A Method for Evaluating the Speed and Accuracy of CNC Machine Tools

Abstract

An important facet of the contouring performance of machine tools with computer numerical control (CNC) is the machining of workpieces within the desired accuracy and within as short a time as possible. However, conventionally, the accuracy (error) and the speed are evaluated separately. Therefore, in this research, a method is proposed to evaluate the speed and accuracy of CNC machine tools using two-dimensional representations of error and speed based on actual trajectories. Experiments have verified that it is possible to quantitatively evaluate the speed and accuracy of multiple CNC machine tools using two-dimensional graphs of maximum error and actual speed.