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2. Adjusting the needle-to-shuttle relation
WARNING :
Turn OFF 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
1
2
2 3
1
4
0 mm
5
0.05 to 0.1 mm
7.5 mm
!0
9
3
1
2
4
2
5
0 mm
6
1
4
7
8
!0
) 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 3 , lower.
2) Loosen setscrew 1 in the driver. Open inner
hook pressers 2 to the right and left, and re-
3
move 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. 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 clear-
ance between the needle and the shuttle by
adjusting the rotating direction. Then tighten set-
screw 7 of the shuttle.
Apply a small amount of oil to race sec-
tion 9 and oil wick !0 , and use the sew-
ing machine after an extended period of
disuse or cleaning the periphery of hook
portion.
32
－
－
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