Xerox ColorQube 9303 Series, Service Manual

Page: 1760 / 1812

February 2013
8-66 ColorQube® 9303 Family
Principles of Operation
To select an output ( Figure 7 and Figure 8 , upper or lower carriage), the DC motor is activated
moving the output selection slide completely in one direction until the appropriate feature on
the top of the gear runs into a mating surface on the gearbox cover. The inclined slide surface
pushes on the upper cog spring driving the cog gear down to mesh with it's mating cog gear.
Each upper cog gear is connected to a reduction section (two compound gears) and through
idlers to the output gear that is connected to the carriage drive shafts.
Figure 7 Gear rotation upper carriage
Figure 8 Gear rotation lower carriage
A home sensor is employed to initialize carriage motion. The sensor is located on the front
frame of the Marking Unit, and detects home position via a feature molded into the underside
of the Upper and Lower Carriage Output Gears.
Upper and Lower Carriages
The SFWA and carriage are known as the SFWA-Carriage when assembled together. SFWA
refers to the inner, moving portion, which holds 2 printheads. The SFWA travels along the x-
axis while supported by the carriage. The carriage provides a structure that is fixed to the drum
frame during printing. The carriage retracts away from the drum to allow printheads to be
purged and wiped clean. In addition, there is a carriage position farthest from the drum in which
the SFWA is locked to the service drawer frame. This restrains the SFWA-Carriage and x-axis
relative to the drawer structure during shipping.