Design And Implementation Of CNC System Communication Platform Based On Real-time Network

Computer Numerical Control (CNC) Technology as the key technology of the advanced manufacturing technology, is developing towards opening, network and intelligentization. With the trends of network-based CNC system as the point, this thesis researches and implements the real-time network CNC system communication platform, which for network-based is established.Firstly, the thesis introduces the development trends of CNC system and the functions and features of network CNC system, and analyes the architecture of CNC system.Then it proposes the communication platform of CNC system which is based on real-time network, and divides it into internal and external network.Internal network uses high-speed fieldbus MECHATROLINK. According to the characteristics of MECHATROLINK, the thesis designs and implements a device driver layer between motion controller and filebus.External network uses hard real-time Ethernet RTnet which is a complete software-based framework. Based on the detailed analysis of the real-time network protocol stack, the thesis designs and implements a real-time device driver of RTnet. Based on this, using real-time network protocol stack of RTnet as the real-time network infrastructure, the thesis implements the RCS communication platform based on RTnet and establishes a network communication agency in CNC system. At last, this thesis tests and analyses the real-time performance of external network.This real-time network communication platform of the CNC system which accomplishes the real-time communication among the remote monitor, CNC system and field device, can provide a communication guarantee to remote network-based manufacture and monitor, which for enterprise network-based manufacture and automatic production is favorable established.