Automatic strip gage control system. “ASC” specialists have finished the works on implementing the automatic strip gage control system on the reversing cold rolling mill “Quarto 400”. The automatic strip gage control system operates on basis of signals from two contact strip thickness gages of “UVB Technik” manufacture (Czech Republic) and with the use of programmable controller Simatic S7-1500. The system brings into action the magnetic amplifier, which, in its turn, controls the mill screws’ drive, executed according to “voltage-control” principle. Due to implementation of the automatic strip gage control system it is possible now to roll the strip within the required thickness tolerances almost without any manual intervention.