Dürkopp Adler 52 i Series Service Instructions Manual page 45

Needle bar and hook
5. Tighten the screw (3).
6. Loosen two screws (1), try to set the timing of the feeding eccentric
Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021
and tighten the screws (1). Sew and watch the size of the space (C)
at the moment when the thread is passing through the space. Correct
the timing so that (C) = 1 mm.
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