JUKI HZL-NX7, Руководство по обслуживанию

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6-9 Clearance between the needle and the blade point of hook
○
Remove the face cover and the throat plate.
Adjustment procedure
1. Loosen screw
❶
. Adjust the clearance between the needle and the blade point of the hook to 0.02 to 0.07
mm by turning adjusting shaft ❷ .
Left needle position Right needle position Right needle position Left needle position
If the clearance is larger at the right needle
entry point, shift ❹ to the right.
If the clearance is larger at the left needle
entry point, shift ❹ to the left.
Adjustment procedure
1. Select No. 2: FAGOTT of the service mode.
2. Gradually turn adjusting shaft
❷
to find a position where the needle deviates slightly. Now, temporarily
tighten screw
1
.
3. Slightly loosen setscrew ❸ . Adjust the lateral balance of the needle bar by slightly moving right-left adjust -
er
❹
while carefully listening to the noise produced when the needle deviates at the right and left needle
entry points. Then, securely tighten setscrew ❸ .
4. Additionally turn shaft
❷
and securely tighten screw
❶
at the position where the needle does not deviate.
5. Lightly tap P section with fingers. If you hear a needle deviation noise at the right and left needle entry
points, the optimum clearance is provided between the needle and the hook.
❷
❹
❸ P section
Adjusting the balance of the clearances at the right and left needle entry points
1. Select the zigzag pattern and set the zigzag width to 7 mm. Adjust the balance of the clearances provided
between the needle and the blade point of the hook at the right and left needle entry points.
0.02 to 0.07 mm
❶
❷
❶