| 摘要 |
PURPOSE:To compute a frequency function within an allowable error by approximating machining data, by which the non-roundness shape of a work is represented, by means of a frequency function, and effecting weighing based on an allowable error of radius during determination of each factor. CONSTITUTION:A data processing part 53 effects computing processing wherein machining data by which the non-roundness shape of a work is represented is approximated by means of a frequency function of a given order. In the processing, dot group data to represent the non-roundness shape of the work comprising a phase angle, radius, and a radius allowable error is inputted, and a frequency function of a given order to approximate dot group data is inputted. Consecutively, each factor of the frequency function is determined by a minimum square method, a factor is determined through weighing by means of a weight, based on an allowable error of radius at a phase angle, and a frequency function for which a factor is substituted is outputted. The frequency function is separated into high and low frequency components by means of a frequency separator 54, and the high frequency component is stored in a memory 43 for a command value for a piezoelectric actuator 15. The low frequency component is stored in a memory 46 for a command value for a VCM 31. |
