Pfaff 3827-2 - Position of Bobbin Case Opener

Adjustment
14 - 25
14.23 Position of bobbin case opener
Requirement
With the bobbin case opener 3 at its left point of reversal:
1. the front edge of the bobbin case opener finger must be approx. 0.6 mm behind the
front edge of the bobbin case cam 7.
2. The bobbin case carrier 6 must be approx. 0.3 mm from the positioning finger 8 and
screw 1 must be touching stop pin 5.
● Loosen screw 1 and then loosen screw 2 so that the bobbin case opener 3 is still just
held in position.
● Adjust the bobbin case opener 3 in accordance with requirement 1.
● Turn the bobbin case opener 3 in accordance with requirement 2 and tighten screw 2.
● Set fixing collar 4 against the bobbin case opener 3 and stop pin 5 and tighten screw 1.
3
2
4
1
5
2
3
7
0.6 mm
0.3 mm
3
6
8
Fig. 14 - 23