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I nstruction ManualGebrauchsanweisungMode d'emploi

II Struers .

Instruction ManualPedemin-2

In technical enquiries and in orders for 1. Descriptionspare parts, please state apparatus No.and voltage (see cover).All information and data in this 2 T h .

I dInstruction Manual were valid when it . ec nlca atawas printed. The Struers policy being,however, to make current improvementsof our products, we reserve ourselves the 3. Accessoriesright to modify our products withoutnotice. Besides, we ask you to note thatthis Instruction Manual co~cerns 4 Contents of Packing caseapparatus and all accessones. .Consequently, it may happen that theManual mentions equipment which isnot of relevance for your purpose at the 5. Installationpresent time.

5.1 Mounting of specimen holder plate

5.2 Mounting on polishing machine

5.3 Connection to power

6. Operation6.1 Insertion of specimen - Adjustment of load

6.2 Grinding on Petrodisc-M

6.3 Polishing

6.4 Hints

7. Maintenance

8. Trouble-Shooting

9. Spare parts (Appendix)

10. Illustrations (Appendix)

Struers A/SValh0js Aile 176

DK-2610 R0dovre/CopenhagenDenmarl<.. Telephone +45 31 708090

. Fax +45 31416544

Telex 19625

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1. Description

1.1 Working principle

Pedemin-2 is a specimen mover for the preparation ofmetallographic and mineralogical specimens.

Pedemin-2 is designed for mounting on a polishing machine with a200 mm polishing disc (Petrodisc-M: 175 mm), usually StruersDAP- V or DAP- 7. Pedemin-2 has a specimen holder plate, in which1, 2, or 3 specimens can be inserted without clamping.

Load is applied to the individual specimens by adjustablespringloads. The specimen holder is positioned eccentrically overthe polishing disc, rotating in the same direction as the disc, atapproximately 110 rpm.

For grinding with Pedemin-2, Petrodisc-M with Struers diamondspray is used. Polishing is performed on polishing cloths with

l Struers diamond spray or with diamond paste (DP-Spray, DiamondPaste - High Quality, Diamond Paste - Standard Quality).

1.2 Design

A gear motor drives a shaft (fig. 3.2) on which the specimen holder .,plate is mounted. The specimen holder plate (fig. 3.1) is easilyexchanged (see below) to suit various specimen diameters. Threespring loaded thrust pads (fig. 1.5) apply adjustable load on thespecimens. The pressure is varied by turning the screw (fig. 1.6).The lines on the rotating casing (fig. 1.4) indicates the load.

Pedemin-2 is tilted back for changing of grinding and polishing disc.ir A lubricator (fig. 1.8) provides the necessary supply of lubricant.

The amount of lubricant is adjusted by the needle valve (fig. 1.7).

An on/off switch (fig. 1.2) and a pilot lamp are located on the frontpanel. The pilot lamp will light up when the switch is "on".

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2. Technical data

Voltage/frequency 110-120 V, 50-60 Hz220-240 V, 50-60 Hz

Motor output 30 W

Current consumption 0.15 A/220-240 V0.3 A/110-120 V

The motor is equipped with a thermal switch for protection againstoverload.

Rotational speed 105 rpm at 50 Hz125 rpm at 60 Hz

Load per specimen Min. approximately 3 N, max. approx. 50 N

Dimensions Height: 300 mm (above polishing disc)Width: 150 mmDepth: 205 mm

Weight 8.5 kg

Safety standard lEC 204-1EN 60204-1

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3. Accessories Code word

~ Specimen holder plates are avaUable for thespecimen sizes mentioned below and have to beordered separately according to requirementFor 3 specimens, 25 mm or I" ilia. PEMFIFor 3 specimens, 30 mm dia. PEMTE~ " dejw /.41,..1 #For 3 specimens, 11/4" ilia. --"~ "-- -,.,. PEMQU

J. ~U For 3 specimens, 11/2", dia. PEMNAFor 3 specimens, 40 mm dia. PE:MYF

Struers offers a comprehensive range of consumables for both planeand fine grinding. Ask for separate leaflets.

