Originally Posted by
quiltingcandy
I know this sounds crazy but are you sure you have the bobbin spinning in the right direction? When I had that problem with my 15-91 and my FW, that was the problem. For some reason I didn't think it mattered but when I read the books and went slower it was one thing that seemed to matter.
Yep, made sure that was correct and that partially solved the problem. Checked all threading, changed threads and needles and still having problems. I don't have as bad a problem when piecing, so the thickness of the quilt is part of the problem, but I should be able to fix that by adjusting the top tension. Nothing seems to totally solve the problem. I've already ruined one quilt because I thought I had the problem fixed and did a bit of quilting only to find the problem reasserted itself and it was too knotted to take out without ruining the backing fabric.