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Originally Posted by shamuwong
Another robot that deserves mention is 308. They were an awesome robot at GLR, though I didn't get to see them in-depth. Their robot was made almost entirely of plastic. When I first saw it, it was so clean looking that it looked like a commercial robot, and watching the whole revolver-hopper mechanism and pneumatic catapult (i think) shooter was like a plastic robotic ballet. If you happen to be at the same regional as them, I would definitely reccomend checking that robot out.
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308's robot is probably the most unique robot of the competition this year. Since I work at TRW in Farmington Hills (308's sponsor) and used to be a mentor on that team, I have all of the inside scoop on the design.
The entire hopper/feeder/shooter mechanism is completely mechanically coordinated and timed, much like a watch. It is all driven off of one motor that continuously spins. It drives a Geneva Mechanism that indexes the sorter, then winds the rubber band of the lost-motion catapault. Once the band is wound, the arm flings the ball and the whole thing starts again. They can shoot about 2 balls per second this way. They have a really nice video of it shooting 10 balls in about 5 seconds during the build season. Maybe I can find a way to have them post it somewhere.