Feed Halt When The Stitch-Length Regulator (Thrust Cam) Moves - Duerkopp Adler 271 Service Manual

2.2 Feed halt when the stitch-length regulator (thrust cam) moves

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Regulation and inspection
With the sewing machine locked in position B (class 271/273/275) or
position E (class 272/274) and the stitch length at maximum, there
must be no feed movement when the stitch-length regulator 2 is
moved.
Caution: danger of injury
Turn off the main switch.
The feed standstill may only be adjusted with the sewing machine
switched off.
Adjustment
–
Set the stitch length to maximum.
–
Undo both screws of thrust cam 1.
–
Lock sewing machine:
class 271/273/275
class 272/274
–
Rotate thrust cam 1.
When the stitch-length regulator 2 is moved the feed dog must
remain at a halt.
–
Retighten both screws of thrust cam 1.
This must place the thrust cam 1 hard up against the bearing
(axial shaft position).
in position B
in position E.