Adjusting thread tension on the needle threads
The tread tension on the left needle is too loose.
Adjust tension on the left thread.
The tread tension on the right needle is too loose.
Adjust tension on the right thread.
Adjusting thread tension on the looper threads
The lower looper thread is firm and/or the upper looper thread is loose.
Loosen the tension of the lower looper thread and/or tighten the upper looper thread.
The upper looper thread is firm and/or the lower looper thread is loose.
Loosen the tension of the upper looper thread and/or tighten the lower looper thread.
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