Bobbin-Case Opener Stroke - Pfaff 471 Instruction Manual

Adjustment
11.

Bobbin-case opener stroke

04.12
11 - 16
Requirement
When the bobbin-case opener has pushed the bobbin case down as far as possible, the tip
of the bobbin case must be 0.3 - 0.5 mm from the rear edge of the needle plate recess.
Fig. 11 - 12
Turn the balance wheel until the bobbin-case opener has pushed the bobbin case down as
far as possible.
Adjust the bobbin-case base (screw 1) according to the requirement.
Repeat the adjustment on the right-hand post for the 474.
This setting may differ according to the thread thickness.
0.3 - 0.5 mm
1