Performance Checklist - Singer 8500Q Instruction Manual

PERFORMANCE CHECKLIST

GENERAL PROBLEMS
Machine does not sew.
* Power switch is turned off.
– Wait for 5 to 10 minutes and turn on the switch again.
* Buttonhole lever is not raised when sewing stitch patterns.
– Raise buttonhole lever. (see page 52 - 55).
* Buttonhole lever is not lowered when sewing buttonhole.
– Lower buttonhole lever. (see page 52 - 55).
Machine jams/knocks.
* Thread is caught in hook. - Clean hook. (see page 68 - 69).
* Needle is damaged. - Replace needle. (see page 21).
Fabric does not move.
* Presser foot is not lowered - Lower presser foot.
(see page 64 - 65).
* Stitch length is too short - Lengthen stitch length.
(see page 24 - 27).
* Feed dogs are lowered - Raise feed dogs. (see page 64 - 65).
STITCHING PROBLEMS
Machine skips stitches.
* Needle is not all the way up into needle clamp. (see page 21).
* Needle is bent or blunt. - Replace needle. (see page 21).
* Machine is not threaded correctly. (see page 16 - 19).
* Thread is caught in hook. - Clean hook. (see page 68 - 69).
Stitches are irregular.
* Needle size is not correct for thread and fabric. (see page 20).
* Machine is not threaded correctly. - (see page 16 - 19).
* Top thread tension is too loose. (see page 22 - 23).
* Fabric is being pulled or pushed against machine feeding
action. - Guide it gently.
* Bobbin has not been wound evenly. - Rewind bobbin.
(see page 12 - 13).
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 20).
* Needle is not all the way up into the needle clamp.
(see page 21).
THREAD PROBLEMS
Needle thread breaks.
* Machine is not threaded correctly. (see page 16 - 19).
* Top thread tension is too tight. (see page 22 - 23).
* Needle is bent. - Replace needle. (see page 21).
* Needle size is not correct for thread and fabric. (see page 20).
Bobbin thread breaks.
* Bobbin case is not threaded correctly. (see page 14 - 15).
* Lint accumulates in bobbin case or hook. - Remove lint
(see page 68 - 69).
Fabric puckers.
* Top thread tension is too tight. - Adjust thread tension.
(see page 22 - 23).
* Stitch length is too long for sheer or soft fabric. - Shorten
stitch length. (see page 24 - 27).
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