Pre-Adjusting The Control Cam - Pfaff 900/51 Service Manual

2

Pre-adjusting the control cam

.05
Requirements
At the t.d.c of the needle bar,
1. the beginning of the highest point of the trip of the control cam 6 sould be positioned
under the tip of pawl 8 and
2. the right-hand side of the trip should be flush with the right-hand side of pawl 8.
1
2-02
Fig. 2 - 01
Pull the ball heads of connecting rod 1 off the ball pin at the cutting and control units
and remove connecting rod 1.
Loosen screws 2 and retaining spring 3 together with the cover disk.
Loosen screws 4 and 5.
Twist or shift control cam 6 in accordance with requirement 1 or requirement 2 as
required.
Tighten screws 4 firmly.
Push fixing collar 7 onto control cam 6.
Tighten screws 5 firmly.
4
4
3
2
Connecting rod 1 and retaining spring 3 stay dismantled for further
adjustments.
5
6
7
5
6
8
Adjustment
2 - 2