Brother BAS-342G Basic Operation Manual page 32

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5. PREPARATION BEFORE SEWING

5-6. Thread tension

Thread tension reference

Upper thread

Lower thread

Upper thread tension (N)

Lower thread tension (N)

Pre-tension (N)

Needle

5-6-1. Lower thread tension

Weaker

5-6-2. Upper thread tension

#20 or similar

1.4 − 1.8

0.3 − 0.4

0.2 − 0.4

DP×17＃19

Stronger

Weaker

Stronger

Weaker

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

1. Turn the tension nut (1) (main tension) to adjust the

tension as appropriate for the material being sewn.

2. Use the tension nut (2) (sub tension) to adjust the upper

thread trailing length to about 42 mm.

2573B

BAS-342G