The imagePRESS employs Canon's proprietary New ARCDAT real-time calibration system to maintain stable color output for large-volume, multiple-page printing jobs. By detecting the density of a patch on each photosensitive drum, the technology corrects for deviations from the ideal density to maintain a constant halftone density. The New ARCDAT system controls all the preinstalled screen patterns for reproducing gradations and continually measures the absolute values of tone and density deviations.

This makes possible the real-time control of image density, enabling the maintenance of a constant density without compromising productivity.

Overview of New ARCDAT Control

The Automatic Toner Replenisher (ATR), which monitors toner replenishing status, also controls density to match changes in internal temperature and humidity based on video count information from the controller and data from sensors in the developing unit and photosensitive drums. In addition, the digital density correction function automatically controls the light intensity of the main scanning laser for significantly improved image-density uniformity.