Check that you're using the right needle/thread combo, and check that the needle is appropriate for your machine. I was having a ridiculous amount of issues on my brother pq 1500s and it turns out, it just didn't like superior brand needles, once I put in an organ brand needle, it was happy. I was having thread breaks, tangles, needle breaks etc. It was more frustrating than I can say!
To add, it would be fine for a while, then I'd notice it skip a stitch or two, then all hell would break loose. Always a good time. Does your manual have a troubleshooting guide?
Last edited by huskyquilter; 09-23-2015 at 10:26 AM.