Patent ID: 8924172

Claim:
A power consumption display unit for a machine tool that machines a workpiece according to a machining program, comprising: machining state determining means for determining, when a main power switch used to supply power to the machine tool is ON, whether the machine tool is in a machining state where the machining program is executed to machine the workpiece or in a non-machining state where the machining program is not executed; power consumption measuring means for measuring a power consumption of the machine tool during a period where the machine tool is determined to be in the non-machining state by the machining state determining means; and display means for displaying the power consumption measured by the power consumption measuring means, wherein the machine tool includes: a first power-consuming element that consumes power in the machining state where the machining program is executed to machine the workpiece; a second power-consuming element that consumes, when the machine tool is in the non-machining state, in order to keep the machine tool in an operation standby mode where the machining program is ready to be executed upon issuance of a command to execute the machining program; and a third power-consuming element that consumes, when the machine tool is in the non-machining state, power independently of execution of the machining program, the machining state determining means determines, when the machine tool is in the non-machining state, whether the machine tool is in the operation standby mode where the first power-consuming element does not consume power and the second power-consuming element consumes power, or in an operation standby OFF mode where the first and second power-consuming elements do not consume power and the third power-consuming element consumes power, the power consumption measuring means measures at least one of a power consumption in the operation standby mode and a power consumption in the operation standby OFF mode, and the third power-consuming element includes at least the display means.