Design and Implementation of Open CNC System Based on Fieldbus
Based on the research about traditional CNC system architecture and by analyzing the features of Fieldbus and the requirement about open CNC system,this paper proposed a new design method about open CNC system architecture based on Fieldbus technology.By investigating the problems in traditional CNC system architecture,this paper introduced the MECHATROLINKⅡ Fieldbus.The design method in this research separated the interpolate calculation in traditional CNC system architecture,coarse interpolate was calculated by up-level motion controller,accurate interpolate was calculated by down-level Filedbus driver by setting up thread scheduled function,and corresponding memory buffer and ring buffer were adopted for data exchange.This paper expatiated the design and implementation of the open CNC system based on the MECHATROLINK II Fieldbus,discussed the system performance influence such as control precision and resource consumption etc by taking up this new architecture.And the effect of this new system was verified by a comparative experiment and a complicated machining workpiece.