Bobbin Case Opener Stroke - Pfaff 3734-2/01 Instruction Manual

12.

Bobbin case opener stroke

04.07
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.
Fig. 12 - 07
● 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.
Adjustment
0,3 - 0,5 mm
1
12 - 9