Numerical control machine tool

A numerical control machine tool including a holding means that holds a workpiece, a barrier setting means that sets a barrier with respect to the holding means, a machining means that machines the workpiece, a movement means that moves the machining means, a control means that controls movement of the movement means in accordance with a machining program through which the workpiece is machined, and an interference checking means that stops the movement of the movement means when it is determined that the machining means enters the barrier for the holding means, the machine tool comprising:

• a manipulation means through which a barrier canceling command for canceling the barrier set with respect to the holding means is input;
• and
• a writing means, wherein, when the movement of the movement means is stopped due to determination by the interference checking means that interference occurs, the writing means writes the barrier canceling command in the machining program where the interference checking means determines that interference occurs based on manipulation of the manipulation means, in order to cancel the interference check executed by the interference checking means,
• wherein, when the machining program in which the barrier canceling command is written is carried out, the interference checking means omits the interference check for the portion in which the barrier canceling command has been written.