Method and system for tracking a photoconductor belt loop in an image forming apparatus
AssigneeAetas Technology Incorporated
InventorsBobo Wang, Sheng-Jenq Chang, Chun-Chiang Chen
Life of this patent
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Abstract
The present invention is directed to a method and system for tracking a photoconductor belt loop in an image forming apparatus that effectively monitors and compensates for changes in the OPC belt's speed and position as well as for possible contamination of the code strip and damage to the photo sensors. There is provided a method and system for sensing a code strip on the photoconductor belt loop with a first sensor, producing a first signal, sensing a code strip on the photoconductor belt loop with a second sensor, producing a second signal, computing a phase shift error between the first and second signals; and synchronizing first and second signals.
Claims7
A method for continuously tracking the motion of a photoconductor belt loop in an image forming apparatus comprising:
- sensing a code strip on the photoconductor belt loop with a first sensor, producing a first signal;
- sensing a code strip on the photoconductor belt loop with a second sensor, producing a second signal;
- computing a phase shift error between the first and second signals;
- and
- synchronizing first and second signals.
A system for tracking the motion of a photoconductor belt loop in an image forming apparatus comprises:
- a first sensor having a first signal output;
- a means for converting the first signal output to provide position information of the photoconductor belt loop;
- a second sensor having a second signal output;
- a means for converting the second signal output to provide position information of the photoconductor belt loop;
- a means for synchronizing first and second signal outputs;
- and
- a means for comparing first and second signal outputs with one or more programmed parameters.
A system for tracking the motion of a photoconductor belt loop in an image forming apparatus comprises:
- a first sensor having a first signal output;
- a second sensor having a second signal output;
- a signal converter for processing the first and second signal outputs to provide position information of the photoconductor belt loop;
- a signal processor for synchronizing first and second signal outputs;
- and
- a signal controller for comparing first and second signal outputs with one or more programmed parameters.
Dependencies are inferred from the claim text.