Procedures
Meeting
point
B A
I
Single
needle (two threads) I
I
Twin
needles (mock safety) I
7
Remove
needle plate.
A:
Distance between over looper point and needle
~enter
when over looper point
is
at needle plate top.
B:
Distance between
over
looper point
and
needle center
when
over
looper
is
at left extremity.
Over
spreader
fj
for two threads
is
abail-
able. Its meeting distance
is
the
same
as
that
of
over
looper.
Replace
over
looper with mock safety
stitch over looper.
~!
Meeting
point
~
Q'ty
of
screw_,.-------------------..
2
~
8
Make
sure
that, when
over
looper
CD
meets under looper
«;),
the point
of
over looper
will
pass
clear
of
under
looper about
0.1
mm
below its projected part.
9
In
case
of
above-mentioned measurement
is
wrong, direc-
2
tion ®
in
the
figure
at right,
move
over
looper back or
forth, direction
@
move
over looper driving
lever
up
or down,
and
fasten them.
* If there
is
a clearance
of
more than
0.1
mm
in
direc-
~
tion ®, stitches may
skip
due to the failure
of
catch-
Thread
ing
loops.
Even
if there
is
a clearance
of
0.1
to 1 mm
in direction
@,
loops
can
be picked up, but there
is
a
less
clearance between needle and over looper.
10
Install inside cover to flame. 2
~
DOUBLE CHAIN STITCH LOOPER MECHANISM
-20-
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