Print Process; Drum Preparation - Xerox Phaser 8400 Service Manual

Print Process

Once an image has been processed and a printing bitmap created, a print cycle begins.
The Printhead and drum are brought up to their operating temperatures and the ink
levels in the ink reservoirs are checked. Ink is added from the Ink Loader, if necessary.
At the ready state, the print process consists of the following steps, which are
described in this section:
■

Drum Preparation

■
Printing
■
Paper Pick
■
Transfixing and Exiting
Warning
Keep your fingers away from the Y-axis drive system; it uses a
closed-loop servo drive system, which is inherently dangerous.
Since the motor speeds up if it senses the drive system slowing
down, fingers caught in the belts and gears can be severely
injured.
Drum Preparation
To prepare the drum, a thin coating of silicone oil is applied to the surface of the
drum. First the drum is rotated. Next, the oil roller and blade of the Drum
Maintenance System are raised into contact with the drum. To accomplish this, the
Process Drive rotates the drum maintenance camshaft lifting the oil and wiper blade
to the drum. The cams on the ends of the camshaft push against followers on each side
of the Drum Maintenance System, forcing the oil roller and blade against the drum.
The drum is rotated against the oil saturated roller.
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