Question about Singer 9960 - 9960 Quantum Stylist
My machine will sew several stiches and then the bobbin will bunch up causing the upper thread to spin around on top and wrap around in the bobbin case.
Classic burr on the hook problem would be my first guess. If the thread remains on the hook when it makes the next revolution all sorts of ugly things happen such as you described. I made a video that might help.
Posted on Nov 18, 2013
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Posted on Jan 02, 2017
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