Machine tool with function to automatically modify cutting conditions

A machine tool for machining a workpiece according to a machining program, the machine tool configured to

• receive data including
• upper limits and lower limits for cutting conditions including a cutting width, a cutting depth, and a cutting load of a tool used for machining, and
• a range of the machining program and a modification condition of the machining program for modifying at least one of the cutting width and the cutting depth of the tool,
• store the received data in a memory of the machine tool,
• automatically modify, based on the modification condition, the at least one of the cutting width and the cutting depth of the tool in the machining program, and
• calculate a cutting load imposed upon cutting, based on the modified at least one of the cutting width and the cutting depth,
• wherein the machine tool includes a controller configured to
• determine whether or not (i) the modified cutting width or cutting depth and (ii) the calculated cutting load fall within ranges between the received upper limits and the received lower limits of the cutting width, cutting depth and cutting load, respectively, and
• in response to a determination result that (i) the modified cutting width or cutting depth and (ii) the calculated cutting load fall within the ranges between the received upper limits and the received lower limits of the cutting width, cutting depth and cutting load, respectively,
• without modifying the machining program, create a modified version of the machining program that reflects the modified at least one of the cutting width and the cutting depth in accordance with the range of the machining program stored in the memory, and
• execute an actual operation according to the created modified version of the machining program.