Pfaff 3811-3/55 Instruction Manual page 113

13 Thread catcher guard
.08.04
Rule
1. With the needle bar in the t.d.c. position the guide roller 3 should be in the centre of
the cutout in the securing curve 2.
2. In the home position of the thread trimmer and the needle bar in the t.d.c. position
there should be a clearance between the securing curve 2 and the guide roller 3 of
0.5 – 1.0 mm.
Fig. 13 - 44
 Loosen screws 1 until the securing curve is diffi cult to turn on its shaft.
 Move the needle bar to t.d.c.
 In this position twist the securing curve 2 according to rule 1.
 Move the thread cutter equipment to the home position and the needle bar to the t.d.c.
position.
 Adjust securing curve 2 according to rule 2 and tighten screw 1.
Adjustment
3
1
2
0.5 - 1 mm
2
1
3
113