Duerkopp Adler 868 Betriebsanleitung

868

Spezialnähmaschine

Serviceanleitung

Service Instructions

Postfach 17 03 51, D-33703 Bielefeld • Potsdamer Straße 190, D-33719 Bielefeld

Telefon +49 (0) 521 / 9 25-00 • Telefax +49 (0) 521 / 9 25 24 35 • www.duerkopp-adler.com

Ausgabe / Edition: Änderungsindex Teile-Nr./Part.-No.:

01/2009 Rev. index: 00.0 Printed in Federal Republic of Germany 0791 868641

Eigentum der Dürkopp Adler AG und urheberrechtlich geschützt. Jede, auch auszugsweise Wiederverwendung

dieser Inhalte ist ohne vorheriges schriftliches Einverständnis der Dürkopp Adler AG verboten.

Property of Dürkopp Adler AG and copyrighted. Reproduction or publication of the content in any manner, even

in extracts, without prior written permission of Dürkopp Adler AG, is prohibited.

General safety instructions

The non-observance of the following safety instructions can cause

bodily injuries or damages to the machine.

1. The machine must only be commissioned in full knowledge of the

instruction book and operated by persons with appropriate training.

2. Before putting into service also read the safety rules and

instructions of the motor supplier.

3. The machine must be used only for the purpose intended. Use of

the machine without the safety devices is not permitted. Observe all

the relevant safety regulations.

4. When gauge parts are exchanged (e.g. needle, presser foot, needle

plate, feed dog and bobbin) when threading, when the workplace is

left, and during service work, the machine must be disconnected

from the mains by switching off the master switch or disconnecting

the mains plug.

5. Daily servicing work must be carried out only by appropriately

trained persons.

6. Repairs, conversion and special maintenance work must only be

carried out by technicians or persons with appropriate training.

7. For service or repair work on pneumatic systems, disconnect the

machine from the compressed air supply system (max. 7-10 bar).

Before disconnecting, reduce the pressure of the maintenance unit.

Exceptions to this are only adjustments and functions checks made

by appropriately trained technicians.

8. Work on the electrical equipment must be carried out only by

electricians or appropriately trained persons.

9. Work on parts and systems under electric current is not permitted,

except as specified in regulations DIN VDE 0105.

10. Conversion or changes to the machine must be authorized by us

and made only in adherence to all safety regulations.

11. For repairs, only replacement parts approved by us must be used.

12. Commissioning of the sewing head is prohibited until such time as

the entire sewing unit is found to comply with EC directives.

13. The line cord should be equipped with a country-specific mains

plug. This work must be carried out by appropriately trained

technicians (see paragraph 8).

It is absolutely necessary to respect the safety

instructions marked by these signs.

Danger of bodily injuries !

Please note also the general safety instructions.

Contents Page:

Service Instructions Class 868

(Edition 01/2009)

