Performance problems chart, What to do when – Sears 385.1883 User Manual
Page 125
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PERFORMANCE PROBLEMS CHART
What to Do When
PROBLEM
PROBABLE CAUSE
CORRECTION
Irregular Stitches
Incorrect size needle
Improper threading.
Loose upper thread tension.
Pulling fabric.
Loose presser toot
Unevenly wound bobbin.
Nicks or burrs at hola ot neadie piate.
Choose correct size needle tor thread and fabric.
Rethread machine.
Tighten upper thread tension.
Do not pull fabric; guide it gently.
Reset presser root.
Rewind bobbin.
Replace needle plate, or polish off burrs compielaty.
Breaking Needla
PuHirsg fabric.
Incorrect size needle.
Incorrect setting ot needle.
Loose presser toot.
Do not pull fabric; guide it gently.
Choose correct size needle lor thread and fabric.
Reset needle.
Reset presser toot.
Bunching of Thread
Upper and lower threads not drawn back
under presser loot betöre starting seam.
When starting a seam be sure to draw both threads under and
back
0
) presser tool about 4" and hold until a tew stitches are formed.
Puckering
Incorrect thread tension.
Using two difierent sizes or kinds of thread.
Bent or blunt needäe.
Loose presser toot.
Fabric too sheer or loo soft.
Reset thread tension.
Upper thread and bobbin thread should be same size and kind.
Insert new needle.
Reset presser toot.
Use underlay ot tissue paper.
Skipping Stitches
incorrect size needle.
Bent or blunt needle,
incorrect setting ol needle.
Tight upper thread tension.
Choose correct size needle tor thread and fabric
Insert new needle.
Reset needle.
Loosen upper thread tension.
Breaking Upper Thread
Starting to stitch too fast.
Improper threading.
Tight upper thread tension.
Incorrect size needle.
Sharp eye in needle,
Nicks or burrs at hole ot needle plate.
Start to stitch at a medium speed.
Relhread machine.
Loosen upper thread tension.
Choose correct size needle tor thread and fabric.
Insert new needle.
Replace needle plate, or polish off burrs completely.
Breaking Bobbin Thread
Improper bobbin threading.
Lint In bobbin holder or hook race.
Check bobbin threading.
Clean bobbin holder and hook race.
Fabric not Moving
The teed dog is not in the upper position.
Stitch Length set at 0.
Thread knotted under tabric.
Push-pull clutch IS disengaged.
Raise the teed dog with the drop lever.
Adjust Stitch Length Control.
Place both threads back under presser loot before beginning
to stitch.
Push in the clutch.
Machine Jamming Knocking Noise
Thread caught in hook race.
Lint in bobbirt holder or hook race.
Disassemble and clean hook race.
Clean bobbin holder and hook race.
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