JUKI LU-1520N-7 Manual page 15

Adjustment Procedures
2) Top feed cam timing
1. Set the stitch dial to "6".
2. Set the alternate vertical dial to "3".
3. Remove the window plate setscrew and remove the window
plate and the window plate packing.
4. Loosen two setscrews 1 in the top feed cam.
5. Turn top feed cam 5 to the position where three points of top
end 2 of the needle eyelet, top surface 3 of the throat plate
and walking foot 4 (pressing face) are aligned with one another
on condition that the amount of alternate vertical movement of
both the walking foot and the presser foot is equal.
6. Securely tighten two setscrews 1 in the top feed cam.
(Standard) Screw No. 2 of top feed cam 5 faces just above
and screw No. 1 of top feed cam 5 faces to the direction of
the arrow when needle tip 2 and walking foot 4 align with
top surface 3 of the throat plate at the time of their going
up.
(Adjust the timing at the position where three points are
aligned with one another when top end 2 of the needle
and walking foot 4 are coming down.)
Results of Improper Adjustment
™ Pitch error at high or low speed
will be deteriorated.
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