Question about Bernina Sewing Machines
Possibly its the check spring that takes up the slack in the thread as the needle pierces the fabric. slowly lower the needle through the fabric and watch if there is slack in the thread just above the fabric. If there is then this check spring needs to be adjusted. I hate to say this and its not just because I am a Bernina tech but its time for it to be serviced. many things might be the culprit. The distance between the hook and needle could be off for one more reason. Or something dirty or fluff under the spring the thread goes under on the bobbincase. Either a servicing or use the same color bobbin thread beneith is in order. Wish I could help more but you have tried a lot so I ruled those out such as tighter bobbin tension or looser upper tension or the combination of both.
Posted on Oct 09, 2009
Testimonial: "Thanks, Rick. I will try your suggestion to watch for slack in the thread. Thanks for not suggesting I do all the things I have already tried!"
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Posted on Jan 02, 2017
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