– 18 –– 18 –‒ 18 ‒
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow-
ing work after turning the power off and ascertaining that the motor is at rest.
1) Equally adjust clearance
A between needles
and
needle holes
in the throat plate.
2) Adjust the height of the needle bar so that the top end
of the needle hole of left-hand needle aligns with the
bottom end section of the looper when the looper trav-
els to the extreme right end and top end B of the looper
protrudes by approximately 1 mm from the left end of
the left-hand needle, remove the rubber cap
in the
face plate, and tighten needle bar bracket setscrew
to x the needle bar.
Unit : mm
Adjust the lateral position of rear needle guard
so that it
receives the needle within the range of B when the needle
is in its lowest position.
1) Adjust the height with setscrew
so that edge line A
of rear needle guard
enters in the needle hole of
right-hand needle when the needle bar is in its lowest
position.
2) Make rear needle guard
slightly come in contact with
the right-hand needle so that the clearance between
right-hand needle and top end
of the looper is 0 to
0.05 mm when top end
of the looper comes from the
extreme right end to the center of right-hand needle.
In addition, make rear needle guard
slightly come
in contact with the medium needle so that the clear-
ance between the medium needle and top end
of
the looper keeps 0 to 0.05 mm when top end
of the
looper comes to the center of medium needle.
Perform the adjustment with setscrews
and
.
9. Adjusting the rear needle guard
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the follow-
ing work after turning the power off and ascertaining that the motor is at rest.
A
B
C
2-needle 3-needle
Needle
gauge
Height of left-
hand needle, C
Needle
gauge
Height of left-
hand needle, C
3.2 9.7
4.0 9.3
4.8 8.8 4.8 8.8
5.6 8.5 5.6 8.5
6.4 8.0 6.4 8.0
Reference : Height from the top surface of the throat plate
to the top end of left-hand needle, C when
the needle is in the higher dead point is as
shown in the table.
8. Adjusting the height of the needle
0,1 - 0,3 mm
4,5 - 5,5 mm
16 - 18 mm
8,3 - 8,7 mm
B
A
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