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1-3. Adjusting the needle-to-shuttle relation
CAUTION
:
Turn O�� the power before starting the work so as to prevent accidents caused by abrupt
start of the sewing machine.
Relation between needle and engraved lines
3
2
3 3
1
4
5
0 mm
5
0.05 to 0.1 mm
4
7.5 mm
!0
9
1
4
3
2
0 mm
6
1
7
8
!0
– 124 –
1)
Turn the handwheel by hand. When needle
bar 1 has gone up, adjust so that lower
marker line 2 engraved on the needle bar
aligns with the bottom end of the needle bar
bushing, lower 3 .
2)
Loosen setscrew 1 in the driver. Open inner
hook pressers 2 to the right and left, and
remove inner hook presser 3 .
At this time, be careful not to let inner
hook 4 come off and fall.
3)
Adjust so that the blade point of inner hook 4
aligns with the center of needle 5 , and that
a clearance of 0 mm is provided between the
front end of the driver and the needle as the
front end face of driver 6 receives the needle
to prevent the needle from being bent. Then
tighten setscrew 1 of the driver.
4)
Loosen setscrew 7 of the shuttle, and adjust
the longitudinal position of the shuttle. To do
this adjustment, turn shuttle race adjusting
shaft 8 clockwise or counterclockwise to
provide a 0.05 to 0.1 mm clearance between
needle 5 and the blade point of inner hook 4 .
5)
After adjusting the longitudinal position of the
shuttle, further adjust to provide a 7.5 mm
clearance between the needle and the shuttle
by adjusting the rotating direction. Then
tighten setscrew 7 of the shuttle.
Apply a small amount of oil to race
section 9 and oil wick !0 , and use the
sewing machine after an extended pe-
riod of disuse or cleaning the periph-
ery of hook portion.
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