White 535 - Page 34

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