I have a Singer 31-15. Had it sewing beautifully with #92 thread. Switched to #69 & the bobbin thread is looping BADLY.
I noticed that after a couple of stitches, the thread is jumping out of the tension discs. I've tried adjusting the tension on the discs, thread still jumps out. It seems as if it needs more tension before the discs to keep it between the discs.
I appreciate any suggestions you experienced folk have, however, I'm not a sewing machine repair person, or by any standard an expert, so simple answers will be the most helpful. I'm not up on the technical terminology.
Thanks!