LEGO Mindstorms robot catching ball

This is a LEGO Mindstorms delta robot built to catch a ball. It uses two NXTcams in a stereo configuration to estimate the trajectory of the ball and attempt to catch it. It works on about 1/5 good throws, it can reach an area with a radius of ~25 LEGO studs. The robot is programmed using ev3dev: . For a more detailed description of how this works, see