I had the same problem with my Brother 1500. I could have no tension at all and the needle would come unthreaded so it wasn't a tension issue. The Brother has a three hole bar at the top. I was threading two or three of the holes as the manual showed. I now use only the first hole only as a thread guide and the needle does not come unthreaded when I use the thread cutter.
Last edited by QuiltnNan; 01-16-2014 at 10:04 AM.
Reason: remove negativity