Thread Tension; Lower Thread Tension - Brother BAS-341H Instruction Manual

4-6. Thread tension

[Thread tension reference]
Upper thread
Lower thread
Upper thread tension (N)
[Tension value]
Lower thread tension (N)
Pre-tension (N)
Needle
Normal sewing speed
*1 This is the tension value when the pretension is 0.2 N.

4-6-1. Lower thread tension

Weaker
#20 or similar
#20 or similar
1.4 − 1.8
[140 - 180]*1
0.3 − 0.4
0.2 − 0.4
DP x 17 #19
2,000 sti/min
Stronger
Adjust the thread tension to the weakest possible tension by
turning the thread tension nut (1) until the bobbin case will not
drop by its own weight while the thread end coming out of the
bobbin case is held.
2536Q
BAS-341H, BAS-342H
4. PREPARATION BEFORE SEWING
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