Hook Setting; Looping Stroke And Distance Between The Hook Point And Needle - Duerkopp Adler 281 Service Instructions Manual

6.

Hook setting

6.1 Looping stroke and distance between the hook point and needle

3
1
3
2
Caution: Risk of injury!
Turn off the main switch!
Check and set the looping stroke and the distance between the hook
point and needle only with the sewing machine switched off.
Standard checking
The loop stroke is the distance covered by the needle bar from the
bottom dead center up to the point where the hook tip 2 coincides with
the middle of the needle
(line A-A).
The looping stroke amounts to 1.8 mm.
With the sewing machine arrested at locking position "1", the hook
point 2 should be at the center of the needle.
The lateral distance between the hook point 2 and the needle scarf 3
should amount between 0.05 to 0.1 mm.
Correction
–
Remove the sewing foot, the throat plate and the feed dog.
–
Insert a new needle.
–
Arrest the sewing machine at locking position "1".
–
Loosen the fastening screw 1 of the hook.
–
The distance between the hook point 2 and the needle scarf 2
should amount between 0.05 to 0.1 mm.
–
Fasten the fastening screw 1 of the hook again.
–
Fix the sewing foot, the throat plate and the feed dog again.
2
1
GB
23