRODUCTION page, the next job on the list can be displayed by

pressing the key and the previous job by pressing the key.This is a round robin list.You can also designate a page number in the PRODUCTION PAGE field

and press the key.


DELETING AN ORDER

The key deletes the order whose number is displayed in thePRODUCTION PAGE field.

The remaining orders are recompacted.

To delete all the pages, enter 99 in the PRODUCTION PAGE field and press

the key.

INTRODUCING ALPHANUMERICAL CHARACTERS INTO

THE FIELDS

Certain fields, such as the CODE fields of the PRODUCT STATUS page orthe ORDER field of the PRODUCTION page, allow the introduction ofalphanumerical characters.

To introduce these characters, the and keys are used,combined with the numerical keys of the keyboard.

Example: To introduce the character A, press the key and keepingthe latter held down, press the 0.

Here is the correspondence of these keys:

0 1 2 3 4 5 6 7 8 9----------------------------------------------------------------------------

A D G J M P S V Y \

B E H K N Q T W Z ]

C F I L O R U X [ ^

SAFETY AND INTERACTIVE MESSAGES PAGE 87

SAFETY AND INTERACTIVE MESSAGES

Whenever the or mode keys are pressed to try and enter into themachine working modes, the safety systems are verified and any error is

mentioned by the impossibility to pass to or mode.

The DNC forces the mode; the cursor positions itself on the fieldconcerned and the interactive field indicates ERROR.

The error must then be corrected and the passage to or mode betried again. If another error exists the process repeats itself until all theprogramming faults have been corrected.

THE INTERACTIVE MESSAGES

LAST Displayed in mode when the sequence shown isthe last of the product.

FREE Displayed in mode when the buffer is empty (nosequences programmed).

IGNORE Displayed when the key used cannot (must not) be usedat that time.

COMPLETE Displayed in mode when the buffer is full. (nomore space for an additional sequence).

COPIED Displayed in mode when a new sequence has been

created at the end of the program using the key.

END Displayed in or mode, indicates the lastsequence of the program.

NO WRITE Displayed in mode when an attempt is made tostore or delete with the key in position 0.


DELETED Displayed in mode when a product or sequence is

deleted using the key.

EXISTS Displayed in mode when the product numberchosen for storage already exists in the cassette.

STORED Indicates that the storage operation has been madecorrectly.

INSERTED Indicates that the insertion has been made correctly.

NO PLACE Indicates that the product list memory has no morespace available.

NEXT Is displayed during successive display ( key) ofthe sequences which exist in the buffer (except for thelast sequence which indicates END).

PREVIOUS Same as NEXT but with the key.

EXECUTED The DNC has made the calculation correctly(corrections, transformations, etc.).

ERROR This message is indicated when a calculation isimpossible, or would create out-of-range values.When security measures are in force (in other wordswhen an axis is told to move beyond its authorizedlimits).

This information is followed by a return to modeand the cursor positions itself automatically over thefield to be corrected.

NO ACTIVE Indicates an attempt to change to or modeon a sequence where the CY is programmed at 0.

UNDEFINED Refusal to change to or , if the parametersvital to execution are only partially programmed andthus prevent the verification calculations.

TOL. ZONE Displayed in or mode when the axes arepositioned outside of their tolerances.

TEACH OK The TEACH operation has been made correctly.

SAFETY AND INTERACTIVE MESSAGES PAGE 89

RUN Indicates that the transmission is being made correctly.This message flashes slowly for the duration of thetransmission.

TIME OUT Indicates that the DNC has not received any validinformation since the beginning of the transmission, andthus returns the command to the operator. This messageappears after about 30 seconds.

ERROR In the case of a transmission exterior-DNC, this messageindicates that the data received are not valid, and thusimpossible to read.

STOP Indicates that the transmission has been interrupted bymeans of the DNC STOP key.

Err - axes Following error (theoretical trajectory).

synchro The maximum authorized separation (X1<->X2) hasbeen exceeded.

Err - FC Limit switch error.

PAUSE Axis pause.

Var KO One of the DNC inputs "SERVO DRIVER OK" is not(no longer) active (+24 VDC).

Jitter Error caused by the application of simultaneous edgeson the input encoder signals (can be provoked by aparasite, a fault in the encoder or a short-circuit on theencoder phases).


THE PRINTSCREEN FUNCTION

PRINT SCREEN TO THE PRINTER (OR ASCII FILE)

The DNC 70 authorizes, if the RS232 port is included (optional), to print thecontent of a page displayed on the screen.

