Kenmore 1660 - Manual (Page 43)

NJ
Checking Performance Problems
what to do
PROBLEM PROBABLE CAUSE CORRECTION
Irregular
Stitches
Incorrect size needle.
Improper threading.
Loose upper thread tension.
Pulling fabric. '
Light pressure on presser foot.
Loose presser foot.
Unevenly ound bobbin.
Nicks or burrs on shuttle.
Nicks or burrs at hole of needle
plate.
Choose correct size needle for thread and fabric.
Rethread machine.^ ^ ^ ^ ^ ^
Tighten upper thread tension.
Do not pull fabric; guide it gently.
Increase pressurevbn presser foot.
Reset presser foot. ^ ^
Rewind bobbin.
Replace shuttle^ or polish off burrs completely.
Replace needle plate, or polish off burrs completely.
Breaking
Needle
Pulling fabric.
Inconect size needle.
Incorrect setting of needle.
Loose presser foot.: Do not pull fabric; guide it gently.
Choose correct size needle for thread and fabric.
Reset needle. '
Reset presser foot.
Bunching of
Thread
Upper and lower threads not drawn
back under presser foot before
starting seam.
When starting a seam be sure to draw both threads undbr and
back of presser foot about 4" and hold until a few stitches
are formed.
Puckering
Incorrect thread tension(s).
Light pressure on; presser foot.
Using two different sizes or kinds
of thread.
Bent or blunt needle.
Loose presser fo
0t^>
Fabric too'shecMT'Or too soft.
Reset thread tension(s). • "
Increase pressure on presser foot.
Upper thread and bobbin thread should be same size and kind.
Insert new needle.
Reset presser foot. , .
Use-underlay of tissue paper. .