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Originally Posted by RogerR
at the peachtree regional, we found that our robot was unable to climb the small steps. luckily a coach from 494 helped us build some 'sliders' out of some extra material the martians had (delrin, i believe), using a sawz-all and a hand drill. the sliders (along with a pneumatic cylinder) allowed us to get up onto the 6-inch platform in one bound.
the sliders are the white triangular pieces affixed to the front of the bot.
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we used a 1/4" bolt as a cotter pin for our arms primary joint ("Its a quarter inch of hardened steel . . . it'll hold!").
We sheared that mug twice.
I think we broke every cotter pin in the arm at least once. It was nuts.
Haha, best ghettofab, though.
So we used 4 wheel tank drive, two drill motors, right? Not enough power to skid with 4x 12" pneumatic skyway wheels. So we used two pneumatic wheels in back, two hard rubber in front, but the hard rubber tires were a lesser diameter, and stilll too sticky anyway. So we went ghetto omniwheel: we drilled .9" holes around the outside of the hard rubber tires and super-glued 1" marbles into them. It worked great. And it set us apart. Good stuff.