Abstract
Recent focus of manufacturing research has been in the development of unmanned machining systems. Modular Computer Numerical Control (CNC) units, which control and monitor many tightly coupled machining tasks, are required. This paper describes the detailed design and analysis of a modular, research CNC system for a milling machine. The feed drive servo of the milling machine consists of continuous and digital position control blocks. Continuous and discrete transfer functions of the complete system are derived and experimentally verified. A state space model of a feed drive servo is developed for a time domain analysis of actual position, velocity and armature current for given position input and machining force disturbances. A complete experimental verification of the system's model is presented.
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