Robots are made of three main components: the controller, mechanical parts and sensors. The type of materials that make up the different components will vary depending on the type of robot. These components can be metal or plastic, but usually robots are made of metal.
In a robot, the controller is also known as the "brain" of the machine. A computer program runs the controller which, in turn, controls the robot and its actions. It is an extremely detailed program, since it has to cover all aspects such as movements and reactions.
The mechanical parts of a robot make up its body. They all work together to help the robot turn, move and grab and lift things. Some of the different mechanical parts found in a robot include grippers, gears, wheels, motors and pistons. Usually, some type of electricity makes the robot move. It can also, however, be moved by air or water.
In order for a robot to learn about its surroundings, it needs sensors. They help a robot determine relationships such as the space between objects, as well as different sizes and shapes. For robots that grasp objects, sensors allow them to know the amount of pressure to use to prevent the object from being crushed.