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Instruction Manual "IIPedemin-2

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4. Contents of packing case j

1 Pedemin-2 complete :!

1 Lubricator complete1 Screwdriver for securing the specimen holder plate1 Hexagon-key 2.5 rom for adjusting the turning friction of the

thrust pad screw3 Extra screw M 4 for securing the specimen holder plate.2 Counter nuts, M 161 Template for mounting holes in Rotopol1 Socket spanner, 24 rom3 Washers, 1 rom3 Washers, 3 rom1 Cable clamp, hose piece and screw for connection to a DAP

'; !, 1~ machine(if Pedemin-2 is required to start simultaneously with a DAP I

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~ Instruction ManualPedemin-2

I 5. Installation

~ 5.1 Mounting of specimen holder plate. Tilt Pedemin-2 back into its top position. This is done by pushing

the pin to the right (fig. 2.7) with your right hand and then liftingthe handle (fig. 1.3) with your left hand.

'I Mount specimen holder plate on the shaft with the screw (fig. 3.3)

using the screwdriver.

5.2 Mounting on polishing machine

Pedemin-2 is usually mounted on DAP-V or DAP-7, but may also befitted on other polishing machines. In case of other models thisrequires a special column.

D Mount a specimen holder plate on Pedemin-2.

D Place a polishing disc, 200 mm dia. on the DAP-machine.

D Remove the nut and the spacing washers (fig. 4.2) from thePedemin-2 column. Remove the plastic plug from the DAP machine

'if and pass the column through the opening (fig. 1.1). Place theDAP-machine on its left side.

D The column must be held firmly against the bottom plate (fig. 7.1)~ while the distance h in fig. 5 is measured.

D The distance h should be about 2-2.5 mm. If h is too little, lift thecolumn out and fit a suitable number of spacing washers. When his correct, fit the washer and nut (fig. 7.2) and tighten the nut

. slightly.

I Before final tightening of the nut check the distance x (fig. 6). This[ distance should be:

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dia.

40 mm 1,5 mm

1Y2" 2,5 mm

1Y4" 6,0 mm

30 mm 6,5 mm

~ 25 mm 9,0 mm

! After determining the distance x tighten the nut firmly. The columnnow remains in this position.

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Then another nut is screwed on to ensure that the column remainsin the correct position.

Mount the lubricator (fig. 1.8) on the pin and pour blue or redlubricant in the plastic bottle.

5.3 Connection to power

Check that the voltage and frequency on the identification plate onthe rear side of Pedemin-2 corresponds with the local voltage.

If desired, Pedemin-2 may receive power separately from a wallsocket. For this purpose the cable has to be fitted with a suitableplug with earth connection. Yellow/green lead is earthed.

If you want Pedemin-2 to be powered and started by theDAP-machine, mount the cable with hose piece and clamp in the

i rear side of the DAP-machine. DAP- V and DAP- 7 machines areprepared for this (fig. 8.1).

When connecting Pedemin-2 to the models DAP-7 and DAP-V, theleads from Pedemin-2 is connected in the following way:

DAP.7/125 rpm D Brown to terminal 3 (or 7) of the speed-change selector.D Blue to terminal 10 (or 8) of the speed-change selector.

~ r-- D Yellow/green to yellow/green lead.

DAP-7/250 rpm D Brown to terminal 1 of the speed-change selector.D Blue to terminal 6 of the speed-change selector.D Yellow/green to yellow/green lead.

DAP- V D Brown to terminal 4 of the circuit board terminal strip X2.D Blue to terminal 3 of the circuit board terminal strip X2.D Yellow/green to yellow/green lead

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6. Operation

6.1 Insertion of specimen - Adjustment of load

The specimen must fit into the hole in the specimen holder platewithin about 1 mm. Insert the specimen by raising the thrust pad

f. .. (fig. 11.1); if the specimen is too high to pass under the foot, adjustY,c':¥i'~ the screw (fig. 11.2). The recommended specimen height is~!1~ !['f~.~-~ 15-20 mm.,;:;~&"-hn'a:4

r_;-;:toa_,:-;[~' After inserting the specimen in the specimen holder plate, adjust, -,~ the pressure. The pressure is indicated by the position of the small~ ,~::';!".~-c~ screw (fig. 13.1) and adjusted by turning the screw (fig. 13.2). With

the screw (fig. 13.1) in its lowest position under the lowest marker~\;,j ,':;.; i-J.ui:;; line (fig. 13.3) the load is about 3 N.

