JUKI AMS-221F-2516 Instruction Manual page 85

❷
❶
❸
❹
0 mm
0.05 to 0.1 mm
❹
0.3 to 0.6 mm
❹
❸
❷
❺
0 mm
❻
❶
❺
❹
❼
❾
❽

7.5 mm
0.5 mm ❻
B
Loosen setscrew ❶ in the driver. Drawing
2)
bobbin case opening lever hook ❷ toward
you, open it to the right and left until bobbin
case opening lever ❸ comes off.
At this time, be careful not to let
shuttle ❹ come off and fall.
Driver ❻ receives the needle on its front end
3)
face to prevent the needle from bending.
Adjust so that the blade point of shuttle ❹ is
aligned with the center of needle ❺ and so
that a clearance provided between the front
end face of driver and the needle becomes
almost 0 (zero) mm. Then, tighten setscrew
❶ of driver.
Loosen hook driving shaft s ❾ . Adjust the
4)
longitudinal position of driver ❻ by turning
driver adjustment screw  clockwise or coun-
terclockwise.
Adjust the clearance mentioned in the above
step 3) to 0 (zero) mm. Then, tighten hook
driving shaft setscrew ❾ .
Loosen shuttle race screw ❼ , and adjust the
5)
longitudinal position of the shuttle race. To do
this adjustment, turn shuttle race adjusting shaft
❽ clockwise or counterclockwise to provide a
0.05 to 0.1 mm clearance between needle ❺
and the blade point of shuttle ❹ .
6) After adjusting the longitudinal position of
shuttle race, further adjust to provide a 7.5
mm clearance between the needle and the
shuttle race. Then, tighten screw ❼ of shuttle
race.
7) When changing the number of needle from
the number at the time of standard delivery or
using a new driver, perform the adjustment of
the height of driver.
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