Numerical control apparatus

A numerical control apparatus comprising:

• a memory configured to store computer-executable units;
• a processor configured to execute the stored units, the units comprising:
• a program analyzing unit configured to pre-fetch, from a machining program, a first command for commanding a tool replacing operation, a second command for commanding only positioning of an axis included in a machine tool, the second command following the first command, and a third command for causing a first axis related to the tool replacing operation to be moved to a tool replacement position, the third command being described before the first command, and output the first command, the second command, and the third command;
• a tool-replacement-command output unit configured to cause, on the basis of the first command output by the program analyzing unit, the machine tool to execute the tool replacing operation;
• and
• an axis control unit configured to start, when the second command output by the program analyzing unit is a command for positioning the first axis, control of the first axis based on the second command, after waiting for the completion of the tool replacement operation based on the first command, and start, when the second command output by the program analyzing unit is a command for positioning the second axis unrelated to the tool replacing operation, control of the second axis based on the second command before the tool replacing operation based on the first command is started after the first axis has reached a predetermined position halfway in movement based on the third command.