DURKOPP ADLER 745-34 - Operating instructions

745 - 34 Speedpocket

Sewing unit for runstitching

of rectangular piped pockets

Operating Instructions

Installation Instructions

Service Instructions

Instructions for programming DAC

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.:

06/2007 Rev. index: 02.0 Printed in Federal Republic of Germany 0791 745171

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.

Foreword

This instruction manual is intended to help the user to become familiar

with the machine and take advantage of its application possibilities in

accordance with the recommendations.

The instruction manual contains important information on how to

operate the machine securely, properly and economically. Observation

of the instructions eliminates danger, reduces costs for repair and

down-times, and increases the reliability and life of the machine.

The instruction manual is intended to complement existing national

accident prevention and environment protection regulations.

The instruction manual must always be available at the machine/sewing

unit.

The instruction manual must be read and applied by any person that is

authorized to work on the machine/sewing unit. This means:

–Operation, including equipping, troubleshooting during the work

cycle, removing of fabric waste,

–Service (maintenance, inspection, repair) and/or

–Transport.

The user also has to assure that only authorized personnel work on the

machine.

The user is obliged to check the machine at least once per shift for

apparent damages and to immediatly report any changes (including the

performance in service), which impair the safety.

The user company must ensure that the machine is only operated in

perfect working order.

Never remove or disable any safety devices.

If safety devices need to be removed for equipping, repairing or

maintaining, the safety devices must be remounted directly after

completion of the maintenance and repair work.

Unauthorized modification of the machine rules out liability of the

manufacturer for damage resulting from this.

Observe all safety and danger recommendations on the machine/unit!

The yellow-and-black striped surfaces designate permanend danger

areas, eg danger of squashing, cutting, shearing or collision.

Besides the recommendations in this instruction manual also observe

the general safety and accident prevention regulations!

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.

Index Page:

Part 3: Service Instructions 745-34 Speedpocket

1. General notes................................................ 3

1.1 Gauges .................................................... 4

1.2 Grooveinthearmshaftcrank ...................................... 5

2. Sewing machine head

2.1 Raising the sewing machine head .................................... 6

2.2 Removing / Installing the sewing machine head............................ 8

2.3 Crankpinatthearmshaft......................................... 10

2.4 Needle bar linkage ............................................. 13

2.4.1 Removing the needle bar linkage .................................... 13

2.4.2 Removing a needle bar from the linkage ................................ 15

2.4.3 Disassembly of the needle bar ...................................... 16

2.4.4 Assembly of a needle bar ......................................... 16

2.4.5 Installation of the needle bars in the needle bar linkage ....................... 17

2.4.6 Installation of the needle bar linkage .................................. 19

2.4.7 Height of the needle bar linkage ..................................... 21

2.4.8 Aligning the needle bar linkage to the throat plate .......................... 22

2.4.9 Exchanging the needle holder ...................................... 23

2.5 Hook...................................................... 24

2.5.1 Hookshaftheight.............................................. 24

2.5.2 Adjusting the gear clearance of the hook drive ............................ 25

2.5.3 Looping stroke................................................ 26

2.5.4 Height of the needle holders ....................................... 27

2.5.5 Distance between hook tips and needles ................................ 29

2.5.6 Needle protection .............................................. 31

2.5.7 Exchanging the hook ............................................ 32

2.5.8 Bobbin case holding wire ......................................... 33

2.6 Centerknife................................................. 35

2.6.1 Removing / Installing the driving motor ................................. 35

2.6.2 Removing / Installing the switching cylinder .............................. 36

2.6.3 Adjustingtheknife ............................................. 37

2.7 Threadcontrollerspring.......................................... 39

2.8 Trimming and clamping device for the needle threads ........................ 40

2.8.1 Function ................................................... 40

2.8.2 Exchanging knife and thread catcher .................................. 41

2.9 Trimming and clamping device for the hook threads ......................... 43

2.10 Thread puller for the needle threads................................... 46

2.11 Synchronizer................................................. 47

2.12 Oillubrication................................................ 48

2.12.1 Hooklubrication............................................... 49

Index Page:

