Numerical control apparatus having memory storage for machine patterns,

Abstract

A computerized numerical controller for a grinding machine is provided with a memory device for storing a plurality of remachining operation programs and first and second data. Each of the operation programs in the memory device defines a grinding cycle pattern in which a tool support and a work table are to be moved for remachining one of previously finished portions of a workpiece rotatably carried on the work table. When the remachining of one portion of the workpiece is to be done for the purpose of correcting the dimension of the one portion, a manual data input device is manipulated to input the first data designating one of the remachining operation programs in addition to the second data indicative of feed amounts and rates through and at which the tool support and the work table are to be moved in accordance with one of the remachining operation programs designated by the first data. Upon completion of this data inputting, a manual pulse generator is manipulated to move a grinding wheel on the tool support to a start position from which the remachining operation is to be initiated. Then, a remachining start switch is depressed, in response to which the numerical controller controls movements of the tool support and the work table in accordance with the designated one of the remachining operation programs and the second data.