Numerical controller

Abstract

A numerical controller for performing an machining operation by controlling relative position of a workpiece and a tool in synchronism with a rotational position of a rotational axis to which the workpiece or the tool is attached, without causing time delay of position control of the tool relative to the workpiece in varying a rotational velocity of the rotational axis. A rotational position θi(i=0, 1, . . . ) of a workpiece on the rotational axis, a position (Xi, Zi) of the tool relative to the workpiece when the workpiece is at the rotational position θi, and the rotational velocity Vi of the workpiece from the rotational position θi to the rotational position θi+1 are set in advance. Time Ti required for rotating the workpiece from the rotational position θi to the rotational position θi+1 at the rotational velocity Vi is obtained. Velocities Vxi and Vzi of the workpiece are obtained so that the position of the workpiece reaches the next set position (Xi+1, Zi+1) in the time Ti. Servomotors for the spindle, the X-axis and the Z-axis are driven at the set velocity or the calculated velocities to provide relative motions to the workpiece and the tool for the machining operation.

Dependencies are inferred from the claim text.