SynopsisFundamental study on automatic gauge control (AGC) of reversing cold rolling mill was carried out. The study includes the method of evaluating performance of AGC system and designing a control system according to the results of the study.It was concluded that the response of AGC system depends on the dynamic characteristics of a reel motor current control in either case of controlling reel motor current or roll position. The AGC system controlling the reel motor current is better than the AGC system controlling the roll position even with a hydraulic screwdown system.A new AGC system controlling reel motor current and roll position has been developed based on the above results. This system has been applied to Sendzimir and 4-high reversing mills.
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