This allows, trough a hardcopy, to retain information regarding theproduct(s), tools or machine parameters.

To be able to send this information to the printer, it is compulsory that youuse a serial printer (RS232).

You have to program the DNC 70 transmission parameters to the printer'srequired specifications.

Baud rate: 4800 max.

Bits: 7 or 8

Stop bits: 1, 2 etc.

Parity: 1 or leave blank

Protocol : this field defines how many DNC's pages you want to haveon one printer's page. After the relevant number the DNCsends a form feed character.Example: 1 = 1 DNC's page per printer'spage.

2 = 2 DNC's pages per printer's page, etc.

BCC: this field defines the left margin in cm.left margin = 2 + (BCC x 2)

valid range: 0 (2 space characters) to 9 (20 space characters)

Example: BCC = 4, then 2 + (4 x 2) = 10

TO PRINT FROM THE DNC 70

! Select the relevant page.

! Simultaneously press the STOP, and CORRECTION or MENU keys.

On earlier software releases, the LARGE MINUS and MENU keys must beused.

DNC 70 GRAPHIC PAGE 91

THE DNC 70 GRAPHIC

GENERAL REMARKS

The programming and the use of the DNC 70 Graphic is fundamentally thesame as the DNC 70 non-graphic.

In this chapter, we will be dealing only with the particularities of the DNC 70Graphic.

The differences:

page

This page has an extra selection named"CALCULATION CRITERIA". Because ofthis, the numbering is displaced in comparaisonwith the DNC non-graphic.

PUNCH/DIEprogr. page

This page is displayed in graphic mode and hasmore information for tool definition.

CALCULATION.CRITERIA

This page allows the definition of thesimulation criteria.

pagePressing twice allows to visualize the graphicprofile of the product (see chapter"Programmation of a graphic product page"page 93).

page

Pressing three times allows to visualize thebending being executed in the N sequence ingraphic mode.


PROGRAMMATION OF A GRAPHICPRODUCT PAGE

The programming procedure of a product is identical to the non-graphic DNC70 .

You program the profile by means of the PRODUCT STATUS page (1st press) to introduce the data according to the L_alpha method. See chapter"Programming on the PRODUCT STATUS PAGE" page 26.

Graphic product page or

This page displays the profile of a product and allows

a) Requesting a complete simulation (simulate __) that is to say theDNC calculates the order of bends and gauging points in accordancewith the programmed criteria

b) Requesting a partial simulation (simulate 1) that is to say the operatordictates one or more bends and gauging points and the DNC orders therest.

c) Requesting a reduced simulation (simulate 0) that is to say theoperator dictates all the bends and gauging points. This simulationmethod will check whether the product is likely to touch the toolsduring the bending process. If so, the DNC will display thecorresponding message.

All these simulations can be made with (or without) the criteria being visibleon the page "CALCULATION CRITERIA"Bends dictated by the operator have absolute priority over programmedcriteria, thus for SIMULATE 0 no criteria is active.


The following product will be used for the different examples

The following tooling will be used for the different examples.

-- upper tool--

h 155.00 p 30°Ton/m 200 rp 1.5

--lower tool --

V 16.0 d 30°h 100.00 rd 1.5Ton/m 200security X 9.0

/ .REF Y 255.00 / .

--- tool dimension--- -- upper tool

--a:100 b: 75c: 25 d: 38e: 22 f: 20g: 15 k: 10 -- lower tool

--a:140 b: 800c: 15 d: 15e: 50 f: 50g: 80


The programmable fields are as follows:

PRODUCT as for all pages, permits search, storing or deleting of aproduct in the cassette

N/L ALPHA permits, with 1 programmed, another mode of input ofbends and gauging points (see explanations later in thetext)

CRITERIA permits direct programmation of one of the criteria ofrotation frompage "CALCULATION CRITERIA"

L tolerance (L/ )permits selection of the leg which requires lessaccuracy

Bend N 1 leg 0Bend N 2 leg 5Bend N 3 leg 2Bend N 4 leg 5

The example below is identical except L tolerance is not programmed.Gauging point of bend 2 has changed.

Bend N 1 leg 0Bend N 2 leg 1Bend N 3 leg 2Bend N 4 leg 5


L alpha Indicates the number of the leg selected by the

graphic cursor ; when the keys and areused the cursor moves along the length of theproduct and the figures shownin the field correspond with the figure under thecursor. It is possible to program the field bypositioning the cursor on the introduced leg length(remove the cursor from this field to validate).

