| Summary: | Improving the energy efficiency of machine tools is the goal of sustainable development of the mechanical manufacturing industry. The key is to measure or calculate energy efficiency conveniently and accurately. This article proposes a method of calculating power by reading the computer numerical control system’s servo parameters from its current-loop and speed-loop, establishing the relationships between cutting power, total power, and servo parameters, and using these relationships for power prediction. Experiments were done on a computer numerical control lathe. The result shows that this method has high precision, does not need additional sensors, and is independent of cutting process parameters, workpiece material, heat treatment state, and tools. This method may be used for developing a cutting power management module integrated in the computer numerical control system with real-time monitoring power consumption because the computer numerical control system can read servo parameters real time.
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