5. PERFORMANCE CHECKLIST
GENERAL PROBLEMS
Machine does not sew.
*Power switch is turned off.- Turn on the switch.
*Buttonhole lever is not raised when sewing stitch patterns.
–Raise buttonhole lever.
*Buttonhole lever is not lowered when sewing buttonhole.
–Lower buttonhole lever.
*Bobbin winder is engaged. – Disengage bobbin winder (see page 14 - 15).
*Presser foot is not lowered - Lower presser foot.
Machine jams/knocks.
*Thread is caught in hook.- Clean hook (see page 50 - 51).
*Needle is damaged.- Replace needle (see page 23).
Fabric does not move.
*Presser foot is not lowered - Lower presser foot.
*Stitch length is too short - Lengthen stitch length.
*Feed dogs are lowered - Raise feed dogs.
STITCHING PROBLEMS
Machine skips stitches.
*Needle is not all the way up into needle clamp(see page 23).
*Needle is bent or blunt. - Replace needle (see page 23).
*Machine is not threaded correctly (see page 18 - 19).
*Thread is caught in hook. - Clean hook (see page 50 - 51). Stitches are irregular.
*Needle size is not correct for thread and fabric (see page 22).
*Machine is not threaded correctly (see page 18 - 19).
*Top thread tension is too loose (see page 24 - 25).
*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 22).
*Needle is not all the way up into the needle clamp (see page
23).
*Twin needle is being used but stitch width is set too wide (see page 52 - 53).
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 6 inches (10 cm) and hold until a few stitches are formed.
Needle thread breaks.
*Machine is not threaded correctly (see page 18 - 19).
*Top thread tension is too tight (see page 24 - 25).
*Needle is bent. - Replace needle (see page 23).
* Needle size is not correct for thread and fabric (see page 22).
Bobbin thread breaks.
* Bobbin case is not threaded correctly (see page 16 - 17).
*Lint accumulates in bobbin case or hook. - Remove lint (see page 50
Fabric puckers.
*Top thread tension is too tight. - Adjust thread tension (see page 24 - 25).
*Stitch length is too long for sheer or soft fabric. - Shorten stitch length.
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