Adjustment
13 - 13
13.05.11 Bobbin case opener
Requirement
The needle thread must neither be trapped between bobbin case opener 3 and hook base
4 nor between position finger 5 and the retainer on the needle plate (see arrows).
● Undscrew and remove post covers 1 (on left post from the rear).
● Undo screws 2 enough to allow bobbin case opener 3 to be turned on its shaft against a
resistance.
● Thread up the machine, place sewing material in and lower the lifting presser.
● Set bobbin case opener 3 according to Requirement.
● In this position, apply pressure on the bobbin case opener from the top, move clamp
collar 6 up against it and tighten screws 2.
Fig. 11 - 11
1
2
6
4
3
5
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