Brother International BAS-343E Instruction Manual - English - Page 21

Pretension tension, Correct use

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5. Correct use 5-6-6. Pretension tension 1. Raise the work clamp q and open the main tension disc w. The thread take-up spring e 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 r to approx. 5 g. Weaken the thread tension for the machine head pretension t as much as possible. Standard for balance of thread tension Adjust the thread tensions so that the total tension for the pretensions r and t is lower than the tension for the thread take -up spring. NOTE 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-343E 14

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5. Correct use
14
BAS-343E
5-6-6. Pretension tension
1.
Raise the work clamp
q
and open the main tension disc
w
.
The thread take-up spring
e
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
r
to approx. 5 g.
Weaken the thread tension for the
machine head pretension
t
as much as possible.
Standard for balance of thread tension
Adjust the thread tensions so that the total tension for the pretensions
r
and
t
is lower than the tension for the
thread take -up spring.
NOTE
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.)