Numerical control device and numerical control system

A numerical control system comprising:

• a numerical control device that controls operation of a machine tool and generates a movement command for moving a control point of a robot;
• and
• a robot controller that is communicable with the numerical control device and controls operation of the robot based on a movement command transmitted from the numerical control device,
• wherein the numerical control device includes:
• a first movement command generator that calculates a target movement trajectory, which is a target of a movement trajectory of the control point, and generates a first movement command including the target movement trajectory based on the numerical control program;
• a second movement command generator that generates a second movement command which does not include the target movement trajectory based on the numerical control program;
• a selector that selects, as a movement command generation subject, either one of the first movement command generator or the second movement command generator;
• and
• a transmitter that transmits a movement command generated by the movement command generation subject to the robot controller, and
• wherein the robot controller controls operation of the robot based on the second movement command when receiving the second movement command, and controls operation of the robot to move the control point along the target movement trajectory when receiving the first movement command.