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8.
CORDED
OVERLOCK
Corded
overlock
can
be
used
to
strengthen
stitches
when
joining
elastic
materials
such
as
knitted
fabrics.
There
are
two
ways
of
corded
overlock.
(1)
Place
the
slightly
wide
cord
(about
3mm)
under
the
right
needle,
and
sew
on.
(2)
Sew
a
narrow
cord,
positioning
it
on
the
edge
of
the
overlocked
stitch.
9.
REPLACING
THE
CUTTING
KNIVES.
The
upper
knife
and
lower
knife
are
made
of
a
special
long-lasting
steel
and
will
seldom
have
to
be
replaced.
However,
when
they
do
not
cut
the
fabric
even
though
they
are
set
in
the
right
posi
tion.
replace
them
in
the
following
way:
Before
replacing
the
knife,
be
sure
the
power
supply
plug
is
take
out.
Move
the
front
cover
to
the
right,
then
open
it
toward
you.
(1)
Replacing
the
lower
knife:
Loosen
the
lower
knife
clamp
screw
and
change
the
knife
for
a
new
one.
Align
the
top
of
the
lower
knife
with
the
top
of
the
needle
plate.
(2)
Replacing
the
upper
knife:
Move
the
upper
knife
to
its
lowest
position
by
turning
the
handwheel
towards
you.
Loosen
the
upper
knife
screw,
while
holding
the
upper
knife.
Change
the
knife
for
a
new
one.
Check
if
the
biting
position
A
of
upper
knife
is
positioned
downwords
0.5
1.0
from
the
top
of
biting
position
of
lower
knife.
Tighten
the
upper
knife
screw.
Lower
knife
clamp
screw
plate
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