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31O.
Standard
Chart
for
the
Thread
Tension
The
tension
for
each
of
the
thread
tension
dials
should
be
different
according
to
the
pattern
stitches
as
in
the
chart
on
the
right.
Since
the
figures
in
the
chart
are
for
average
strength
of
threads
tension,
it
may
be
necessary
to
adjust
the
thread
tension
a
litte.
Thread
tensions
will
differ
according
to
the
kind
of
fabric
and
the
thread.
The
differential
feed
ratio
is
normally
‘N’.
(See
P.11).
4.
SETTING
WASTE
TRAY
-
-
(_
a
—f
/
(1)lnsert
the
right
guide
a
of
the
waste
tray
to
the
right
leg
of
the
overlock
machine
as
illustrated.
Turn
the
waste
tray
in
the
direction
of
arrow.
(2)Push
the
left
end
of
the
waste
tray
in
the
direc
tion
of
arrow.
OVEREDG-
ROLL
FINE
ROL
ING
HEMMING
HEMMING
2.5-5mm
1-15mm
1-15mm
PATTE
RI’
STITCH
ES
STITCH
LENGTH
NEEDLE
THREAD
UPPER
THREAD
LOOPER
TENSION
THREAD
LOWER
LOOPER
THREAD
2-4
1-4
1-4
1-4
1-4
2-4
2-4
5-8
2-4
—14--