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Adjustment (Main Unit)
Inspection and
Adjustment
Inner rotary hook (bobbin thread) tension adjustment
1. Set a bobbin (wound with Schappe Spun Sewing Thread #60) in the inner rotary hook and thread.
2. Pull the thread with a tension gauge, and adjust the tension adjusting screw so that it is 0.1 – 0.12 N (10 – 12 g).
3. Apply a small amount of screw locking compound to the spring adjusting screw.
XA9153001 Tension gauge 30 (0.3 N)
0.1 - 0.12N
(10 - 12g)
Schappe Spun
Sewing Thread #60
Spring adjusting screw
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