Xerox ColorQube 9303 Series Service Manual page 1758

Head Maintenance
Figure 3. During head maintenance activities, the carriages are positioned for optimal purge
and wiping efficiency. The carriage drive system positions the carriages as required
The printheads are purged with a 4psi pressure purge to correct weak or missing jets. The
function of the printhead maintenance system is to wipe the printheads after ink purge to
remove waste ink and debris. The wiper moves in a wiper track that guides the vertical motion
of the wiper parallel to the printhead face during the jet stack wipe. The two wipers on the wiper
carriage wipe two heads at a time; both upper heads or both lower heads. The wiper drive sys-
tem moves the wiper carriage to the home position, to the upper heads, and to the lower
heads. The shuttling gearbox and cable / paddle system move the wipers in the cross-process
direction to align with either the upper or lower printheads.
printhead maintenance components.
Figure 3 Head maintenance components'
Principles of Operation
Carriage Motion
The carriages are supported by the MU drawer frames by two different methods. The lower
carriage is supported on either end by two support pins attached to the carriage end plates.
These pins slide along slots in the frames resulting in linear motion between functional posi-
tions. The upper carriage is supported by an arm on either end that pivots about a pin on the
drawer frames. The carriage drive system for each carriage incorporates a drive shaft con-
nected to crank links at either end of the carriage. This crank link is pined to another link that is
in turn pinned to the carriage. When the drive shaft turns, the carriage is moved left and right
as shown in
Figure 3 shows the location of the
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Figure 4.
Figure 4 Cross-process (X-axis) carriage motion
ColorQube® 9303 Family