integrated register control
TRANSCRIPT
Principles of register control Camera system Closed loop control HMI – operating and observing Example Basics Register adjustment Controller structure
Principles of color printing What is the register ?
Copyright © Siemens AG 2008. All rights reserved.
Integrated register control Principles of color printing
Slide 2 Integrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Application in:
Rotogravure printing Offset printing
Flexographic printing
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 3 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Integration of the register-control in the motion control system Calculation of the register control algorithm processed by the drive controller Process-data directly monitored in the drive controller Corrective actuation transferred via internal interfaces with rather no delay time
+ accurate und efficient register control + suitable for all types of printing methods + customer specific solutions possible + open-interface of the register control system + no additional cabinets needed + no additional controller-components needed + integration of the register operation into the machine operation + individual size and geometrie of printing marks possible + production specific archiving and reusability
Characteristics
Characteristics
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 4 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Yellow, Magenta, Cyan, Black
Principles of color printing
1.DW 2.DW 3.DW 4.DW
Each printing couple applies one color on the printing material.
In multicolor printing the image is split into the basic colors Principles of color printing
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 6 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
What is the register ?
The color register in multicolor printing is the position match of the seperated colors relative to another.
register deviation without register control
register deviation with register control
What is the register?
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 7 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
What is the register ?
A register control system is needed to maintain the color register in the machine. Therefore each printing couple prints an additional information e.g. a printing mark. This printing mark is the basis for the register control system.
1.PU 2.PU 3.PU 4.PU
example for
printing marks
What is the register?
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 9 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Principles of register control
measurement
Visualization / Operation
printing marks
corrective actuation Sensor/ Camera
Calculation of register deviation control loop algorithm
Visualization of register difference Register control Corrective actuation
Measurement of register marks
register deviation
Principles of register control
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 11 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
parametrization
measured values
image data
intelligent camera-software
control- algorithm
corrective motion of the axis
Ethernet
Camera system
The camera system is the key component of the register control system The flash and complete analysis of the picture is implemented in the camera system
Camera integration in the SIMOTION - Controller
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 13 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Closed loop control
The closed control loop is realized in a SIMOTION Control Unit.
The integrated implementation is superior to existing systems.
The camera is directly connected to the Simotion controller. The register controller are interconnected by the
drive bus system.
disturbance i. e. from winder
Siemens Motion Controller Competitor
disturbance i.e. from winder
register error register error
Closed lool control
The controller structure and setup guideline was developed together with an university.
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 15 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
HMI - operating and observing
The operator interface can be integrated into the HMI system of the machine.
With a multi-user system the interface is available from any operator panel.
HMI – operating and observing
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 17 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Example – Configuration of a Rotogravure Press
SIMOTION D HMI
Ethernet
Example
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 19 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
ε1, σ1
R1
a2
v2 v1
ε2, σ2
Nip point 1 (infeed)
Nip point 2 (1.PU)
E
R2
a2 ... fixed lengh E ... elasticity module ε ... web stretch σ ... web tension v ... web speed
1.PU 2.PU 3.PU 4.PU Infeed
Basic mechanism of web transport
Basics
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 20 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
Nip Roller 2 Nip Roller 3 Nip Roller 1
Schematic diagram for register simulation
Basics
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 21 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
1.PU 2.PU 3.PU 4.PU Infeed
3700 3720 3740 3760 3780 3800 3820
0
0.2
0.4
0.6
0.8
web tension change at the infeed
regi
ster
[mm
]
time [s]
Y 12 Y 13 Y 14
disturbance
Simulation of a web tension change
Basics
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 23 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
3700 3720 3740 3760 3780 3800 3820 -0.4 -0.2
0 0.2 0.4 0.6 0.8
1 Comparison between Register Change (1mm) with Compensator Roller (RC) and Print Unit Drive (PU)
Regi
ster
[mm
]
time [s]
Y 12 PU Y 13 PU Y 14 PU Y 12 RC Y 13 RC Y 14 RC
Change Move 1mm/s
RC: Coupling by Length Change and Stretch PU: Coupling by Stretch RC: Register Change by Compensator Roller PU: Register Change by Print Unit Drive
Impact of Register Adjustments
PU 1 PU 2 PU 3 PU 4 Infeed
PU RC
Register adjustments
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 24 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 G2 L Register Error (ohne Entkopplung) (mm) G2 L Register Error (mit Entkopplung) (mm)
Sec
-1.25 -1.00 -0.75 -0.50 -0.25 0 G3 L Register Error (ohne Entkoplung) (mm) 1_G3 L Register Error (mit Entkopplung) (mm)
Sec
-0.9 -0.7 -0.5 -0.3 -0.1 0.1 G4 L Register Error (ohne Entkopplung) (mm) 1_G4 L Register Error (mit Entkopplung) (mm)
Sec 17:01:50 17:02:00 17:02:10 17:02:20 17:02:30 17:02:40
r
r
r
0 0.5 1.0 1.5 2.0 2.5 3.0 G2 L Register Error (ohne Entkopplung) (mm) G2 L Register Error (mit Entkopplung) (mm)
Sec
-1.00 -0.75 -0.50 -0.25 0 G3 L Register Error (ohne Entkopplung) (mm) 1_G3 L Register Error (mit Entkopplung) (mm)
Sec
-0.7 -0.5 -0.3 -0.1 0.1 G4 L Register Error (ohne Entkopplung)
1_G4 L Register Error (mit Entkopplung) (mm)
Sec 17:23:15 17:23:25 17:23:35 17:23:45 17:23:55
r
r
r
v = 200 m/min v = 100 m/min
PU 1 PU 2 PU 3 PU 4 Infeed
Impact of Register Adjustments
Register movement on PU2 is impacting the register of the following units Register influence without decoupling (register controller off) Decoupling function active (register controller off)
Register adjustments
Principles of color printing What is the register ? Principles of register control
Camera system
Closed loop control HMI – operating and observing
Example
Basics
Register adjustment
Controller structure
Slide 26 Intergrated register control Copyright © Siemens AG 2008. All rights reserved. Industry DT MC PM BR
pre-control &
decoupling register error measurement
decentralized drive concept with interconnected algorithm
register closed loop controller
Controller structure
Modular Controller Structure