Patent ID: 6142078
Filing Date: 2000-11-07
Classification: B41F,B41P

Abstract:
An adaptive control system for use in conjunction with a printing press to control the setting of an ink control device that regulates the amount of ink applied to a substrate so that a measured ink color value on the substrate converges toward a target ink color value, the system comprising:a controller using at least one gain parameter and operating to calculate a new setting of the ink control device based upon the at least one gain parameter and an ink color value difference that is the difference between the measured ink color value and the target ink color value; anda sensitivity adapter in communication with the controller to adaptively modify the at least one gain parameter, wherein the sensitivity adapter calculates a sensitivity variable that is multiplied by the at least one gain parameter, wherein the sensitivity variable at time (t+1) is determined by comparing a desired ink color correction amount with an actual ink color correction amount, and wherein the actual ink color correction amount is obtained by comparing the ink color value difference at time (t) with the ink color value difference at time (t+1).