Xerox Phaser 8560MFP Service Documentation page 285

Process Drive
The Process Drive is an open loop system that transmits torque to two main camshaft assem-
blies. One camshaft assembly controls the Transfix Roller loading, and the other controls the
Drum Maintenance system and Printhead tilt system. A small DC servo motor powers the pro-
cess drive gearbox to rotate the gears to specific positions during the printing process. The
process drive is able to actuate each camshaft system independently or concurrently through
the use of the swing arm in the gear train. Operation of the transfix and drum maintenance sys-
tem is controlled by the rotational direction of the motor.
When the process motor rotates in one direction, the swing gear engages the lower gears.
When the motor rotates in the opposite direction, the upper gears are engaged.
Since the system is open loop, special attention to the home position of the Process Drive
gears and the mating camshaft gears is critical. The Process Drive gearbox is mechanically
keyed upon installation via gear orientations. These gear orientations allow the subsystems to
self home during operation. If either the gearbox or cam gears is out of home during installa-
tion, the system does not function properly.
Figure 7 Process Drive Assembly
Initial Issue
Phaser 8510/8560MFP Multifunction Product
Media Drive Assembly
The Media Drive gearbox and motor assembly controls each roller in the paper transport sys-
tem. A gear train located behind the motor connects it to the exit rollers, which are built into the
Exit Module. Gear trains located within the Media Drive Assembly, along with two clutches and
a solenoid, allow the motor to control the Pick, Take Away, Duplex, and deskew rollers. A
unique swing gear allows the Pick and Take Away roller to rotate in the same direction regard-
less of the direction the motor is rotating.
Figure 8 Media Drive Assembly
10/2006
8-13
Theory of Operation
Image Output Terminal