Re: Bobbin cases

Jim Stutsman

Loops on the back would indicate insufficient TOP tension. The yellow dot case has increased bobbin tension, so it would be wrong for this application. Use the red dot case and try increasing the top tension until you get a good result. If you still have loops use the blue dot case, which has reduced tension. If you still have loops with that case you may have debris in the tension discs. Activate the LOCK function and use a folded strip of fabric to "floss" the tension.

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