""""'" i ;-",.~ .cIn the other positions the load is (approximate values):

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Marker Loadline

1 5 N

2 15 N

3 25 N

4 35 N

5 45-50 N

The small screw (fig. 13.1) must not be raised above the 5th markerline.

X NB: Pedemin-2 should always be started after the polishingmachine has been started (or by the DAP).

Pedemin-2 is designed for rotating 1, 2, or 3 specimens~ simultaneously on a rotating polishing disc. Pedemin-2 must not

rotate on a stationary polishing disc.

When preparing 3 specimens at the same time make sure that theX load per specimen does not exceed 25 N. Bigger loads may cause

jamming of the polishing disc.

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6.2 Grinding on Petrodisc-M

Tilt Pedemin-2 back into its top position. This is done by pushingthe pin to the right (fig. 2.7) with your right hand and lifting thehandle (fig. 1.3) with your left hand. Now place Petrodisc-M

- f: r . (175 mm dia.) (fig. 12) and then take Pedemin-2 down again and it;,'.r "' "!")}J.~ is automatically locked.'6,} " c",0 "'P" :;.,t:, {, For Petrodisc-M is normally used Struers 6 Jlffi diamond spray, and

, the amount of lubricant is kept fairly low. The pressure on the

individual specimen will vary according to the size and material of'" ,- the specimen. Refer to preparation examples section 6.4.

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~il, ''J. - 6.3 Polishing

Place a polishing disc 200 mm dia. with polishing cloth on themachine. Use the same procedure as described above in section 6.2. E

Use Struers diamond spray or Struers diamond paste on Struerspolishing cloths. The pressure on the individual specimen will varyaccording to the size and material of the specimen.

6.4 Hints

The tables stated below indicates the preparation procedure for awide range of materials. If a given material is not included in thetable, it will often be possible to find a similar material, which maythen serve as a model.

In principle, all metallic, ceramic and mineralogical materials canbe prepared by means ofPedemin-2, mounted on DAP-V or DAP-7.If in doubt, please contact your local Struers representative orStruers directly.

NB: All preparation examples shown below are with Pedemin-2 ona DAP-machine.

Force on each sample is stated in figures 1 to 5. 1 is 1st markingline (approximately 5N), 2 is 2nd marking line (approximately 15N)etc., see section 6.1.

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Preparation examples

C-5teel

Step(s) Grinding 181 polishing 2nd polishingbefore step step step

\ Pedemln-2l Base SiC-paper Petrodisc-M DP-Mat DP-Nap

Grain size 220 6 Ilm spray 6 Ilm 1 !ln1

Lubricant Water Blue Blue Blue

Speed rpm 300 125 125 125

Force By hand 3 (25N) 2 (15N) 2 (15N)

Time, min Y2-1 5-7 4 2-3

Brass, Bronze

Step(s) Grinding 181 polishing 2nd polishingbefore step step stepPedemln-2

Base SiC-paper Petrodisc-M DP-Mol DP-Mol

Grain size 320 6 Ilm spray 3 Ilm 1 Ilm

Lubricant Water Blue Blue Red

Speed ~m 300 125 125 125

Force By hand 2 (15N) 2 (15N) 2 (15N)

Time, min Y2-1 5 4 3

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Preparation examples Pre par

Stainless steel to'

Step(s) 181 polishing 2nd polishing 3rd polishingbefore step step stepPedemln-21

Base SiC-paper Pan-W Pan-W OP-Chem

Grain size 320-500- 6 ~m 3 ~m CpoS pure1000-1200

;;;;;;;;:::;:::;::::::::'::::::::::::::::::::::::::::::::::::::::i::::::::::Lubricant Water Blue Blue ;i::::::::::::::~:::::i!:j:j~~:i:::::::i::::::::i:!::ij:!iji!::i:i:::::::::