1. General notes

1.1 Gauges..................................................... 3

1.2 Descriptionofthelockingpositions.................................... 6

1.3 Graduation on the handwheel ....................................... 7

2. Sewing machine

2.1 Positionofthearmshaftcrankonthearmshaft............................ 8

2.2 Upper and lower toothed belt wheel / toothed belt ........................... 9

2.2.1 Position of the upper toothed belt wheel ................................. 9

2.2.2 Position of the lower toothed belt wheel ................................. 10

2.3 Bottom feed and stitch regulator gear .................................. 11

2.3.1 Basicsettingofstitchadjustment..................................... 11

2.3.2 Adjusting the 2nd stitch length....................................... 13

2.3.3 Positionoftheadvanceshaft ....................................... 14

2.3.4 Feed gear basic setting ........................................... 15

2.4 Needle bar linkage .............................................. 16

2.4.1 Align the needle bar linkage laterally ................................... 16

2.4.2 Transmissionlever.............................................. 17

2.4.3 Threadlever ................................................. 18

2.5 Postbedfeed................................................. 19

2.5.1 Aligningthepostbedfeed......................................... 19

2.5.2 Feeding motion of the feed dog ...................................... 20

2.5.3 Liftingmotionofthefeeddog ....................................... 21

2.5.4 Feeddogheight ............................................... 22

2.5.5 Balanceweight................................................ 23

2.5.6 Needle penetration in feeding direction ................................. 24

2.6 Hook, looping stroke and needle bar height............................... 25

2.6.1 Hookheight.................................................. 25

2.6.2 Looping stroke ................................................ 27

2.6.3 Needle bar height .............................................. 28

2.6.4 Distance between hook and needle.................................... 29

2.6.5 Needle guard ................................................. 30

2.7 Bobbin case opening ............................................ 31

2.7.1 General .................................................... 31

2.7.2 Setting of the bobbin case opening .................................... 31

2.7.3 Timing of opening .............................................. 33

2.8 Feeding foot and presser foot ....................................... 34

2.8.1 Basic stroke gearing setting ........................................ 34

2.8.2 Feeding foot and presser foot stroke ................................... 36

2.8.3 Stroke motion of the feeding foot ..................................... 37

2.8.4 Sewingfootpressure............................................ 38

Contents Page:

2.9 Stitch length limitation ............................................ 39

2.10 Stitch equality of the forward and backward stitch ........................... 40

2.11 Sewingfootlifting .............................................. 41

2.11.1 Mechanical sewing foot lifting ....................................... 41

2.11.2 Height of the sewing feet arrested with hand lever........................... 42

2.11.3 Heightoftheliftedsewingfeet....................................... 43

2.12 Thread-guiding parts ............................................ 44

2.12.1 Thread regulator ............................................... 44

2.12.2Threadtake-upspring............................................ 45

2.13 Bobbin winder................................................. 46

2.14 Threadcutter................................................. 48

2.14.1 General .................................................... 48

2.14.2 Thread-pulling knife height ......................................... 49

2.14.3 Thread-pulling knife ............................................. 50

2.14.4 Swing range of the thread-pulling knife ................................. 52

2.14.5 Counter-knife and lower thread clamp .................................. 53

2.14.6Trimmingposition .............................................. 55

2.15 Potentiometerinthearm.......................................... 56

2.15.1 Basic setting without control panel .................................... 57

2.15.2 Basic setting with the control panel V810 or V820 ........................... 57

2.15.3Checkthepotentiometeradjustment................................... 58

2.16 Connections PCB .............................................. 59

3. Oil lubrication

3.1 Hooklubrication ............................................... 61

3.2 Maintenance ................................................. 62

1. General notes

The present service instructions describes the adjustment of the

special sewing machine 868.

ATTENTION !

The operations described in the service instructions must only be

executed by qualified staff or correspondingly instructed persons

respectively!

Caution: Risk of injury !

In case of repair, alteration or maintenance work turn off the main

switch and disconnect the machine from the pneumatic supply system.

Carry out adjusting operations and functional tests of the running

machine only under observation of all safety measures and with

utmost caution.

The present service instructions describes the adjustment of the

sewing machine in an appropriate sequence. Please observe in

this connection that various setting positions are interdependent.

Therefore it is absolutely necessary to do the adjustment

following the described order.

For all setting operations of parts involved in the stitch formation a new

needle without damage has to be inserted.

Machine covers having to be screwed off and on again for checking

and adjusting operations are not mentioned in the text.

Hint:

Some of the shafts of the special sewing machine 867 are provided

with flat spots. This facilitates the adjustment considerably.

In case of all adjustments on flat spots, it is always the first screw in

rotation direction that is put on such a flat spot.

1.1 Gauges

The locking pin 1 required for adjusting the machine belongs to the

serial equipment of the machine. It is in the accessories and can be put

at the bottom side of the oil pan.

Further gauges:

Setting gauge 0868 290113

chapter 2.4 Needle bar linkage

Setting gauge 0868 290153

chapter 2.5 Post bed feed

Setting gauge 0868 290163

chapter 2.5 Post bed feed

Setting gauge 0868 290184

chapter 2.3.3 Position of the advance shaft

Setting gauge 0868 290020

chapter 2.4.2 Transmission lever

Setting gauge 0868 290194

chapter 2.4 Needle bar linkage

chapter 2.5 Post bed feed

Auxiliary gauge 0667 295050

chapter 2.3.1 Basic setting of stitch adjustment

Notes:

1.2 Description of the locking positions

With the locking pin 1and the arresting grooves 2and 3in the arm

shaft crank 4the sewing machine can be arrested in two adjusting

positions.

Position I = Locking pin Ø5mmfor large groove

= Looping stroke, needle bar height

Position II = Locking pin Ø3mmfor small groove

= Needle bar at its upper dead centre, 0° on the

handwheel.

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