Pfaff 3811-3/55 Instruction Manual page 93

13 Hook to needle clearance in the sewing direction
.06.24
Rule
The clearance between the hook points and the needle in the direction of sewing should
be approx. 0.1 mm.
Fig. 13 - 24
 Turn the handwheel until the hook point reaches the left side of the needle from the right
side.
 Adjust looper unit 1 (screws 2) according to the rule.
2
If the clearance of 0.1 mm is not achieved, this can be corrected on the eccen-
tric bearing pins 3.
After making this setting the hook height and hook angle must be checked, see
Chapter 13.06.23 Looper height and looper angle.
2
3
0.1 mm
1
Adjustment
93