Numerical control device with manual machine processing function, which allows automatic switching of the machine processing direction

摘要

A movement instruction unit of a numerical control apparatus that controls a machine tool that machines a workpiece outputs a pulse signal for interpolation according to a manual operation. When a pulse signal for interpolation from the movement instruction unit is not output within a predetermined period of time, a direction of relative movement of the tool with respect to the workpiece automatically becomes unidirectional from a direction in which the tool moves relative to the workpiece along a designated shape switched over, in which the tool moves relative to the workpiece along a normal line of the designated shape, or from the direction in which moves the tool relative to the workpiece along the normal line of the designated shape, in the direction in which the Moves tool relative to the workpiece along the designated form.