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10.1. Correct thread tension
Front
Back
Left needle thread
10.2. Adjusting the thread tension for needle
threads
The thread tension on the left
needle is too loose.
Front
Back
Tighten the left thread.
6 mm
Upper looper thread
Lower looper thread
Right needle thread
The thread tension on the right
needle is too loose.
Front
Back
Tighten the right thread.
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