Brother International PR670E Operation Manual - Page 223

Symptom Probable Cause/Remedy Page The embroidery pattern is misaligned. The carriage moved while removing embroidery frame. • The pattern may become misaligned if the presser foot was hit or the carriage was moved while replacing bobbin thread, changing needle, or working near embroidery frame. Be careful when removing and reattaching the embroidery frame while replacing bobbin - thread, changing needle, or working near embroidery frame. If the carriage is moved, turn the machine off, then on again. The correct frame position at the time that the machine was stopped is stored in the machine's memory, and the embroidery frame is returned to the correct position. The design was not digitized correctly. • The design may need more pull compensation or underlay to accommodate - stretchy or high-napped fabrics. The size of the installed embroidery frame is not correctly detected. The thumbscrews on the embroidery frame holder are loose. • Use the included disc-shaped screwdriver to p.28 firmly tighten the thumbscrews. The starting position for the embroidery frame is horizontally misaligned. The thumbscrews on the embroidery frame holder are loose. • Use the included disc-shaped screwdriver to p.28 firmly tighten the thumbscrews. There are loops in the upper thread. The upper thread tension is low. - • 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. APPENDIX Symptom Probable Cause/Remedy There are loops in the upper thread. The thread tension does not correspond to the 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 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 sewing 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. • Clean the hook. The upper thread is not threaded correctly. • Check the thread path, and then thread the upper thread again. The hook is damaged. • Replace the hook. Not enough oil was applied. • Oil recommended parts. The needle threader cannot be used. The needle is not at the correct position. • Touch the key to move the desired needle bar to be threaded into embroidering position. Recommended needles are not used on this machine. • Replace and use recommended needle. The needle is not installed correctly. • Correctly install the needle. The hook on the automatic needle-threading mechanism is bent. The thread tension is incorrect. The upper thread is not threaded correctly. • Check the thread path, and then thread the upper thread again. The bobbin thread is not correctly threaded. • Correctly thread the bobbin thread. The lower thread tension is incorrect. • Adjust the tension of the bobbin thread. Lint or dust has accumulated in the thread tension disc. • Remove the tension dials, and then remove any lint or dust accumulated between the felt washers. Page p.213 p.213 - p.210 p.50 * p.214 p.56 p.30 p.79 p.30 p.79 * p.50 p.33 p.102 p.213 7 221