Abstract
This paper describes a low sensitive position control system driven by a two phase servo motor. The system is designed and constructed practically. The responses of the system are simulated on basis of the approximated torque-speed characteristics of the motor. Furthermore, the position control system with a proportional controller is also constructed. The responses of both systems are measured and compared. As a result, it is experimentally confirmed that the low sensitive position control system has low sensitivity for the load inertia of about thirty five times as large as that of motor itself.