Basic components used in robotics system with their functions: 1. Arm: The arm is the part of the robot that positions the end effectors and sensors to do their pre-programmed task. 2. End-effectors: It is designed to perform the task like grasping, transporting, lifting etc. It also be used to perform operations on work piece. 3. Actuator: An actuator is a device that produces translatory or rotary movement of the links or makes the freedom possible. These are the drives for the manipulator, which connects the controller with manipulator. 4. Sensors: They convert one form of energy into another for useful purpose. They perform two major tasks. One is to collect information about the different links, arms with their status and other one is to inform controller about outside environment. 5. Controller: Controller coordinates the movement of the arm. The controller receives the input data from the computer, controls the actuator motion and takes the feedback information through various sensors. 6. Drive: The drive is the engine or motor that moves the links into their designated positions.