SINGER W167 - Manual (Page 31)

29
Trouble
Upper thread
breaking
Material
puckering
Probable cause
Improperly threaded.
Too much tension.
Starting with take up in
incorrect position.
Improper setting of needle.
Eye of needle too sharp.
Bent or blunt needle.
Tension too tight.
Dull needle.
Stitch length too long.
Correction
Refer to threading instructions see page 9
and rethread machine.
Loosen tension on upper thread by turning
thread tension knob to lower number.
Always start sewing with take up lever in
highest position.
Refer to needle setting instructions see page
6
.
Try a new needle.
Discard all blunt or bent needles and replace
with new one.
See tensions adjustment page 11.
Change needle.
Reduce stitch length.