Kodak 800 SERIES service manual Paper Media Axis Drive

NovaJet 800 Series Service Manual

Paper (Media) Axis Drive

Figure 2-2. Paper (Media) Axis Drive.

The Paper (Media) Axis Drive moves the plotting media in a direction 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 rollers. 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 9600 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 rollers is to apply pressure to the media onto the drive shaft assembly to reduce the chance of slipping.

Misaligned pinch wheels is a main cause of skewing of the media. For that reason the NovaJet 800 Series was designed with self aligning pinch rollers. As the media is fed forward, the rollers are aligned cor- rectly. However, these pinch rollers will not stay aligned while the media is being fed backwards.

Theory of Operation 2-4