Xerox ColorQube 9303 Series Service Manual page 1724

Figure 9 Dust abatement system
Service Access
The abatement plenum is located directly below the drum between the IOD and the cleaning
unit. It is removed by removing the cleaning unit, then pull the cleaning unit handle while pulling
the abatement plenum to the right.
Drum Imaging
Drum Oiling
Figure 10. To prepare the Drum to receive an image, a thin coating of silicone oil is applied to
the Drum surface. To oil the Drum, the Drum is rotated by the Drum Motor. The drum mainte-
nance camshaft is rotated. Cams on each end of the drum maintenance camshaft contact fol-
lowers on the oil roller and blade forcing both against the drum. The blade followers,
independent of the oil roller followers, use small springs to regulate the pressure being applied
to the surface of the drum.
As the drum continues to rotate, excess oil is removed by the blade and captured in the clean-
ing unit reservoir. The blade distributes an even coat of oil across the surface of the drum.
Principles of Operation
Blade
Oil Roller
Imaging Resolution
Four printheads create an image on the drum. Each printhead contains 300 jets per inch
arranged in an array, providing a total jet count per printhead of 880 (3520 jets for the complete
4-head imaging system). The printheads operate at 41kHz, jetting ink onto the drum. Each
Printhead creates a portion of the image. Pixel matching, monitored by the IOD Sensor,
ensures a seamless stitching together of Printhead output to deliver a single image. The image
resolution achievable using a single pass is 75dpi.
To increase image resolution in the cross process direction, the image is built up using several
passes to achieve the required image resolution. At each pass of the image by the printheads,
the printheads are slightly offset to avoid the build-up of ink drops on top of each other.
February 2013
8-30
Drum
Drum Maintenance
Camshaft
Figure 10 Drum Oiling
ColorQube® 9303 Family