5. PREPARATION BEFORE SEWING
24
BAS-342G PS
5-6. Thread tension
[Thread tension reference]
Upper thread #20 or similar
Lower thread #20 or similar
Upper thread tension (N)
1.0 − 1.6
Lower thread tension (N)
0.4 − 0.6
Pre-tension (N)
0.3 − 0.6
Needle DP x 17 #19
Normal sewing speed 2,000 sti/min
5-6-1. Lower thread tension
Adjust the lower thread tension by turning the adjusting
screw (1).
5-6-2. Upper thread tension
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 45 mm.
2573B
Weaker
Stronger
Weaker
Stronger
Weake
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