Simultaneous measurement of 5DOF spindle error motions in CNC machine tools

Abstract

We present a method for the simultaneous measurement of 5 degree-of-freedom (DOF) spindle error motions in computer numerical control (CNC) machine tools and develop a measurement system. The measurement system uses polarization-maintaining fiber coupled with a dual-frequency laser as the light source. The axial error motion of the spindle is measured by heterodyne interferometry, and other 4DOF error motions are obtained by collimation measurement. Based on the measurement system, a comprehensive measurement model of spindle error motion was established. The influence of system error on the measurement accuracy of the spindle tilt error motion and radial error motion was analyzed. According to the measurement model, a corresponding data-processing method is proposed, which removes some systematic errors. A series of experiments was conducted to verify the feasibility and effectiveness of the proposed measurement system and the corresponding measurement model.

Research on Fault Diagnosis Method of CNC Machine Tools Based on Integrated MPA Optimised Random Forests

“…With the development of big data technology and artificial intelligence technology, intelligent CNC machine tool fault diagnosis technology has become an inevitable trend [6]. Intelligent CNC machine tool fault diagnosis method can not only early detection and troubleshooting to improve the reliability of machine tool operation and work efficiency, but also in advance of the station short maintenance to extend the applicable life of the machine tool to ensure the normal production of the production line [7]. Therefore, the study of intelligent CNC machine tool fault diagnosis method is the current precise production line intelligent demand [8].…”