3. Transport carriage

3.1 Rearendposition.............................................. 51

3.1.1 Positionofthelimitswitchintheslottedhole ............................. 53

3.1.2 Distancebetweenswitchingscrewandlimitswitch.......................... 53

3.1.3 Stopguidefortransportcarriage..................................... 53

3.2 Changing the toothed belt ........................................ 54

3.3 Adjustingthebelttension......................................... 55

4. Feeding clamps

4.1 Measuring line for aligning the feeding clamps and the folder ................... 56

4.2 Aligning the feeding clamps as to the auxiliary line .......................... 57

4.3 Feeding clamp stroke ........................................... 58

4.4 Distance between the feeding clamps and the folder sole ...................... 59

4.5 Front end position of the feeding clamp................................. 60

5. Knives for corner incision

5.1 Presetting .................................................. 61

5.2 Aligningthecornerknifestationastotheseams........................... 62

5.3 Adjustingtheslantofthecornerincisions............................... 64

5.4 Exchanging the corner knives ...................................... 65

6. Laser markings............................................... 66

6.1 Aligningthemarkings ........................................... 67

7. Reflected light barriers for flap scanning

7.1 Swivelarm.................................................. 68

7.2 Aligningthelightbarriers ......................................... 69

8. Aligning the folding station plate as to the measuring line ................... 70

9. Positioning the sewing machine head as to the table top .................... 71

10. Folder

10.1 Proper fastening............................................... 72

10.2 Aligning the folder as to the middle of the pocket opening...................... 73

10.3 Liftingmotionofthefolder......................................... 74

10.4 Position of the folder to the needles ................................... 76

10.5 Guideplatesatthefolder......................................... 77

11. Stacker

11.1 Positionofthepincerstothetabletop ................................. 78

11.2 Heightofthepincer............................................. 78

11.3 Positionandclosingofthepincers.................................... 79

11.4 Cylinder speed ............................................... 80

11.5 Positionoftherestplate.......................................... 80

11.6 Swivellingthestackeraside........................................ 81

12. Exchange the control unit ........................................ 81

1. General notes

The service instruction manual on hand describes the setting of the

sewing unit 745-34 in an appropriate sequence.

ATTENTION !

Some of the setting positions are interdependent.

Therefore it is absolutely necessary to carry out the individual settings

following the described order.

The operations described in the service instructions must only

be executed by qualified staff and correspondingly instructed persons

respectively!

Danger of breakage !

Before the sewing unit is put into operation again after having been

disassembled the necessary adjustments have to be carried out

according to the service instructions.

Before any adjusting operations of parts involved in the stitch

formation are made:

–Insert a new needle without any damage.

Caution: Danger of injury !

Before repair, converting and maintenance work is done:

–Switch the main switch off and disconnect the sewing unit from the

pneumatic supply system.

Exception:

Adjusting operations carried out with the help of test or setting

programs.

Adjusting operations and function tests when the sewing unit is

running

–Carry out adjusting operations and function tests of the running

sewing unit

only under observation of all safety measures and with utmost

caution.

Adjusting operations in the needle zone

–Parts which can lead to injuries have to be removed before carrying

out the adjusting operations.

Exception:

The parts are absolutely necessary for the adjusting operations.

1.1 Gauges

The gauges listed below allow a precise setting and testing of the

sewing unit.

The locking peg 1 belongs to the standard accessories of the sewing

unit. It serves to stake out the position A(looping stroke).

The setting gauges marked with *) are available on inquiry.

Position Setting gauge Order No. Use

1 Locking peg 0211 000700 Looping stroke position

2 *) Gauge 0246 002591 Crank pin to arm shaft

3 *) Gauge 0244 001001 Height of hook shaft

4 *) Measuring bridge 0212 004942 Height of needle holder

5 *) Measuring pin 0216 001070 Height of needle holder

6 *) Adjusting pin 0244 001014 Lateral hook distance

1.2 Groove in the arm shaft crank

The arm shaft crank 1 is provided with a groove 2 (5 mm).

The machine head can be staked out with the locking peg through

drill-hole 3.

Now the machine head is in looping stroke position

(position A).

2. Sewing machine head

2.1 Raising the sewing machine head

For maintenance work the machine head can be raised.

For this purpose the transport carriage must be in its rear position.

Caution: Danger of injury !

Switchthemainswitchoff.

Raise the machine head only with the main switch switched off.

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