Pfaff 3307-1 SERIES - Adjusting the Loop Spreader

Adjustment
13 - 15
13.15 Adjusting the loop spreader
Requirement
1. When the needle bar is positioned at t.d.c., the milled slot in control cam 4 should be at
the bottom.
2. In the needle rise position, loop spreader 7 should begin its reverse movement.
3. When the needle is descending (in the direction of sewing) loop spreader 7 should be at
its bottom left stroke, when the needle has reached the top edge of the needle plate.
64-110
Fig. 13 - 13
1
64-078
3
4
5
6
2
3
● Loosen screws 1 and 2.
● With the balance wheel set the needle bar at its t.d.c. and lock it with locking pin 3.
● Adjust control cam 4 together with control cam 5 in accordance with requirement 1.
● Move control cam 4 together with control cam 5 to touch drive wheel 6 and tighten
screws 1 and 2.
● Remove locking pin 3.
● Carry out a check in accordance with requirements 2 and 3.