Adjustment
13 - 13
●
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. 13 - 09
1
0.3 - 0.5 mm
13.
04.10
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.