by dsharlet » Sun Feb 22, 2015 5:31 pmThis is a delta robot that uses stereo NXTcams to track and catch a ball thrown through the air. Stereo calibration with NXTcams was not easy, but eventually I got good enough calibration to make this work (some of the time) The delta robot has a reachable area with a radius of ~25 studs. it can catch the ball around 1/5 of the time for good throws, i.e. throws in reach of the arm and lofty enough to give it time to estimate the trajectory and move to the intercept.I was not sure this project would be possible when starting work on it. I am amazed that the EV3 has enough computational power to solve the problems I'm asking it to do, and quickly enough to react in time to catch the ball. I even run the stereo calibration on board the robot! This project uses ev3dev: http://www.ev3dev.org. I had to build custom NXTcam support code. It would be great if mindsensors shipped support for ev3dev!