Top Innovations SP-403 - Manual (Page 17)

PERFORMANCE CHECKLIST
If stitch is not formed:
x Needle is not fully inserted into the needle clamp body.
x Needle is inserted into the wrong side.
x Needle is defective.
x Bobbin thread (bottom) is not threaded correctly into the bobbin case hole.
If machine skips stitches:
x Needle is not straight and sharp.
x Needle is inserted on wrong side.
x Machine is not properly threaded.
x Fabric is not firmly held down.
If needle thread (top) breaks:
x Machine is not properly threaded.
x Needle thread (top) tension is too tight.
x Thread is not freely unwinding from spool.
x Needle is inserted on wrong side.
If bobbin thread (bottom) breaks:
x Bobbin thread (bottom) is too tight.
x Thread is entangled in bobbin case.
x Bobbin thread (bottom) is threaded incorrectly into bobbin case.
If fabric does not feed:
x Presser foot is not lowered.
If needle breaks:
x Needle is defective.
x Needle is not inserted fully into needle clamp body.
x Fabric is pulled excessively while sewing.
x Needle thread (top) is caught somewhere.
x Needle thread (top) tension is too tight.
If needle does not move:
x Battery power is weak.
x Batteries are not inserted correctly.
x Foot switch plug is not inserted fully.
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