NUMERICAL CONTROL METHOD AND DEVICE THEREFOR

摘要

A numerical control device capable of optimally controlling a machine having a parallel link mechanism, and a special configuration in which the control axis feeding direction is changed as other axes are moved, so that no orthogonal system is obtained by using a working program of the orthogonal coordinate system. A memory (110) contains Mechanism parameters (180) including the hinge axis definition for determining the configuration of the hinge axis of the link mechanism, the link mechanism dimension definition for defining the positional relationship of each connection point of the hinge axis, and the hinge axial length offset quantity for defining the dimension of the hinge axis at the origin establishing position. The program coordinate command given by the orthogonal system is analyzed by an analyzing unit (121) and interpolation data in each axial direction of the orthogonal coordinate system is generated by an interpolation unit (122), after which interpolation data in each axial direction of the orthogonal coordinate system is converted into numerical control data of the hinge axial direction of the link mechanism according to the mechanism parameters (180) by a machine component axis data conversion unit (160).