try the search, I think someone posted about this and it was the tension (which on my Juki, is different when FMQ.) Please double check because it could also be the way the machine is threaded. Shoot it took me from May until now to figure out that to prevent the thread breaking every 10 inches on my Juki and Grace frame that I needed to go left to right, not the other way. Goodness am I just a slow learner..............