This computer controlled AC position servo system can be used for investigation of open and closed loop position control using digital techniques. A typical system consists of a PC, an I/O card, a geared induction motor with a position encoder and inertia disc, a power trigger module, a power supply unit and munber of tests and control programs. Digital controller such as PID type, optimal state, and Fuzzy logic,etc. can easily be implemented on this system. Provided flexible software minimizes the need for external test equipment. Introductory manual provides information about the system model and how to use the system for training purposes.