Thread Tension And Thread Control - Pfaff 3117 Instruction Manual

Adjustment
14 Lateral thread tension and thread control
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14 - 56
Requirement
1. The thread check spring 1 must be flush with the top edge of the jockey finger 2.
2. The thread control 3 must be mounted in the elongated hole so that the thread check
spring 1 moves approx. 1 mm at the largest expansion of the thread loop by the hook.
Fig. 14 - 54
Thread the needle thread. See chapter 11.07 Threading the needle thread.
Loosen grub screw 4.
Turn the tension barrel 5 in accordance with requirement 1.
Tighten grub screw 4.
Loosen screws 6.
Move the thread control 3 in the elongated hole in accordance with requirement 2.
Tighten screws 6.
The path of the thread check spring 1 and the adjustment of the thread control
3 is dependent on the material and the thread and must be corrected in
accordance with the results of sewing.
3
6
5
1
2
4