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Croma24 Service Manual
Paper (Media) Axis Drive
Figure 2-2. Paper (Media) Axis Drive.
The Paper (Media) Axis Drive moves the plotting media in a direc-
tion perpendicular to the length of the printer. This friction drive
utilizes a micro-step drive technology and consists of a stepper
motor, reduction gears, lower drive shaft assembly, and pinch
wheels. This can be seen in Figure 2-2.
The micro-step technology associated with the stepper motor gives
the capability of a resolution up to 600 dpi.
The reduction gear meshes the stepper motor to the lower drive
shaft assembly which allows the media to advance or retract.
The purpose of the pinch wheels is to apply pressure to the media
onto the drive shaft assembly to reduce the chance of slipping.
Misaligned pinch wheels is the main cause of skewing of the media.
Theory of Operation
27
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