Dürkopp Adler 52 i Series, Service Instructions Manual

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Needle bar and hook
42 Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021
7.3 Hook lifting
Proper setting
In the direction of the hook axis there should be the space (A) = 0,8 mm
between the bobbin case lifter and the hook. The maximum hook lifting
should be (B) = 0,4 to 0,8 mm according to the thread thickness. The tim-
ing of the lifting eccentric should enable a smooth passage of the thread
between the bobbin case and the bobbin case lifter (C) = 1 mm.
Pic. 31: Hook lifting
1. Dismount the throat plate (
 p. 15
).
2. Tilt the machine (
 p. 12
).
3. Loosen the screw (4) and shift the case (2) to obtain the space (A) =
0,8 mm and tighten the screw (4).
4. Turn the hand wheel until the bobbin case lifter (5) is in the maximum
lifting position (left position). Loosen the screw (3) and turn the bobbin
case lifter so that the space (B) = 0,4 to 0,8 mm is achieved according
to the thread thickness.
(1) - Screw
(2) - Case
(3) - Screw (4) - Screw
(5) - Bobbin case lifter
②
③
①
A
⑤
④
B
C