Position Of Bobbin Case Opener - Pfaff 487 Service Manual

2.

Position of bobbin case opener

25
Requirement
When bobbin case opener 3 3 3 3 3 is in its far left position
1. the front edge of its finger must be 0.6 mm
2. hook base 6 6 6 6 6 must be pushed back from position finger 8 8 8 8 8 by 0.3 mm
rest on stop pin 5 5 5 5 5 .
7
3
Fig. 2 - 23
Loosen screws 1 and 2 so that bobbin case opener 3 is just movable.
Adjust bobbin case opener 3 according to Requirements 1 and 2.
Tighten screw 2.
Move fixing collar 4 up against bobbin case opener 3 and stop pin 5 and tighten screw 1.
0,6 mm
0,3 mm
8
6
3
0.6 mm behind the front edge of bobbin case trip 7 7 7 7 7 ; 0.6 mm 0.6 mm 0.6 mm
3
2
2
Adjustment
0.3 mm and screw 1 1 1 1 1 must 0.3 mm 0.3 mm 0.3 mm
5
4
1
2 - 24