JUKI LU-1510N-7 Engineer's Manual page 25

Adjustment Procedures
1) Horizontal feed cam timing
o In case of LU type machines other than LU-1508NH and LU-
1509NH
1. Set the stitch dial to the maximum.
2. Loosen two setscrews
cam.
3. Turn the handwheel to bring the needle bar to the lowest dead point
of its stroke.
4. Turn feed eccentric cam
dog no longer moves even when the reverse feed control lever is
moved.
5. Securely tighten two setscrews
cam.
(Standard) The setscrew No. 1 in the horizontal feed eccentric
cam faces almost right above at the lowest dead point
of the needle bar.
o In case of LU-1510NA-7
1. Set the stitch dial to "6".
2. Loosen two setscrews
cam.
3. Turn the handwheel and adjust the positioning so that the needle
meets the blade point of the hook.
4. Turn feed eccentric cam
dog no longer moves even when the reverse feed control lever is
moved.
5. Securely tighten the feed eccentric cam setscrew
o In case of LU-1508NH and LU-1509NH
1. Set the stitch dial to the maximum.
2. Loosen two setscrews
3. Turn feed triangle cam
no longer moves even when the reverse feed control lever is moved.
4. Securely tighten setscrew
(Standard) The screw No. 1 in the feed triangle cam faces almost
right above at the lowest dead point of the needle bar.
(Caution)
1. If the cam slips in the axial direction at the time of adjustment,
torque becomes heavy. So, be careful.
2. Adjust the horizontal feed rod so that it comes almost in the
center between the edge of horizontal feed cam lid
that of horizontal feed eccentric cam.
3. After adjusting the horizontal feed timing, re-adjust the verti-
cal feed timing.
(2pcs.) in the horizontal feed eccentric
and adjust the timing so that the feed
in the horizontal feed eccentric
(2 pcs.) in the horizontal feed eccentric
and adjust the timing so that the feed
in the feed triangle cam.
and adjust the timing so that the feed dog
in the feed triangle cam.
Results of Improper Adjustment
o Pitch error at high or low speed is
o Needle thread tension will vary.
o Stitch tightness at normal and re-
.
and
– 21 –
apt to occur.
verse feed will vary.