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.
