Duerkopp Adler 558 Service Instructions Manual page 63

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Set the stop screw 1.
The gimp end should, after cutting, still extend about 4 mm out of
the gimp hole in the needle plate.
Screw screw 1 in
Screw screw 1 out = longer gimp end
ATTENTION !
The path of the drop weight must also be reset when changing the
buttonhole length or the clamping plates (change of the cutting length
assembly) neu eingestellt werden.
From experience when changing the clamping plates turn the stop
screw 1 by 1 turn and a little less for length adjustment.
= shorter gimp end
1
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