PERFORMANCE CHECKLIST
If stitch is not formed:
xNeedle is not fully inserted into the needle clamp body.
xNeedle is inserted into the wrong side.
xNeedle is defective.
xBobbin thread (bottom) is not threaded correctly into the bobbin case hole.
If machine skips stitches:
xNeedle is not straight and sharp.
xNeedle is inserted on wrong side.
xMachine is not properly threaded.
xFabric is not firmly held down.
If needle thread (top) breaks:
xMachine is not properly threaded.
xNeedle thread (top) tension is too tight.
xThread is not freely unwinding from spool.
xNeedle is inserted on wrong side.
If bobbin thread (bottom) breaks:
xBobbin thread (bottom) is too tight.
xThread is entangled in bobbin case.
xBobbin thread (bottom) is threaded incorrectly into bobbin case.
If fabric does not feed:
xPresser foot is not lowered.
If needle breaks:
xNeedle is defective.
xNeedle is not inserted fully into needle clamp body.
xFabric is pulled excessively while sewing.
xNeedle thread (top) is caught somewhere.
xNeedle thread (top) tension is too tight.
If needle does not move:
xBattery power is weak.
xBatteries are not inserted correctly.
xFoot switch plug is not inserted fully.
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