Numerical control system

Abstract

According to the present invention, a numerical control device 3 moves a plurality of machine elements of a machine tool 2 along a plurality of control axes on the basis of a moving pulse and performs an interference check calculation between two machine elements forming a prescribed set to be checked. The numerical control device 3 comprises: an orientation dependence information storage unit 53 which stores orientation dependence information that depends on shape and orientation and does not depend on the position of each of the two machine elements forming the set to be checked; an interference check unit 36 which performs an interference check calculation on the basis of pieces of position information and the pieces of the orientation dependence information about the machine elements; and an orientation dependence information update unit 52 which acquires pieces of shape information and pieces of orientation information about the machine elements, and updates the pieces of orientation dependence information on the basis of the pieces of shape information and the pieces of orientation information, wherein the orientation dependence information update unit 52 does not update the pieces of orientation dependence information, when the pieces of orientation information do not change.

Dependencies are inferred from the claim text.