The meaning of this word deals with the motion of the ROBOT. In basic mechanics we will try to understand motors, gear mechanism and physical structure of a robot. Depending upon area of uses ROBOT size may differ from each other. It should have the proper equipment to complete or perform a task. Like we have hands, fingers and arm to hold a thing similarly our ROBOTs require. Our hand, fingers and arm move at a certain angle and in a certain direction which is known as degree of freedom. For movement, our body contains several joints likewise we provide joints in robots too. At joints we fix different types of motor for movement. These motors can be servo, DC geared and stepper.