Needle Rise, Hook-To-Needle Clearance, Needle Height (Final Adjustment) And Needle Guard - Pfaff 422 Instruction Manual

Adjustment
11 Needle rise, hook-to-needle clearance, needle height (final adjustment) and
.04.10
needle guard
11 - 11
Requirement
In needle rise position (observe machine model!) and at stitch length setting "3"
1. the hook point must be at " " " " " needle centre" " " " " at a clearance of 0.05 to 0.10 mm,
2. the top of the needle eye must be 0.8 mm below the hook point, and
3. needle guard 9 must touch the needle just slightly.
Models A and B .................................. needle rise position: 1.8 past b.d.c. of needle bar
Model C ....................................... needle rise position: 2.0 mm past b.d.c. of needle bar
2
9
7
0.05 - 0.1 mm
Fig. 11 - 10
Set stitch length at "3" and loosen screws 1, 2, 3, 4 and 5.
Set machine at needle rise position and hook point at " " " " " needle centre". ". ". ". ".
Set hook clearance according to Requirement 1 and tighten screws 1, 2 and 5.
Making sure there is only a slight gear play, move fixing collar 6 up and tighten screws 3.
1
3
3
4
3
6
8
1
4
3
6
5