Clearance Between Needle And Hook Point - Janome JP720 Servicing Manual

Mechanical Adjustment

Clearance between Needle and Hook Point

* The clearance between the needle and the point of hook should be –0.1 to +0.05 mm.
Preparation:
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1. Remove the needle plate, bobbin holder, and bed cover, and replace the needle with the test pin .
2. Turn the power switch on, and select pattern (simple zigzag). (maximum zigzag width)
Adjustment procedure:
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1. Loosen the screws q , w , e , then slightly tighten the hinge screw .
2. Turn the handwheel toward you to bring the hook point behind the needle. Adjust the clearance between the test
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pin and the point of the hook in the left and right needle position to –0.1 to +0.05 mm by moving the hook
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set plate up or down.
3. Tighten the setscrews q w , , e .
4. Check the backlash of the hook, gear and lower shaft gear. (See. page 14).
5. Attach the bed cover, needle plate and bobbin holder, and remove the test pin.
r
t
–0.1 to +0.05 mm
e
y
w
q
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