JUKI LK-1900B series, Руководство инженера

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Adjustment procedures Results of Improper adjustment
1. Turn the pulley by hand. When needle bar ❶ has gone up, adjust
so that lower marker line ❷ engraved on the needle bar aligns
with the bottom end of the needle bar bushing lower ❸ .
2. Loosen setscrew ❹ in the driver ❾ . Open inner hook pressers
❺ to the right and left, and remove inner hook presser ❻ .
(Caution) At this time be careful not to let inner hook ❼ come
off and fall.
3. Adjust so that the blade point of inner hook ❼ aligns with the
center of needle ❽ , and that a clearance of 0 mm is provided be-
tween the front end of the driver ❾ and the needle ❽ as the front
end face of driver ❾ receives the needle ❽ to prevent the needle
from being bent. Then tighten setscrew ❹ of the driver ❾ .
4. Loosen setscrew of the shuttle, and adjust the longitudinal
position of the shuttle. To do this adjustment, turn shuttle race
adjusting shaft
clockwise or counterclockwise to provide a 0.05
to 0.1 mm clearance between needle ❽ and the blade point of
inner hook ❼ .
5. After adjusting the longitudinal position of the shuttle, further
adjust to provide a 7.5 mm clearance between the needle ❽ and
the shuttle by adjusting the rotating direction. Then tighten set -
screw of the shuttle.
(Caution) Apply a small amount of oil to race section and oil
wick , and use the sewing machine after an extend -
ed period of disuse or cleaning the periphery of hook
portion.