64
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).
Machine jams/knocks.
* Thread is caught in hook.
-
Clean hook (see page 60 - 61).
* Needle is damaged.
-
Replace needle (see page 22 - 23).
Fabric does not move.
* Presser foot is not lowered - Lower presser foot.
* Stitch length is too short - Lengthen stitch length.
* Darning plate is placed on needle place - Remove darning plate.
STITCHING PROBLEMS
Machine skips stitches.
* Needle is not all the way up into needle clamp.
-
See page
22 - 23.
* Needle is bent or blunt.
-
Replace needle (see page 22 -
23).
* Machine is not threaded correctly.
-
See page 18 - 19.
* Thread is caught in hook.
-
Clean hook (see page 60 - 61).
Stitches are irregular.
* Needle size is not correct for thread and fabric.
-
See page
22 - 23.
* 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 - 23.
* Needle is not all the way up into the needle clamp.
-
See page
22 - 23.
* Twin needle is being used but stitch width is set too wide.
-
See page 62 - 63.
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 22 - 23).
* Needle size is not correct for thread and fabric
-
See page 22
- 23.
Bobbin thread breaks.
* Bobbin case is not threaded correctly.
-
See page 16 - 17.
* Lint accumulates in bobbin case or hook.
-
Remove lint
(see page 60 - 61).
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.
