– 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
❶
and
needle holes
❷
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
❹
in the
face plate, and tighten needle bar bracket setscrew
❸
to fix the needle bar.
Unit : mm
Adjust the lateral position of rear needle guard
❶
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
❷
so that edge line
A
of rear needle guard
❶
enters in the needle hole of
right-hand needle when the needle bar is in its lowest
position.
2) Make rear needle guard
❶
slightly come in contact with
the right-hand needle so that the clearance between
right-hand needle and top end
❸
of the looper is 0 to
0.05 mm when top end
❸
of the looper comes from the
extreme right end to the center of right-hand needle.
In addition, make rear needle guard
❶
slightly come
in contact with the medium needle so that the clear
-
ance between the medium needle and top end
❸
of
the looper keeps 0 to 0.05 mm when top end
❸
of the
looper comes to the center of medium needle.
Perform the adjustment with setscrews
❷
and
❹
.
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.
❸
A
B
C
❶
❷
A
❹
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
A
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
❶
❸
❹
B
❷
A
❶
❸
❶
