关键词: 数控系统, 实时以太网, 逆向分析, 测试

Abstract: To reflect the machining precision of Computer Numerical Control (CNC) system controller,a CNC machining performance testing method based on reverse data analysis was proposed by analyzing CNC system structure based on industrial Ethernet,.With this method,the designed testing system consisted of a data listener and a monitoring PC based on FPGA.Data frames from industrial Ethernet were captured by data listener and was sent to PC with its arriving timestamp.With the designed listening method,no time delay was imported to the normal data transfer.The designed CNC machining performance analysis software running on PC extracted motion control data from the data frame in the application layer,and online reverse data analysis was then used to evaluate CNC machining performance.Data analysis method was illustrated by taking precision evaluation of circular interpolation as an example,and real-time extension KRTS was used to provide real-time environment for the procedure of data receiving and analyzing.The interpolation precision of a CNC system based on EtherCAT was tested with this method,and the result showed that CNC machining performance evaluation could be done easily and effectively with this method.

Key words: computer numerical control system, real-time ethernet, reverse data analysis, tests