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
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All rights reserved.
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.
Copyright © Dürkopp Adler AG - 2007

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
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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.
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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
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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).
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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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