Pfaff 3834-14/11 - Height and Stroke of the Bobbin Case Opener

Adjustment
13 - 7
8
7-026
13.04.05 Height and stroke of the bobbin case opener
Requirement
1. The top edges of the bobbin case opener 1 and bobbin case base 3 should be on one
level.
2. When the bobbin case opener 1 has deflected the bobbin case to its furthest point, the
catch of the bobbin case should be 0.3 - 0.5 mm from the back edge of the needle
plate recess.
Fig. 13 - 05
● Adjust bobbin case opener 1 ( screw 2 ) in accordance with requirement 1.
● Turn the balance wheel until the bobbin case opener has deflected the bobbin case to its
furthest point.
● Adjust bobbin case opener 1 ( screw 2 ) in accordance with requirement 2.
Depending on the thread size, a variation of the setting in Requirement 2 is
permitted.
1
2
87-024
3
1
87-025
0,3 - 0,5 mm