An online monitoring, diagnosis and control system based on virtual instrument for CNC spindle

In the field of precision machining, the spindle is the “heart component” of the machining center. The dynamic performance of the spindle will directly affect the performance of the machine and the machining accuracy of the products. In order to avoid the above problems, an online monitoring, diagnosis and control system based on virtual instrument is designed for spindle. The system can monitor the operation condition of CNC electric spindle in real-time. Some classic signal processing and analysis methods are adopted such as time domain waveform, envelope spectrum and spectral kurtosis etc. The system is developed by LabVIEW language and on 107Z data acquisition system. The experiment platform for the system is a horizontal machining center of Dongyu CMV-1100A. The program is effective after preliminary test verification.