– 9 –
13. RELATION BETWEEN THE NEEDLE AND THE LOOPER
2 mm
1
2
3
5
7
6
8
4
8
0.05 mm
1
3
1
3
9
WARNING :
To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and check to be sure that the
motor has totally stopped rotating in prior.
Standard position of the looper:
When the needle
1
goes up 2 mm from its lowest position,
1) The looper point
3
must align with the needle
1
center and
2) The looper point
3
must be 2 mm away from the top end of the
needle eye.
8. Align the looper point
3
with the needle
1
center in this position.
9. Leave a clearance of 0.05 mm or less between the looper point
3
and the needle
1
.
10. Securely tighten the looper holder screws
9
.
Adjustment of the looper position:
1. Turn the handwheel until the needle bar
4
reaches its lowest posi-
tion.
2. Loosen the needle bar connection screw
5
.
(Determine the needle bar height)
3. Align the upper mark line
6
of the needle bar
4
with the bottom
end of the needle bar lower bushing
7
.
4. Tighten the needle bar connection screw
5
.
(Determine the looper position)
5. Loosen 2 setscrews of the looper holder (see above
fi
gure of last
page) so that the looper
2
can be rotated by hand.
6. By holding the looper
2
with your
fi
ngers in the thread hooking
position.
7. Turn the handwheel until the lower mark line
8
of the needle bar
4
aligns with the bottom end of the needle bar lower bushing
7
.
4
Determine the needle bar height
Determine the looper position
(Align the looper point with the needle center in this position.)
ii
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