SINGER W616 - Manual (Page 31)

T rouble Probable Cause
Correction
Upper Thread
Break ing
Improperly threaded Refer to threading instructions, see page No 8
and re thread machine.
Too much tension Loosen tension on upper thread by turning
t read tension knob to lower number.
Starting with take-up
in incorrect position
Always start sewing with lake-up lever in
highest position.
Improper setting of
needle Refer to needle setting instruction, see page No. 6 .
Bent or eye of needle
too sharp
Try a new needle.
Bent or blunt needle Discard all blunt or bent needles and replace
with new.
Material
Puckering
Tensions too fight
See tension adjustment, page No, 10,
Dull needle
Change needle.
Stitch length too long Reduce stitch length.