Make sure the needle is in correctly. I know this sounds like it would be a given. But I have one of these machines and it greatly matters. And that the thread is going through them correctly. But I went through much drama of breaking thread, all kinds of issues on a new quilt i had started. And I couldn't understand it since it had done so well on the one I had just finished. Turned out. I needed a different needle size for the fabric I was currently working on. Was sooooo glad to get it resolved.lol Good luck