Adjusting Thread Trimmer -900/56; Control Cam ( Pre-Calibrating ) - Pfaff 1243-712/02 Adjustment Manual

13

Adjusting thread trimmer -900/56

.05
13 Control cam
.05.01
Rule
1. The bearing surface of the control cam 5 should be positioned centrally to the pawl
8 on the side.
2. When the thread lever is at t.d.c., the start of the largest eccentricity of the bearing
surface ( in the direction of rotation ) should be under the tip of the pawl 8.
8
Fig. 13 - 12
● Remove the catch 1 ( screws 2 ).
● Remove the plate 3 ( screws 4 ).
● Loosen the four screws of the control cam 5 and the screws 6 of the retaining collar 7.
● Move the control cam 5 sideways according to rule 1.
● Adjust the retaining collar 7 in this position so that it touches the control cam 5 and
tighten the screws 6.
● Move the thread lever to t.d.c. by turning the handwheel.
● Turn the control cam 5 in the direction of rotation according to rule 2, ensuring that it
rests on the retaining collar 7.
● Tighten the four screws of the control cam 5 in this position.
( pre-calibrating )
5
6
7
5
8
5
1
2
8
Adjustment
4
3
17