Operation Manual

iii
3.
Needle
Breaks
Cause:
Bent
needle
strikes
point
of
sewing
hook.
Needle
too
thin
or
thread
too
heavy.
Fabric
pulls
needle so
it bends and
strikes
needle
plate.
Bobbin
case
inserted
incorrectly;
4.
Faulty
Stitch
Formation
Ca
use:
Improper
tension.
Thread
too
heavy,
knotty
or
hard.
Bobbin
unevenly
wound.
Pieces
of
thread
between
tension
discs.
Remedy:
Replace
needle
at
once
to
prevent
further
damage.
Use
correct
needle
and
thread
sizes.
Don’t
force
the
feeding
motion.
Guide
the
material
lightly.
Push
bobbin
case
until
you
hear
it snap
into
place.
Remedy:
Adjust
tensions
as
instructed.
Use
only
first-rate
thread
—
the
correct
size
for
the
needle
and
fabric.
Don’t
run
thread
over
finger
when
winding
the
bobbin.
(For
instructions
see
page
11).
Raise
presser
bar
lifter
and
remove
thread.
5.
Machine
Feeds
Improperly
Cause:
Machine
does
not
feed
because
stitch
length
control
set
on
“0”.
Accumulations
of
lint
packed
between
feed
teeth.
Remedy:
Regulate
stitch
length, as
desired.
Take
off
needle
plate
and
remove
lint
with
a
stiff
brush.
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