Theory of Operation 2-9
X-Axis or lateral movement of the printhead is accomplished using a stepper motor
driving a fine-thread screw system. The printhead, mounted to the X-Axis shaft,
moves laterally across the surface of the drum.
To find the printhead home position, the X-Axis system drives the printhead in an
open-loop. The printhead is driven against the left printer frame for a few seconds,
and then reversed a set distance. A tension spring links to the printhead’s left shaft and
provides a preloaded tension to allow the printhead to move smoothly.
s8500-014
Tension Spring
X-Axis
Shaft
X-Axis Hook
X-Axis
Shaft
X-Axis
Motor
Drum
Printhead
Nose
Cone
Gear
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