This is an experiment on the closed loop DC servomotor control system (SMC). It will able to be used for practical use with/without some modifications. The closed loop servo mechanism requires real-time servo operations, such as position control, velocity control and torque control. It will be suitable for implementation to any embedded 32 bit RISC processors as a middleware. In this project, these operations are processed with only a cheap 8 bit microcontroller.Recently, most servo systems are using brushless motors called "AC servo motor" to reduce maintanance cost. The AC servo motor with PM rotor is a kind of the DC motor, difference between AC servo and DC servo is only motor driver. Any other block includes theory on the servo control is same as DC servo system.……