Information processing device

A numerical controller for simulating and controlling an operation of a tool based on a machining program, the device comprising:

• a processor configured to:
• store, in a memory device, at least information relating to a workpiece;
• carry out a simulation process of reproducing a positional relationship between the tool and the workpiece in a virtual space based on the information relating to the workpiece and the machining program;
• calculate, based on a result of the simulation process, an amount of removal of the workpiece by each block included in the machining program, the amount of removal being calculated on a per-block basis;
• and
• display, on a display device, each of the blocks included in the machining program in a machining program display field in a respective display mode, the respective display mode for each of the blocks is determined by comparing the amount of removal for each of the blocks to at least one threshold indicating a predetermined amount of removal,
• wherein the processor is further configured to identify, for each block included in the machining program, a block that acts as a factor causing the amount of removal of the workpiece within the block from the blocks of the machining program on the basis of the machining program and the result of the simulation process, and
• wherein when the machining program is displayed, the processor is further configured to display on the display device the block acting as the factor causing the amount of removal of the workpiece by the block included in the machining program in a display mode in which the block acting as the factor causing the amount of removal of the workpiece is allowed to be distinguished from other blocks.