Corded overlook, Replacing the cutting knives – SINGER WSL7234 User Manual

Page 20

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6. CORDED OVERLOOK

Corded overlook 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 overlooked 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 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.

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