~-
Needle Clearance
Adjustment
Loosen the set collar screw 0 and move
the looper to adjust the clearance
be-
tween the needle arid the tip of the looper
to
0.03
to
0.08
mm when the tip of the
looper is
in
line with the center of the
needle.
!§].
Sub-Tension Adjustment
Reference line
1.
Check to see
that
the reference line
on the needle
bar
drive lever 0
matches the reference line on the
needle
bar
drive lever shaft
f).
If
these reference lines
are
unaligned,
make an adjustment by loosening the
hexagonal bolts
8 and
8.
~-
Needle Guard Adjustment
Loosen the screw
f)
and move the needle
guard
0 to adjust the clearance between
the needle and the needle guard
0 to
about
0.1
mm.
0
0
To decrease
~-Thread
Looper Timing
Adjustment
1.
Loosen the screw
O.
and align the
reference line on the groove cam
8
with
that
on the looper shaft
f).
2.
Loosen the screw
8.
and align the
reference line on the thread looper
triangle cam
8 with
that
on the looper
shaft
f).
IZJ.
Button Clamp Lifter
Adjustment
----~-=--a.:~~
·-~~
2.
Turn
the pulley by hand to raise the When raising
or
lowering the button
needle
bar
until the top of the needle clamp by means of the pedal.
bar
0 is
44
to
48
mm above the top
1.
Remove the screw
0.
move it into the
end of the needle
bar
upper bushing hole
f),
and retighten the screw
0.
0.
At
this time, the tension disc must
begin to float. Loosen the screw
8
and turn the sub-tension stud G until
the above-mentioned timing
is
ob-
tained.
*In
case a TQ X 7 needle is used, the
tension disc must begin floating when
the top of the needle
bar
is
54
to
58
mm above the top of the needle
bar
upper bushing.
-6-
2.
Hook the chain 8 into the hole
in
the
button clamp connecting rod
e.
*The
pedal and chain
are
optional.
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