Marge is so right about the sandwich tension. I used a Juki on the frame until I got a larger frame. Two things would cause the needle to break: stretching the quilt sandwich too tight and going too fast. If your tension disks seem tight: unthread your machine..always raise presser foot when doing so....take 2 or 3 strands of poly thread or cotton that is not linty and "floss" your tension disks. If you have a little lint ball in there it should take it out. Watch the tension video and don't be afraid to change your bobbin tension. Good luck.
Marilyn