Innov-is NQ550PRW / Innov-is NQ550
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FAQs & Troubleshooting |
Upper thread tightened up
Symptom
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(1) Wrong side of fabric (2) Bobbin thread visible from right side of fabric (3) Upper thread (4) Right side of fabric (5) Bobbin thread |
Cause
Incorrect bobbin threading
If the bobbin thread is incorrectly threaded, instead of the appropriate tension being applied to the bobbin thread, it is pulled through the fabric when the upper thread is pulled up. For this reason, the thread is visible from the right side of the fabric.
Remedy/check details
Correctly install the bobbin thread.
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(1) Presser foot lever |
Remove the bobbin from the bobbin case.
If the bobbin is inserted with the thread unwinding in the wrong direction, sewing will be done with an incorrect thread tension.
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(1) Tab (2) Hold down the bobbin with your right hand. |
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(3) Slit (4) Cutter |
If the thread is not correctly inserted through the tension-adjusting spring of the bobbin case, it may cause incorrect thread tension.
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(1) Tension-adjusting spring |