BEND N Indicates the bend number which corresponds to theL-Alpha length of the field described above. Thegraphic cursor simultaneously settles on the bend inquestion.If the field is empty this means that the bend has notyet been defined and it remains to be defined by acomplete simulation or imposed by a partial orreduced simulation.

GAUGINGPOINT

Indicates the face of the product which must be heldagainst the backgauge to make the bend in question.If the field is empty this means that the gauging pointhas not been defined and it remains to be defined bya complete simulation or imposed by partial orreduced simulation.The sketch below illustrates the backgauge positionon gauging points 0, 1 and 2.The figure which indicates an overall length L is notin the center , the shorter part is where thebackgauging takes place.

gauging 2

gauging 0

gauging 1


Below are several possiblilities. The number of the bend does not alwaysfollow the order of legs

SIMULATE Allows, when the cursor is placed in this field and

the key , is depressed, to request:

a) complete simulation if the field is notprogrammed. That is to say the DNC searchesfor an effective solution for making the product,will provide the order of bends and thenecessary gauging points. If any criteria areprogrammed, the DNC takes these into account.

b) partial simulation if the field is programmedto 1. That is to say the operator has dictated oneor more bends and one or more gauging points.The DNC searches for a solution to include thebends and gauging points which are notprogrammed.

c) reduced simulation if the field is programmedto 0In this case all the bends and gauging pointsmust be dictated. The DNC simply verifieswhether the product is feasible with theprogrammed tooling. If this is not the case theDNC signals an error message.

For these 3 simulations, the DNC also calculatesbackgauge positions (see X Y page).


Example of complete simulation

! Use the tooling and product described at the start, of this chapter.

! Go straight to graphic product page. The DNC displays this page:

! No criterion should be programmed except on page "CALCULATIONCRITERIA" the criterion "No stop against alpha > 90°" whichshould be set at 1

! Place the cursor on SIMULATE (field unprogrammed) and press

the key The DNC indicates RUN in the interactive zone.When the simulation is finished the DNC indicates EXECUTED andthe field BEND N and GAUGING POINT are programmed.The field SIMULATE is forced to 0 automatically after eachsimulation to protect BEND N and GAUGING POINT data in case ofaccidentally pressing SIMULATE again.

This page is then shown on the screen:


! On pressing the following pages appear:

! Each of the pages shows, for the bend upon which the graphic cursoris placed, the L_alpha length number and the corresponding leg.

! Now it is possible to move to the graphic sequence pages to visualisethe bending of the product.


! If, at this stage, the operator wishes to carry out a simulation withcriteria it is only necessary to:

- program the desired criteria by using page "CALCULATIONCRITERIA" or directly in the CRITERIA field

- clear the SIMULATE (__) field

- press the key

A new simulation is then provided, which does not take into account thebends and gauging points previously found, but recalculates everything to suitthe imposed criteria.

! It is interesting on this product to program one by one no criteria thencriteria 0,1,2, and 3 and see the different solutions found for eachsimulation.

! For a product comprising numerous bends and/or criteria, it isadvisable to enter some of these to reduce DNC calculation time (seethe next chapter - partial simulation).

! When a simulation must be interrupted, it is only necessary to press

the stop key .


Example of partial simulation

! Use the tooling and product described at the start of this chapter.

! Go straight to the graphic product page and the DNC displays thispage.

! No criterion must be programmed except on page "CALCULATIONCRITERIA" the criterion "No stop against alpha >90° which shouldbe set at 1.

! The operator wishes to dictate the first two bends as follows :


! This gives the shape of the product:

! Place the cursor on the field BEND N then press key until thegraphic cursor settles on the angle which is to be bend number 1 (inthis example).

! Then programme 1 into BEND N, then 5 into LEG field

"

! Move onto the next bend


! Programme 2 into BEND N and 5 into leg field

! Place 1 in SIMULATE and press the key

! The simulation will be the same as for a complete simulation forunprogrammed fields. That is to say the free fields and criteria will beincluded in the calculations.

! It is not vital to program first bends, no matter which bends can bedictated.Neither is it vital to program the gauging faces for the bends which aredictated. The DNC will calculate missing values.

! For a product comprising numerous bends and/or criteria it isadvisable to enter as many as possible to reduce DNC calculation time.

Reduced simulation

! This simulation is used when all the bends and gauging points aredictated. It is needed to discover if the product is feasible and tocalculate the backgauge positions.The DNC indicates on the interactive field if the product fouls thetools and at which point.

