Numerical control method and numerical control device

A numerical control system for 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:

• first setting means for setting two shafts whose moving directions do not intersect orthogonally with each other, and setting any one shaft of two shafts as an oblique reference shaft;
• oblique angle setting means for setting information based on an angle between two shafts whose moving directions do not intersect orthogonally with each other;
• and
• coordinate system selecting means for selecting any one of 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, both being set by the first setting means and the oblique angle setting means.

A numerical control system for 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 first setting part for setting two shafts whose moving directions do not intersect orthogonally with each other, and setting any one shaft of two shafts as an oblique reference shaft;
• an oblique angle setting part for setting information based on an angle between two shafts whose moving directions do not intersect orthogonally with each other;
• and
• a coordinate system selecting part for selecting any one of 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, both being set by the first setting part and the oblique angle setting part.