Adjustment
11 - 13
thread width
11.04.11 Bobbi case opener stroke
Requirement
1. The front edges of retaining spring 1 and retaining trip 7 must be flush.
2. With bobbin case opener 5 in its rear position, hook base 6 and retaining spring 1 must
have a clearance equal to the thread thickness.
Fig. 11 - 11
● Position retaining spring 1 (screw 2) according to Requirement 1.
● Re-position shafts 3 (screws 4) according to Requirement 2.
Carry out adjustment on both hooks.
3
4
3
4
7
6
5
2
1
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