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29 March 1996 Strategy for tandem color registration
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Proceedings Volume 2658, Color Imaging: Device-Independent Color, Color Hard Copy, and Graphic Arts; (1996)
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States
This writing describes a strategy for color registration and motion control for tandem xerography. The strategy is based on an intelligent closed-loop controller which automatically calibrates the machine against repeatable errors and compensates for long term errors due to drift. Registration errors are measured by means of a dedicated sensor. Repeatable steady and periodic, errors are characterized at long intervals and compensated by feedforward techniques. Long term drifting errors are periodically detected and corrected. Feedback control is used to counteract unexpected and uncalibrated disturbances. Measurements taken on an experimental breadboard show that registration of four xerographic engines can be maintained to within 45 microns, and that color and gray banding can be eliminated. This limit of registration accuracy is mostly due to stretch of the intermediate belt under the action of image dependent transfer forces.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vittorio Castelli, Jan deJong, and Lloyd Williams "Strategy for tandem color registration", Proc. SPIE 2658, Color Imaging: Device-Independent Color, Color Hard Copy, and Graphic Arts, (29 March 1996);

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