Duerkopp Adler 69-373 Betriebsanleitung

69-373 / 69-373H

Spezialnaehmaschine

Serviceanleitung

Service Instructions

Manufacturer: Dürkopp Adler Manufacturing (Shanghai) Co., Ltd.

1201 Luoshan Road, Pudong New Area, Shanghai 200135, China

Contact: Dürkopp Adler AG, PO Box 17 03 51, D-33703 Bielefeld, Potsdamerstr. 190, D-33719 Bielefeld,

Phone +49 (0) 521 9 25 00, Fax +49 (0) 521 9 25 24 35, www.duerkopp-adler.com

Manufacturer: Dürkopp Adler Manufacturing (Shanghai) Co., Ltd.

1201 Luoshan Road, Pudong New Area, Shanghai 200135, China

Contact: Dürkopp Adler AG, PO Box 17 03 51, D-33703 Bielefeld, Potsdamerstr. 190, D-33719 Bielefeld,

Phone +49 (0) 521 9 25 00, Fax +49 (0) 521 9 25 24 35, www.duerkopp-adler.com

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

02/2008 Rev. index: 00.0 PrintedinChina 0791 069642

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 Cl. 69-373

(Edition 02/2008) Cl. 69-373H

1. General

1.1 Gauge set ................................................... 4

2. Zero position, feeding with sewing equipment

2.1 Checking the zero position (position of the stitch regulator link)................... 5

2.2 Settingofthebottomfeed.......................................... 6

2.2.1 Positionofthefeeddoginthethroatplatecutout ........................... 6

2.2.2 Advancingmovementofthefeeddog................................... 7

2.2.3 Lifting movement of the feed dog (only with the class 69-373H) ................... 8

2.3 Synchronous run of the needle and bottom feed ............................ 10

2.4 Setting of the upper feed .......................................... 11

2.4.1 Stroke of the upper feed and the material presser foot......................... 11

2.4.2 Advancing movement of the upper feed foot............................... 12

2.5 Stitch regulator (equal stitch length for forward and reverse stitching) ............... 13

3. Sewing foot height and sewing foot lifting

3.1 Sewingfootliftingwiththeliftinglever .................................. 14

3.2 Sewingfootliftingwiththekneelever................................... 15

4. Opening the thread tension

4.1 Threadcontrollerspring........................................... 17

5. Needle bar height .............................................. 18

6. Hook settings

6.1 Loop stroke and clearance of the hook point to the needle ...................... 19

6.2 Bobbin case holder.............................................. 20

7. Bobbin winder ................................................ 21

8. Oil lubrication

8.1 General..................................................... 22

8.2 Lubrication points............................................... 23

9. Maintenance ................................................. 24

10. Summary of all sewing machine settings ............................... 25

1. General

These service instructions describe the adjustments that can be made

to the class 69 special sewing machine.

69-373 Single-needle, lockstitch, free-arm sewing machine with

bottom feed, needle feed and alternating top feed.

69-373-H like the class 69-373,

additionally with bottom feed stroke.

ATTENTION!

The tasks described in the present service instructions may only be

carried out by qualified staff or other appropriately trained persons!

Caution: Danger of injury!

Always turn off the main switch before any repair, conversion and

maintenance work and separate the machine from the pneumatic

supply line.

Any adjustment work and function testing with the machine running is to

be conducted only under observance of all safety measures and with

the greatest possible caution.

The present service instructions describe the setting of the sewing

machine in a logical order.

Please remember that various setting positions are dependent on each

other. Thus it is essential that the settings be made in the order

described.

For all adjustments of parts involved in the stitch formation, a new

undamaged needle must be inserted.

When adjusting the cutting devices all the cutting tools must also be

replaced.

ATTENTION!

All parts marked with colors were set at the factory and should only be

loosened by skilled personnel.

1.1 Gauge set

You can use the setting gauges included in the gauge set to check and

adjust accurately the sewing machine.

Pos. Setting gauge Order no. Use

1 Gauge 0981 150003 Loop stroke

2 Block 0981 150002 Loop stroke

3 Special wrench 0981 160402 Stitch uniformity

2. Zero position, feeding with sewing equipment

2.1 Checking the zero position (position of the stitch regulator link)

Caution: Danger of injury!

Turn off the main switch.

Check the zero position of the stitch regulator only when the sewing

machine is switched off.

Rule and control

In the zero position of the stitch regulator lever, the feed dog and the

needle should not make any advancing motion when the handwheel is

moved.

–Set the stitch regulator lever 3 to “0”.

Loosen the butterfly nut 1.

Turn the adjusting screw 2.

Tighten the butterfly nut 1.

–Turn the handwheel.

The needle and feed dog should not make any advancing motion.

2.2 Setting of the bottom feed

2.2.1 Position of the feed dog in the throat plate cutout

Caution: Danger of injury!

Turn off the main switch.

Check and set the position of the feed dog only when the sewing

machine is switched off.

Rule and control

Sideways:

The feed dog must lie centric in the throat plate cutout.

In the feeding direction:

At the maximum stitch length, the minimum clearance of the feed

dog to the front and rear edges of the throat plate cutout must be

approx. 0.5 mm.

The clearance is required so that the feed dog does not hit against the

throat plate during sewing.

–Set the stitch regulator lever to “max.”

–Turn the handwheel and check the position of the feed dog.

Adjustment

Sideways:

–Loosen screws 1.

–Slide the feed dog axially until it lies centric in the throat plate

cutout.

–Tighten screws 1 again.

In the feeding direction:

–Tilt back the machine head.

–Loosen the threaded pin 3 on the fork.

–Push the feed dog lever 2 forward (to the operator side), with the

feed dog screwed on, until a clearance of 0.5 mm is obtained.

–Tighten the threaded pin 3 again.

0,5 mm

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