Brother BAS-341E - Pretension Tension

5. Correct use
5-6-6. Pretension tension
1. Raise the work clamp 0 and open the main tension disc 8.
The thread take-up spring 8 should not operate when the thread is pulled in the direction of the arrow.
2. Set the thread tension for the thread breakage detector pretension 0 to approx. 5 g.
Weaken the thread tension for the machine head pretension 0 as much as possible.
I Standard for balance of thread tension I
Adjust the thread tensions so that the total tension for the pretensions 0 and 0 is lower than the tension for the
thread take
-up spring.
NOTE
14
If misoperation of the thread breakage detector continues, repeat the adjustment procedure above.
(Such misoperation is most likely to occur when synthetic fiber yarns are used.)
BAS-341 E • 342E
From the library of: Superior Sewing Machine & Supply LLC