Patent ID: 6450097
Filing Date: 2002-09-17
Classification: B41F

Abstract:
A method of regulating inking of an ink film thickness when printing with a printing machine using a pre-existing mathematical model of the machine including an ink control loop and a model ink layer thickness, which comprises:determining an actual color value (xact) of an ink thickness with a color measuring device directed towards a printing copy; feeding the determined actual color value (xact) to a color control device; comparing the actual color value (xact) with a desired color value (xdes) and forming a comparison value (xactâˆ’xdes); forming an adjusted variable (y) from the comparison value by using the pre-existing mathematical model of the ink control loop; feeding the adjusted variable (y) to an ink setting element so that the setting element correctingly changes the inking; and performing the step of forming the adjusted variable (y) by including: calculating a steady state value (sstab) of the ink film thickness by additively superimposing preceding adjusted variable changes (&Dgr;yi); and calculating a new adjusted variable (YR) from the desired color value (xdes) , the determined actual color value (xact), and the steady state value (sstab).