Method of controlling the continuous movement of stock being rolled in a rolling mill train

A method of controlling the continuous movement of stock to be rolled through a series of rolling mill stands, comprising

• driving the rolls of each of said stands by a hydraulic turbine,
• operating a variable displacement pump to apply hydraulic pressure to each of said turbines to operate the same at an infinitely variable speed,
• detecting any change of said hydraulic pressure applied to the turbine which drives a preceding one of said stands in response to the initial passing of said stock through the succeeding one of said stands, and
• adjusting the displacement of the variable displacement pump which operates the turbine which drives said succeeding stand to correct the speed of the turbine which drives said succeeding stand to compensate the change of the hydraulic pressure which has thus been detected.