Driving me crazy!
I had a problem with points not meeting on a quilt top, and someone on the board suggested couching yarn with a zigzag stitch over it to hide the problem. Great idea! It worked too! But all of a sudden my machine starts not zigzagging correctly. I get very loose threads, and even broken ones, which I really can't figure out because the thread continues to stay whole as it stitches. What's with that? How can it be?
I cleaned out all lint, I rethreaded, I tried changes in tension. I tested on a separate test sandwich and it works perfectly, until I sew it on the quilt sandwich, and then it messes up.
I've included 3 pictures. One, with blue yarn, where it's working correctly, and 2 with brown yarn where it messes up. The yarns, thread, etc. are all the same.
Any suggestions? Help!