Brother 681B-UG - Manual (Page 36)

Check List for Better Sewing
Check this list if you are having the following problems:
IF MATERIAL IS NOT FED
1. Feed dog is down .
2. Stop motion knob is loose.
3. Stitch length regulator is at 0.
IF NEEDLE BREAKS
1. Needle is inserted incorrectly.
2. Needle clamp screw is loose.
3. Bent needle is used.
4. Upper threading is not correct.
5. Upper thread tension is too tight.
6. Wrong needle and thread for cloth being
sewn are used.
7. Material pulled excessively.
IF LOOPS FORM ON FABRIC
1. Tension of upper or lower thread is
wrong.
IF MATERIAL SHOULD PUCKER
1. Thread tension is too tight.
2. Threading is not correct.
3. Thread is caught by something.
4. Lower thread is unevenly wound on
bobbin.
IF UPPER THREAD BREAKS
1. Upper threading is not correct.
2. Upper thread is too large for needle eye.
3. Upper thread tension is too tight.
4. Needle is inserted incorrectly.
IF LOWER THREADS BREAKS
1. Lower thread is entangled in shuttle.
2. Lower thread tension is too tight.
3. Lower threading is not correct.
IF MACHINE SKIPS STITCHES
1. Needle is not sharp and straight.
2. Needle is inserted incorrectly.
3. Wrong needle and thread for cloth being
sewn are used.
4. Upper threading is not correct.
5. Lint is clinging to under-side of needle
plate.
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