Brother International PR1055X Operation Manual - Page 183
The upper thread breaks.
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Symptom Probable Cause/Remedy The upper thread breaks. The needle is not correctly installed. The needle set screw is loose. The needle is bent or blunt. The area around the hole in the needle plate is damaged. Page 176 176 176 * 1 Scratches/Burrs • Replace the needle plate. The needle is touching the needle plate. * APPENDIX Symptom Probable Cause/Remedy Page Sliding surface on hook is not smooth. There are * burns on it. 1 Hook race area The thread is loose in the hook area. The play between the hook and the race is too much. The hook does not rotate smoothly. • Remove lint, clean and apply oil. The space between the hook stopper and the hook cannot be adjusted. The upper thread is not threaded correctly. 173 * 173, 178 * 82 5 1 Needle 2 Needle plate hole 3 Needle touching hole The presser foot is set too high and not correctly * positioned. The needle hits/touches the presser foot. The area around the embroidery foot hole is * damaged. 1 Scratches/Burrs • Replace the presser foot. Using a specialty thread like a metallic thread. 89 • Slow down the machine embroidery speed. • Pull the upper thread by hand from below the presser foot, and check that the thread moves smoothly. If the thread does not move smoothly, it is not correctly threaded. Unthread the machine and re-thread the machine. Make sure the thread is correctly positioned in the needle bar thread guide. Upper thread is not positioned in upper or middle 82 thread guide. • Make sure thread passes completely under upper and middle thread guide. There are knots or tangles in the thread. - • Remove any knots or tangles. The upper thread tension is too high. 118 The bobbin thread tension is incorrect. 116 The thread does not roll out of the bobbin case smoothly. The bobbin case is damaged. 33 • Replace the bobbin case with a new one. The bobbin thread is not wound correctly. 33 • Check that the bobbin is wound so that it is about 80% full and that the thread is evenly wound. If the bobbin is not correctly wound, replace the bobbin with one that is correctly wound or rewind the bobbin. 181