Loop Stroke And Gap Between Shuttle Tip And Needle - Duerkopp Adler 550-16-23 Service Instructions Manual

4.3 Loop stroke and gap between shuttle tip and needle

Regulation and inspection
The loop stroke is the path taken by the needle bar from bottom dead
centre to the point at which the shuttle tip is at the centre of the needle.
The loop stroke is 1.8 mm long.
With the machine locked in position A the shuttle tip 1 must be at the
centre of the needle.
The gap between the shuttle tip 1 and the needle must be 0.1 mm.
Caution: danger of injury
Turn off the main switch.
The loop stroke and the gap between the shuttle tip and needle may
only be checked and adjusted with the machine switched off.
Adjustment
–
Remove the sewing foot and needle plate.
Fit a new needle.
–
Lock the machine in position A.
–
Undo the shuttle's attaching screws 2.
2
–
Place the shuttle tip 1 at the centre of the needle.
The gap between the shuttle tip 1 and the throat
of the needle must be 0.1 mm.
–
Retighten the shuttle's attaching screws 2.
–
Replace the sewing foot and needle plate.
2
13
3