Adjustment
13 - 13
13.05.10 Bobbin case opener stroke
Requirement
1. The front edges of the retaining spring 1 and the retaining trip 7 must be flush with
each other.
2. When the bobbin case opener 5 is at its rear point of reversal, the distance between
the bobbin case base 6 and the retaining spring 1 must be equal to the thread
thickness.
2
7
6
5
1
● Align the retaining spring 1 (screw 2) according to requirement 2.
● Move shaft 3 (screw 4) according to requirement 1.
Fig. 13 - 11
3
6
4
3
thread thickness
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