Corded Overlock; Replacing The Cutting Knives - White 7234 Instruction Book

6. 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 iight needle, and sew on.
(2) Sew a narrow cord, positioning it on the edge
of the overlocked stitch.
7. 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 ower 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 O.5—1.O from the top of
biting position of lower knife.
Tighten the upper knife screw.
I-
plate
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