Originally Posted by
TinkerQuilts
Have you tried slowing down the speed?
This saw my first thought. Most all of the books say to slow it down. You also need to make sure the thread isn't catching on anything and that the thread is not old. If you can pull on it and it breaks off in your hands, throw it out. The needle needs to have a deep scarf (groove) to accommodate the many , many times it passes through the fabric to make the design. The fabric thread count could be at fault too. If the weave of the fabric is too tight it can cause the thread to shred. You could try a top stitching or micro tec needle to see if that works better. The scarf is larger on that one to accommodate the larger top stitching thread.