JUKI LU-1520NCS-7, Инструкция по эксплуатации

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8. ATTACHING THE NEEDLE
Long groove
❶
❷
1) Turn the handwheel to bring the needle bar to the
highest position of its stroke.
2) Loosen needle clamp screw ❷ , and hold needle
❶ so that the long groove in the needle is facing
exactly to the left.
3) Push needle ❶ deep into the needle clamp hole
until it will go no further.
4) Tighten needle clamp screw ❷ firmly.
(Caution) When replacing the needle
❶
, check the clearance provided between the needle
❶
and the
blade point of hook. (Refer to "19. NEEDLE-TO-HOOK RELATION" p. 16 and "20. ADJUSTING
THE HOOK NEEDLE GUARD" p. 17 .)
If there is no clearance, the needle ❶ and the hook will be damaged.
(9) Adjusting the amount of oil in the hook
1) Turn the oil amount adjustment screw
to
adjust the amount of oil in the hook.
Turning the screw clockwise will decrease the
amount of oil in the hook or counterclockwise
will increase it.
2) The appropriate amount of oil, when a sheet
of paper is placed near the periphery of the
hook, is to such an extent that splashes of oil
from the hook appear in approximately five
seconds as shown in the figure on the left.
(10) Height of the screw of oil quantity distributor
1) The height of the screw of oil quantity distribu-
tor has been factory-adjusted at the time of
assembly. Do not change it.
(Reference)
The distance between the lower edge of oil
quantity distributor to the screw tip: 7 ± 1 mm
Oil splashes
Increase Decrease
Toward the hook
Toward the
upper section
of sewing
machine
7 ± 1 mm
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.