DURKOPP ADLER 827 Service Instructions Manual page 36

To adjust the eccentric for forward and backward stitches:
1. Tilt the machine head ( p. 14).
2. Loosen the threaded pin (2).
3. Turn the eccentric (3) through the hole.
4. Tighten the threaded pin (2).
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Initial position
The slot in the eccentric (3) is parallel to the threaded pin (2),
the recess (4) faces the front.
• Turn clockwise: the forward stitch becomes larger, the backward
stitch smaller
• Turn counterclockwise: the forward stitch becomes smaller,
the backward stitch larger
Stitch length adjusting wheel
Service Instructions 827/827-M - 01.0 - 05/2019