Speed rpm 300 125 125 125

l Force By hand 2 (15N) 2 (15N) 2 (15N). .", :~~i1 Time, min Y2 each step 5 3-5 1-2/

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Printed circuit board (layers), 30 mm dia. embedding

Step(s) 181 polishing 2nd polishing 3rd polishingbefore step step stepPedemln-2

Base SiC-paper Pan-W DP-Nap OP-Chem

Grain size 220-1200 6 ~m 1 ~m OP-U

Lubricant Water Blue Blue

Speed rpm 300 125 125 125

Force By hand 3 (25N) 2 (15N) 1-2 (5-15N)

Time, min Y2-1 5 3 1

1 4 grinding steps by hand before Pedemin-2

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Preparation examples

Cast Iron

Step(s) Grinding 181 polishing 2nd polishing ~ polishingbefore step step step stepPedemln-2

Base SiC-paper Petrodisc-M Pan-W Pan-W OP-Chem

Grain size 220 6 Ilm spray 6 Ilm 3 Ilm OP-Ui:~:~:~:~:~:::::~:~:::~i:~:~:~:::::~;::~:~:~;~:~:~1:~:~;::~:~:::::~:::~:::Lubn"cant Water Blue Blue Blue ..::.:.:.::.:.:.:.:.:v:.:.::.:,:,:,:,:.:,:.:.:.:.:.:;:'::':':.:':':'. :;~:~:~;~:~;~:~:::;;ji:~:~:~:~:~:;~:~:::~:;~:~:~:~:~:::::~:~:~:~:;:::

Speed rpm 300 125 125 125 125

Force By hand 3 (25N) 3 (25N) 3 (25N) 2 (15N)

Time, min 1-2 5-7 5 5 1

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Aluminum, Copper and its alloys

Step(s) 181 polishing 2nd polishingbefore step stepPedemln-21

Base SiC-paper DP-Mol OP-Chem ]) p- r\) P1-fJ

+Grain size 320-500- 3 Ilm OP-U

1000-4000 S1 l- c. (.JV.,V.vv.'v.'.v.v,.v.v.v.,v,v.v,'v.'.....,.., ".,..." .:.::',,:.:::::':.::.:::.:.::::.:':.::.:.:: :.:::.:.:.::

Lubricant Water Red :::::::::::::::::~:::::~:::::::::::::::::::::~:::::::~:~:~~~::::~~::::::::::: \\"

Speed rpm 300 125 125

Force By hand 3 (25N) 2 (15N)

Time, min 112 each step 5 2

1 4 grinding steps by hand before Pedemin-2

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Instru~ti~n Manual ~Pedemm 2 ~

7. Maintenance

7.1 Cleaning/Lubrication Error

Pedemin-2 is designed for many years of daily operation and, apart Motorfrom general cleaning, requires no special maintenance. overlc

lights.Lubrication Lubricate the hinge monthly with a few drops of oil.

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I7.2 Adjustment of screw friction Vibrat

The screw (fig. 14.2) must not turn too easily, in case it specirturns itself down involving a risk of damage to the polishing disc. plate.

The necessary thread friction is generated by a soft nylon pin Specillocated behind the screw (fig. 14.1). By turning this screw with the prepalHexagon-key the friction may be varied. differs

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8. Trouble-shooting

Error Cause Action

Motor stops, Motor overloaded and the thermal switch Let the motor cool for aboutoverload lamp has switched off the system. Y2 hour. Restart by firstlights. pushing the power-button to

position "0" (OFF) and afterthat to position "1" (ON).

Vibration in the Pressure feet worn. Replace pressure feet.specimen holderplate.

Specimens The adjusting screw (fig. 14.2) turns by Increase the friction byprepared itself. This causes differing pressures. turning the screw (fig. 14.1).differently. Replace the soft nylon pin if

needed.

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