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.
15
Summary of Contents for SuperLockstitch SP-403
Page 20: ...Notes 19...
Page 21: ...Notes 20...
