Zigzag Stitch Mechanism Of Machines 523, 524, 527; Tooth Clearance Setting Of Zigzag Stitch Gear - Dürkopp Adler 52 i Series Service Instructions Manual

Zigzag stitch mechanism of machines 523, 524, 527

4
Order
The machine setting must be carried out in the sequence as described
herein.

4.1 Tooth clearance setting of zigzag stitch gear

Proper setting
The tooth clearance of zigzag stitch should be as small as possible.
No overlap instead of clearance, however, may arise in any mutual posi-
tion of the gears.
Pic. 10: Tooth clearance setting of zigzag stitch gear
(1) - Screw
(2) - Eccentric bolt
1. Dismantle the machine arm cover ( p. 13).
2. Loosen screw (1).
3. Turn the eccentric bolt (2) until the gear fitted on it strikes the gear (3).
4. Locate the eccentric bolt (2) in this position and fix it with a screw (1).
Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021
Zigzag stitch mechanism of machines 523, 524,
527
WARNING
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before checking and
setting.
①
With regard of the gear runout, caused by manufacturing inaccuracy,
turn the handwheel by 1/4 revolution, and set the clearance again.
Repeat this 8 times (2 revolutions of the main shaft), until the eccentric
bolt (2) position with the smallest tooth clearance is found.
(3) - Gear
③
②
19