37
F-3
CHECK CHART FOR PERFORMANCE PROBLEMS
GENERAL PROBLEMS
Machine does not sew.
* Foot control is not connected.- See page 8.
* Power switch is turned off.- Turn on the switch.
Machine jams/knocks.
* Thread is caught in hook.- Clean hook (see page 34 - 35).
* Needle is damaged.- Replace needle (see page 27).
Fabric does not move.
* Presser foot is not lowered - lower presser foot.
* Stitch length is set at 0. - Set it at 1 to 4.
STITCHING PROBLEMS
Machine skips stitches.
* Needle is not all the way up into needle clamp. - (see page 27).
* Needle is bent or blunt. - Replace needle (see page 27).
* Machine is not threaded correctly. - (see page 13).
* Thread is caught in hook. - Clean hook (see page 34 - 35).
Stitches are irregular.
* Needle size is not correct for thread and fabric. - (see page 25 - 26).
* Machine is not threaded correctly. - (see page 13).
* Top thread tension is too loose. - (see page 24).
* Fabric is being pulled or pushed against machine feeding action.
- Guide it gently.
* Bobbin has not been wound evenly. - Rewind bobbin.
Needle breaks.
* Fabric is being pulled or pushed against machine feeding action.
-Guide it gently.
* Needle size is not correct for thread and fabric. - (see page 25 - 26).
* Needle is not all the way up into the needle clamp (see page 25 - 26).
THREAD PROBLEMS
Thread bunches.
* Top and bobbin threads are not drawn back under presser foot before
starting seam. - Draw both threads back under presser foot about 4
inches (10 cm) and hold until a few stitches are formed.
Needle thread breaks.
* Machine is not threaded correctly. - (see page 13).
* Top thread tension is too tight. - (see page 24).
* Needle is bent. - Replace needle (see page 27).
* Needle size is not correct for thread and fabric - (see page 25 - 26).
Bobbin thread breaks.
* Bobbin case is not threaded correctly. (see page 12).
* Lint accumulates in bobbin case or hook. - Remove lint (see page 34 - 35).
Fabric puckers.
* Top and bobbin thread tensions are too tight. - Adjust thread tensions (see
page 24).
* Stitch length is too long for sheer or soft fabric. - Shorten stitch
length.
