Abstract
Commercialization of printed electronics products requires uniform line width and thickness of the print pattern, which can be accomplished only by uniformization of the contact pressure in the roll-to-roll processs [1]. The conventional contact pressure control system has limitations in compensation, because the indirect measurement of the contact pressure performed by using the load cell generates time-delay error and magnitude error. In this study, a transfer function between the load cell signals and the actual contact pressure is derived to calculate the measurement time-delay, and the error was compensated by using a time-delay predictor. In addition, individual drive cross-coupled control system with time-delay compensator is designed in consideration of the effect that two servo motors have on the pressure on the other side of the impression roll to perform contact pressure uniformization.
Design of a Pressure Control System With Dead Band and Time Delay