Brother International PR1055X Operation Manual - Page 185

Symptom Probable Cause/Remedy There are loops in the upper thread. The upper thread tension is low. Page - • After passing the upper thread through the hole in the presser foot, pull the thread by hand to check the thread tension. If it is difficult to determine, compare it with other needle bars where looping does not occur. The thread tension does not correspond to the 175 amount that the thread tension knob was tightened. • If the thread tension cannot be adjusted, thread wax and dust may have collected in the upper or middle thread guide plates, causing the thread tension guide plates to rise. Clean the thread tension guide plates. Thread is not correctly threaded around upper 176 thread tension discs. • Clean upper thread tension disc. Rethread and make sure tension disc rotates when pulling on thread. The thread quality is poor. - • Try embroidery with different thread. If the problem no longer occurs after the thread is changed, the thread quality is the problem. Replace the thread with one of good quality. The machine is noisy. Lint may be wound in the hook. 173 The upper thread is not threaded correctly. 82 The hook is damaged. * • Replace the hook. Not enough oil was applied. 178 The needle threader cannot be used. The needle is not at the correct position. 86 • Touch the key to move the desired needle bar to be threaded into embroidering position. Recommended needles are not used on this 176 machine. The needle is not installed correctly. 176 The hook on the automatic needle-threading * mechanism is bent. APPENDIX Symptom Probable Cause/Remedy Page The thread tension is incorrect. The upper thread is not threaded correctly. 82 The bobbin thread is not correctly threaded. 34 The bobbin thread tension is incorrect. 116 Lint or dust has accumulated in the thread 176 tension disc. The upper thread comes out of the needle when embroidering begins. If a short length of thread remains after the thread 124 is trimmed, the needle may become unthreaded when embroidering begins again. • Set the remaining length of thread to [Long Tail] on settings screen. The upper thread does not reach the bobbin thread when embroidering begins. There is no more thread in the bobbin, the thread 34 does not feed from the bobbin, or the thread that is fed from the bobbin is too short. • Correctly thread the bobbin thread. Although the thread is not broken, a broken thread error occurs and the machine stops. If the thread breakage sensor in the thread 176 tension disc of the thread tension knobs cannot * detect that the thread is being fed, even if the machine is running, a broken thread error occurs and the machine is stopped. • Correctly pass the thread through the thread tension disc. If the broken thread error occurs after the machine is rethreaded, the sensor may be damaged. The thread is worn. Lint or dust has accumulated in the thread 176 tension disc. Jump stitches are long. Lint or dust has accumulated in the thread 176 tension disc. There are needle cuts or holes in the garment. The needle is dull. 176 • Replace the needle. Dull needles have a difficult time passing through the garment, causing fabrics to tear. The fabric is too delicate. - • The simple penetration of the needle could damage delicate fabrics. Use stabilizer on top of fabric. 5 183