What to do when, Performance problems chart – Sears KENMORE 385.12814 User Manual
Page 71
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What to Do When
performance
problems
chart
PHOBLEM
PROBABLE CAUSE
CORRECTION
Skipping Sliiohes
Incorrect Size needle.
Beni or blunt needle.
Incorrect needle instalafion.
Tight upper thread tension.
Choose correct size needle tor thread and fabric.
Insert new needle.
Reinstall needie.
Loosen upper thread tension.
Breaking Upper Thread
Starting to stitch too fast,
improper threading.
Tight upper thread tension.
Incorrect Size needie.
Sharp eye in needle.
Nicks or burrs on shuttle.
Nicks or burrs at hole o1 needie plate.
Start to stitch at a medium speed.
Rethread machine.
Loosen upper thread tension.
Choose correct size needie tor thread and fabric,
insert new needle.
Replace shuttle, or polish off burn completely.
Replace needle plate, or polish off burrs completely.
Breaking Bobbin Thread
Improper bobbin case threading.
Lint in bobbin case or shuttle.
Check bobbin case threading.
Clean bobbin case and shuitie.
Fabric noi Moving
Darning plate in place.
Stitch Length set at "0".
Thread knotted under fabric.
Remove darning plate.
Adjust Stitch Length Conlroi.
Place both threads back under presser toot betöre beginning to stitch.
Machine Jamming; Knocking Noise
Thread caught in shuHle.
Lint in bobbin case or shuttle.
Disassemble and clean shuttle.
Clean bobbin case and shuHle.
trreguiar Stitches
incorrect size needle,
improper threading.
Loose upper thread tension.
Pulling tabnc.
Loose presser foot.
Unevenly wound bobbin.
Nicks or burrs at hois ot needle plate.
Use correct size needle tor thread and fabnc.-
Relhread machine-
Ttghien upper thread tension.
Do not pul! fabno; guide it gently.
Reset presser toot.
Rewind bobbin.
Replace needle plate, or polish off burrs completely.
Breaking Needle
Pulling fabric,
incorrect size needie.
incorrect needie Instalation.
Loose presser toot.
Do not puil fabric; guide it gently.
Choose correct size needle for thread and fabnc.
Reinstall needle.
Tighten presser toot.
Thread Bunching
Upper and lower threads not drawn back
under presser foot before stading seam.
When starting a seam be sure to draw both threads under and
back ot presser foot about 4“ and hold until a few stitches are formed.
Puckering
tncorreot thread tension is).
Using two different sizes or kinds of thread.
Bent or blunt needle.
Loose presser foot.
Fabric very sheer or very soft.
Reset thread lension(s).
Upper thread and bobbin thread should be same size and kind.
Insert rrew needle.
Tighten presser toot.
Use underlay of tissue paper.
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