1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

How does a robot arm work? Robot arms are mechanical devices that have joints that can bend and rotate. They are driven by computer-controlled electric motors. Tools can be fitted to the 'hand' end of the arms, and the computer programmed to make them perform different tasks, such as cutting, drilling, welding, and painting. They are also used for dangerous tasks such as handling radioactive materials or unexploded bombs. Robot arms work quickly and accurately without human help.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Machines