EVENT-BASED TEMPERATURE CONTROL FOR MACHINING USING MTCONNECT

MTconnect is a newly- developed standardized communications protocol that is designed to make it easier to collect, transmit and leverage data from shop floor machine tools. However, MTConnect is a read-only architecture, i.e., it is currently used for monitoring and not control of manufacturing processes. This paper develops an event-based real-time control architecture using MTConnect and demonstrates feasibility on tool-tip temperature control of a small-scale CNC prototype machine. Analytical modeling provides a link between tool feed rate and tool-tip temperature. This model, which is verified through experiments, is used to develop both periodic sampling and event-based PID control laws. The periodic PID controller is implemented on device to serve as a performance benchmark. Its performance is compared, both in simulation and experimentally, to an MTConnect-enabled event-based controller operating over the web.