Brother International Innov-is NQ550PRW Operation Manual - Page 108
Tangled thread on wrong side of fabric
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Troubleshooting Pull the thread to pass it through the slit in the needle plate cover, then cut it with the cutter. ■ Remedy/check details Remove the tangled thread, and then correct the upper threading. Remove the tangled thread. If it cannot be removed, a cut the thread with scissors. • For details, refer to "Cleaning the race" on page A-2. Remove the upper thread from the machine. b • If the bobbin was removed from the bobbin case, refer to "Installing the bobbin" in the "Basic operations" section and "Remedy/check details" in the section "Upper thread tightened up" on page A-5 to correctly install the bobbin. Refer to the following steps to correct the upper c threading. Raise the presser foot using the presser foot lever. 3 Slit 4 Cutter Sewing with the correct thread tension is possible after the bobbin has been correctly installed in the bobbin 1 case. Tangled thread on wrong side of fabric ■ Symptom • The thread becomes tangled on the wrong side of the fabric. • After starting sewing, a rattling noise is made and sewing cannot continue. • Looking under the fabric, there is tangled thread in the bobbin case. 1 Presser foot lever The upper thread shutter opens so the machine can be threaded. • If the presser foot is not raised, the machine cannot be threaded correctly. Press (Needle position button) once or twice to d raise the needle. The needle is correctly raised when the mark on the handwheel is at the top, as shown below. Check the handwheel and, if this mark is not at this position, press (Needle position button) until it is. 1 1 Mark on handwheel Turn off the machine. e ■ Cause Incorrect upper threading If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise. A-6
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