JUKI DDL-9000A Engineer's Manual page 9

Adjustment Procedure
1. Set the amount of feeding (feed dial graduation) at 0.
2. Loosen the setscrew
setscrew of the horizontal feed bracket shaft
3. The feed dog height and gradient are changed when both shafts of
the vertical feed bracket shaft
shaft are turned by means of a screwdriver.
4. After adjustments, firmly tighten the screws that have been loosened.
(Screw tightening should be done under the condition that the
setscrews and
shaft and the horizontal feed bracket shaft
(Cautions) 1. In regard to the locus of standard feeding, the throat
plate and the feed dog rise almost horizontally when
the throat plate rises.
2. The direction of the engraved marker dots for the
vertical feed bracket shaft
bracket shaft
(operator side).
3. If there is rattle in the vertical feed bracket shaft
and the horizontal feed bracket shaft
a cause of unusual sound and improper linearity.
of the vertical feed bracket shaft
and the horizontal feed bracket
are pushed against the vertical feed bracket
and the horizontal feed
should be adjusted on the right side
Results of Improper Adjustment
o If the gradient of the feed dog is
and the
.
o According to the shaft adjusting
.)
o According to the result of feed dog
o When the feed dog height is set
, this can be
o If the feed dog height is too much,
– 5 –
adjusted for either shaft only, the
feed dog height may be changed.
Adjustments are needed for both
shafts in all cases.
position, the position of feed dog
motion may be shifted.
In such a case, loosen the
tightening screw of the X feed
arm to adjust the position of
motion.
height or gradient adjustments,
there is possibility of interference
with the thread trimmer unit.
above the standard level, the
feeding power is improved.
Instead, there can be problems of
presser jumping at high speed and
flaws in light materials.
a return will be given to the front
side (Section C) of the feed dog.
As a result, the behavior of
material feeding may be affected.
If the height has to be increased
for an unavoidable reason, the
amount of return can be reduced
by adjusting the gradient of the
feed dog to raise its tip.
C
0.8mm DDL-9000A-
1.2mm DDL-9000A-SH
S, A