SINGER W612 - Manual (Page 34)

32
Т rouble
Upper Thread
Breaking
Material
Puckering
Probable Cause
Improperly threaded
Too much tension
Starting v/ith take-up
in incorrect position
Improper setting of
needle
Bent or eye of needle
too sha rp
Bent or blunt needle
Tensions too tight
Dull needle
Stitch length too long
Correction
'^If¡7"í7"th7¡^dm¡^^ page N 0 , 8 .
and rethread machine.
Loosen tension on upper thread by
thread tension knob to lower numc
Always start sewing with take-up
highest position.
Refer to needle setting .nstajctson
No.
Try a new needle.
Discard all blunt or bent needles and replace
with new.
See tension adjustment, page No. 10.
Change needle.
Reduce stitch length.