JUKI DDL-9000 Engineer's Manual page 34

(Adjusting the feed timing and dimensions of the feed base components
[Inclination and height of the feed dog]
* Standard adjustment value of the inclination of the
feed dog : Marker dot (6) in feed rocker base pin
(3) is positioned to the upper right 45˚ and marker
dot (5) in feed driving base pin (1) is positioned to
the right for reference. At this time,the inclination
of the feed dog is slightly raised to this side when
it starts going up from the top surface of the throat
plate and coming down from it.
* Making this side of the feed dog raised, bite of the fabric is improved and material slippage is decreased.
When improving puller effect with this side of the feed dog raised or changing the inclination in accordance
with the sewing conditions, loosen screws (2) and (4), and turn feed rocker base shaft (3) and feed driving
base shaft (1) with screwdriver to adjust it.
After the adjustment, fix the feed dog with screws (5) and (6) while lightly pressing with fingers feed driving and
feed rocker base shafts (1) and (3) to the rear side.
(Caution) If there is a play in the feed base, noise or defective straight stitching will result.
Fig. 1
Turn the marker dot in feed driving shaft base (1) in the upper direction to tilt the feed dog with its front up. (Fig. 1)
Turn the marker dot in feed driving shaft base (1) in the lower direction to tilt the feed dog with this side up. (Fig. 2)
However, if adjusting it with feed driving shaft base (1) only, the maximum height of the feed dog is changed.
Simultaneously perform the adjustment of raising and lowering the marker dot in feed rocker base shaft (3) when
you do not desire to change the height.
* The standard height of the feed dog is 0.8 to 0.85
mm. If the height of the feed dog is raised, feed
force is improved.However, jumping of the presser
foot at high speed or defects of light-weight
materials is likely to occur.
* If the height of the feed dog is excessively raised,
return on this side (section A side) of the feed
dog occurs and feed of materials may be affected.
If it is compelled to raise the height, adjust the
inclination of the feed dog with its front up to
decrease the return.
Max. front up
Max. this side up
Marker dot
Fig. 2
− 31 −
(1)
(5)
(2)
Marker dot
Marker dot
Marker dot
0.8 to 0.85
(6)
(3)
45˚
(4)
A