Vex robotics 406 4323 motorised robotic arm by hexbug vex 406 4323 p how do industrial robots the kind that are used on assembly lines actually work p p now you can unlock the secrets of these sophisticated machines by building one of your own the vex reg robotics motorised robotic arm is a completely functional construction kit inspired by real industrial robot arms it is operated by four battery powered motors and can pick up and relocate items using four degrees of freedom and a