White SM2000 - Page 56

Section
7
nI_____
PROBLEM
PROBABLE
CAUSE
CORRECTION
Fabric
puckers
Upper
or
lower
thread
tension
too
tight
P.12,
P.51
Stitch
too
long
for
material
P.22
Thread
too
thick
P.20
Incorrect
threading
of
upper
or
lower
thread
P.7,
P.16
Breaking
needle
Needle
not
correctly
inserted
P.
18
Needle
bent
P.
18
Needle
clamp
screw
too
loose
P.18
Upper
thread
tension
too
tight
P.12
Needle
too
fine for
the
material
P.20
Dials
have
been
changed
while
the
needle
was
down
in
the
P.22
material
If
trouble(s)
cannot
be
corrected,
please
consult
your
nearest
dealer.
Do
not
attempt
to
correct
fault(s)
on
your
own.