! It is also used to verify the feasibility ,and to correct the backgaugepositions when an existing, feasible product requires to be modified(different lengths for example). In this case the DNC will maintain theorder of bends and gauging points previously found.

! If during simulation, complete or partial, the DNC indicates that aproduct is UNFEASIBLE it is sometimes advisable to dictate bendsand gauge points and make a reduced simulation. The DNC will thenindicate precisely the problem areas.


Programmation of bends using N/Lalpha = 1

! When the field is programmed to 1 the fields Lalpha and PLI N areswapped.The field BEND N is already programmed at 1. The bend number

changes when you depress the key .Thereafter, the L_alpha length and its corresponding leg can beentered for each BEND N.

Example:

CRITERIA FOR BENDING CALCULATIONS

! This page is an aide-mémoire of criteria available for execution ofbending calculations.It is possible to program these directly into the graphic product page inthe CRITERIA field.

Exceptions : - max. length against operator- No stop against alpha > 90°

! The criteria are divided into two distinct groups

a) criteria for rotations of the productb) criteria of gauging points and other peculiarities of the products


! The selection of rotation criteria is made by programming in the field -,0,1,2 or 3 in the appropriate criteria section.

! To use one or more of the criteria of gauging point and productpeculiarities it is only necessary to enter 1 in the appropriate criteriasection.

a) Rotations

5 possibilities are offered

- none (no criteria)The DNC takes the first solution it finds regardless of anyrestraints

0 mini returnThe DNC seeks the solution which involves the minimum ofrotations on the horizontal axis

1 mini turnThe DNC seeks the solution which involves the minimum ofrotations on the vertical axis.

2 mini return + (turn) = turnoverThe DNC seeks a solution involving the minimum of returns andpivotments but giving priority to the minimum of returns

3 mini turn + (return) = turnoverThe DNC seeks a solution involving the minimum of pivotmentsand returns but giving priority to the minimum of pivotments

Sheet Metal Manipulation


b) Criteria of gauging points and other product peculiarities

max length against operatorThe DNC seeks a solution where the maximum material is againstthe operator.Used in conjunction with other criteria the DNC seeks solutionswhich use all criteria.

No stop against alpha > 90°If this criteria is programmed to 1 the DNC prevents the followingsituation

and will permit only the following situations

- SIMULE _ Can be 0 or 1 or _

or CALCUL Allows to define the calculation mode according to whatis desired and according to the imposed bendsintroduced before simulation.

3 possibilities are offered

0 is used when all the bends and gauging points of a product have beenentered during programming or when a result obtained is satisfactory but it isnecessary to modify one of the angles or leg lengths.In this case, the DNC will calculate only the feasibility of the product. Tocarry out a simulation 0 it is mandatory that all bends and legs beprogrammed.After requesting any simulation mode (_,0,1) the DNC automatically returnsto 0 for security. If another mode is required it is necessary again to enter thedesired mode in the field.


1 is used when the operator has programmed some of the bends and gaugingpoints but not all. In this case the DNC calculates the data and items whichare missing.When a product has more than 6 or 7 bends it is advisable to enter as manybends and gauging points as possible to reduce DNC calculation time.

_ is used when the operator wants the DNC to do all the work of simulationand ordering of bends, gauging points and criteria. If, after a solution is foundby the DNC, the operator wishes to modify it, he can simply enter _ and

repeat the calculation .The DNC recalculates entirely the order of bends and gauging points withoutreference to the earlier solution..

ERROR MESSAGES ON GRAPHIC PRODUCT PAGE

P. unfeasible This message only appears during complete (_) orpartial (1) simulations and indicates that the DNC isunable to find a solution to the programmed products . Itis then necessary to dictate the order of bends andgauging points (see chapter on reduced simulation) or toreduce the criteria entered.

1,2,5 A series of figures appear in the interactive zone onlyduring a partial simulation and signify that the last benddictated by the operator will not permit execution of theproduct ; it tells him the legs which are possible for thelast bend.

N3 P+f This message indicates that for bend number 3, theproduct fouls the punch on the inside of the machine (+)in the zone f of the punch (f corresponds to a dimension

of the tool seen on the page ).

N 3 P + f

letter = the dimension (shown on the tooldrawing) against which fouling is occuring

+ = inside press- = outside press

P = PunchM = DieA = Punch angle zoneV = Vee

Bend Number


ERROR This message appears during attempts to make reducedsimulation (0) and signifies that not all bends andgauging points are programmed.

