| 摘要 |
A numerical control apparatus includes a program analyzing unit 19 that extracts a command rotational speed of a rotary shaft from a machining program, an optimum rotational speed recording unit 16 that stores a plurality of optimum rotational speeds that are suitable to suppress chattering vibrations, and a command rotational speed substitutability determination unit 17. The command rotational speed substitutability determination unit obtains a substitute rotational speed range that represents a range of a substitutable optimum rotational speed based on the command rotational speed extracted from the machining program, and selects an optimum rotational speed from among the plurality of optimum rotational speeds stored in the optimum rotational speed recording unit, which falls within the substitute rotational speed range, as a command rotational speed to be actually used in processing. |
