Procedures
Temporarily fasten double chain stitch looper holder 0
on longitudinal feed shaft 8
2 Install double chain stitch looper 0 by inserting it
all
the way into double chain stitch looper holder
0.
The
inclination
of
the looper depends on the screw recess.
3
I~stall
double chain stitch needle into needle clamp.
Ill The below items
of
8
and
(i) should be taken simul-
taneously.
4
In
case
of
standard specifications, make
an
adjustment
so
that the distance between the looper point and the
center
of
needle
is
1.5mm when double chain stitch
looper comes to the leftmost position. In
case
of
high-
lift specifications, that distance
is
1.3
mm.
(Sidewise potioning)
5 Position the looper
so
that, when the looper point
is
in
line with the needle center on the needle's upward travel,
the looper point will
be
at about 0 to 0.05 mm from
needle, and then fasten double chain stitch looper holder.
(Longitudinal positioning)
*
When
stitch-skips occur, adjust it that the looper point
will hit needle about
0.05 to 0.1
mm
deep.
6 Install double chain stitch needle guard (F) 8 to that
of
(B) (i) in order to make clearance about 0.3 to
O.Smm.
7 Temporarily fasten double chain stitch needle guard (B)
to needle plate support bracket.
8 Match the looper point with the needle center on the
needle's upward travel, hold double chain stitch needle
guard (B) in contact with the needle, adjust the clearance
between the looper point and the needle
to
0
to
0.05 mm,
and fasten double chain stitch needle guard
(B)
securely.
~
KNIVES MECHANISM
Q'ty
of
screw
1
-21-
®
L__®
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