RUN indicates that the DNC is making its calculations :during this time the DNC will not accept any keyboardentries.

ABORT This indicates that an interruption in the simulation by

key has been acknowledged and that the DNC isnow under the control of the operator.

Other messages, not specifically related to the Graphic page, are described inthe annex under "Interactive Zone".

INDEX PAGE 109

INDEX

#

,29, 82

d,55

MES,82

p,55

A

ABORT,108

Adda bend,32

ADVANCED PAGE,19

ADVANCED SEQUENCE,19

Al,28

AUTOMATIC,17

B

BEND N,96

Bend(s)add,32delete,32

Bendingbottoming,80

BIPcasing,60

Buffer,14

C

CAL,27

CALCULATE,18

Calculates the order of bends,93

Calculation,32

CALCULATIONS CRITERIA,104

Calibration,77

Character(s),86alphanumerical,86

CLEAR,18

CODE,27

COMPLETE,85

COR N,82

COR P,82

CORRECTION,17

CP,43, 44, 48

Cr,43

CR,30, 34, 42, 78

Criteria,50

CRITERIA,50, 95, 100

CY,42

CYBACK,60

Cyclewithout bend,44

D

Datumof an axis,76

Delete,31a die,58a punch,57an order,86

Deletea bend,32

DELETE,18

Dev L,28

DIE,55

Die(s),28, 53, 54delete,58linear force,55modify,58

DNC 70 GRAPHIC,91

E

Empty,31

ERROR,108

Error messages,107

EXECUTION CODE,67

EXISTS,31

INDEX

F

F,29

F1,43

F5,43

FACE,34

Face(s),26modify,32

forcelinear,55

Forcelinear,55

G

GAUGING POINT,96

Graphic,91, 107

H

hd,55

hp,55

I

I/mm,27

IBM PC,60

Ideal curve,30, 34, 42

Ideal curves,30

Index,109

Initialize,21

K

Key,20, 67

Keyboard,16

Kg/mm2,28

L

L,29

L alpha,96

L tolerance,95

L/,95

Lalpha,93

LEG,34

LEGS,33

LINK70,60

LISTPRODUCT,16

LISTOF DIES,26OF PUNCHES,25

Lmat,28

Lmax,43

M

Machine parameters,15, 21, 59

Manipulation,105sheet metal,37

MANUAL,17

Max length against operator,106

Memorization,18

Memory,14buffer,14internal,14internal cassette,14work memory,14

Memory boardSRAM,15

Memory zone,67

MENU,16

messageCOMPLETE,85

Messageinteractive messages,87

MessageEXISTS,31, 33

mini return,105

mini turn,105

Mode,17working,65

Modifya die,58a punch,57

N

N,27, 33, 34, 42

N/L ALPHA,95

N/Lalpha = 1,104

INDEX

N3 P+f,107

No stop against alpha > 90°,98, 106

O

Orderdelete,86save,85

P

P,27, 33

P. unfeasible,107

p/d,28

P+,27

PAGE BACKWARDS,19

Pair,28

Print Screen,90

PRODUCT,16

PRODUCT STATUS,26, 31, 93

Product(s),59programming,25

Production,83

Profile,26

programming,25product(s),25

PROGRAMMING,17

PUNCH,55

Punch / die pair(s),53

Punch(es),28, 53angle,55linear force,55

Punches / Dies,54

Punching,80

Q

Q,43

R

RAM,14

rd,55

REF Y,55

Reference,69

ri,29, 42, 78

rp,55

RUN,108

Rx,43

S

S.S.,28

SAF X,55

Safety,73, 87

SafetyX,55

Save,31

Savingan order,85

SEARCH,18, 50

SEMI-AUTOMATIC,17

SEQUENCE,17, 41

Sheet metalmanipulation,37

Sheet Metal Manipulation,105

SIMULATE,97

Simulate __,93

Simulate 0,93

Simulate 1,93

Simulation,35complete,98partial,101reduced,103

Simulation criteria,91

SP,43

St,28

START,19

STOP,19

Storage,60

STORE,18

T

Td,43

TDC,43

Th,28, 42

Time,85working,85

INDEX

To search fora product,50

TOL,30, 78

TON,43

TON/m,55

Tooling,53

Transfer,59

turnover,105

U

UNFEASIBLE,103

V

Vd,55

Vy ,43

W

Warranty,III

Work memory,14

Y

Y1 and Y2 fields unprogrammed,80

dnc 70 ps (g)

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