Abstract: Serving to control at least two pulse-controlled drive means for moving a tool along respective coordinate axes, the control system comprises input means for presenting workpiece data and tool data; an arithmetic unit for processing said workpiece data and tool data presented by said input means and for providing section end point data which are related to said coordinate axes and define section end point positions of said tool on a path along which the tool is to be moved by said drive means; clock means operable to produce clock signals at a plurality of clock frequencies; and interpolating means arranged to receive said section end point data and clock signals and to deliver speed control pulses to each of said drive means to cause said drive means to move said tool between successive ones of said section end point positions along path sections having predetermined configurations.

Abstract: A machine tool and its associated control system has workpiece holding me which are mounted on a frame for rotation about a fixed axis and are adapted to support and to be fixedly connected to a workpiece, such as a crankshaft, centered on that axis. The machine tool further has a tool carriage which is slidably mounted on the frame for displacement in a direction which is transverse to the rotational axis; first drive means which serve to impart angular rotation to the workpiece holding means about the axis; second drive means which serve to displace the tool carriage in the transverse direction; and electronic control means for controlling the first and second drive means so that the desired angular rotation and transverse displacement are performed with a predetermined, generally nonlinear relationship to each other.