Numerical controller

A numerical controller comprising:

• a servo motor controller for controlling a servo motor of a machine tool;
• a memory device;
• a display;
• and
• a processor configured to:
• receive an input of a machining program including a cycle command for controlling the machine tool, the cycle command including a plurality of arguments,
• create a plurality of tool paths for maneuvering the machine tool based on the machining program,
• control the display to display the machining program including the plurality of arguments and the plurality of tool paths depicting a simulated operation of the tool in response to the machining program, each of the displayed plurality of arguments are individually selectable by a user selection on the display,
• record a relation between the plurality of arguments of the cycle command and the plurality of tool paths in an information table stored in the memory device,
• in response to receiving the user selection of an argument of the plurality of arguments of the cycle command displayed on the display:
• specify all tool paths corresponding to the selected argument with reference to the information table, and
• control the display to display the specified tool paths among the plurality of tool paths in a different form from a form of another tool path, and
• in response to a user selection to execute the machine program, controlling the servo motor controller to maneuver the machine tool along the tool paths.