Patent ID: 6909939
Filing Date: 2005-06-21
Classification: G05B

Abstract:
1. A numerical control method of controlling a machine tool having at least two feed shafts, moving directions of which do not intersect orthogonally with each other, by issuing commands on a program orthogonal coordinate system, comprising: a step of setting two shafts whose moving directions do not intersect orthogonally with each other, setting any one shaft of two shafts as an oblique reference shaft, setting information based on an angle between two shafts whose moving directions do not intersect orthogonally with each other, and setting a first program orthogonal coordinate system constructed such that a moving direction of the oblique reference shaft coincides with a command axis direction of the program orthogonal coordinate system and a second program orthogonal coordinate system constructed such that a moving direction of another shaft other than the oblique reference shaft coincides with a command axis direction of the program orthogonal coordinate system; and a step of selecting any one of the first program orthogonal coordinate system and the second program orthogonal coordinate system.