Adjustment
12 - 9
12.
04.07
Bobbin case opener stroke
Requirement
When the bobbin case opener presses the bobbin case to the furthest extent, the projection
of the bobbin case must protrude
0.3 - 0.5 mm
from the rear edge of the needle plate
recess.
1
●
Turn the handwheel until the bobbin case opener presses against the bobbin case to the
furthest extent.
●
Move the bobbin case base ( screw
1
, accessible from the rear of the post ) in
accordance with the
requirement
.
This setting can vary according to the thickness of the thread.
Fig. 12 - 07
0.3 - 0.5 mm
