Servo motors are used to impose a particular motion on the mechanism model. Servo motors behave like motors, by forcing a specific type of motion to occur between two bodies in a single degree of freedom. You can add a servo motor to a joint axis or a geometric entity, such as part planes, datum planes, and points. You use servo motors to impose a particular motion on a mechanism. Servo motors cause a specific type of motion to occur between two bodies in a single degree of freedom. You add serv