Adjusting The Needle Thread Feeding Device - JUKI LZ-2290CS Instruction Manual

❸
❹
❶

7-6. Adjusting the needle thread feeding device

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.
❸
❹
Almost alignment of
U-shape portions
❺
❷
❶
❷
❺
B
❸
A (8 to 11mm)
■ If the initial position of the moving knife is not
correct
Loosen the nut ❸ , and move the moving knife to
the right or left until the pin ❶ meets the marker dot
❷ . Then, tighten the nut ❸ .
(2) Adjusting the thread trimming timing
Put roller ❹ in the cam groove. Now, gradually turn
the handwheel in the reverse direction. The hand-
wheel will go no further when marker dot ❶ en-
graved on the handwheel cover is aligned with red
marker dot ❷ engraved on the handwheel.
To adjust the thread trimmer cam, align the red
marker dot on the handwheel cover with the red
marker dot on the handwheel, put the roller in the
groove of the thread trimming cam, and gradually
turn the handwheel in the direction opposite to the
direction of rotation of the hook driving shaft until it
will go no further. Now, tighten two screws ❺ .
■ Standard position of the feeding wire
1) Loosen screw ❶ .
2) Turn the feeding wire together with feeding wire
installing base ❷ , adjust the installing position of
the feeding wire so that a distance of A (8 to 11
mm) is provided between the top end of feeding
wire ❸ and the guide portion of thread take-up
thread guide ❹ , and tighten screw ❶ .
At this time, adjust so that the center of
U-shape portion of feed wire is almost
aligned with the center of U-shape por-
tion of thread guide.
■ When turning OFF the feeding device :
The needle thread feeding device can be placed in
OFF by setting the memory switch No. 88 to 0 (zero).
■ When needle thread feeding amount is de-
sired to be increased :
• Loosen setscrews ❺ and adjust so that clear-
ance B is reduced.
• Loosen setscrew ❶ and when the whole feeding
wire installing base ❷ is adjusted to the upward
direction (decrease the value, A), the feeding
amount can be increased.
– 112 –