7.DIFFERENTIALFEED
Differential
feed
prevents
stretching
or
puckering
fabrics,
since
two
independent
feed dogs,
one
in
front
and
one
behind
the
needles,
can
be adjusted
to
feed
at
different
ratio.
This
function
produces
a
neat
finish
of
overlock
for
stretchable
and
lightweight
fabrics.
+
“N”
indicates
the
normal
position.
Refer
to
the
chart
below
and
test
stitch
performance
on
a
scrap
of
material
you
are
going
to
use.
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