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Originally Posted by Chak
Wow! When I heard someone at kickoff say that a low-bar high-goal shooter is impossible, I knew someone else would do it.  |
Credit goes to John on this; he was adamant about the low bar.
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Does the drivetrain get over any other defenses, or is this bot focused on the low bar to shooting path? If the drivetrain has the ability to get over other defenses, I would be interested in knowing the wheels' size and the center wheel's drop.
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Can't get over what you didn't build.
We built Rough Terrain because we felt that was one of the toughest ones to get over. Others were planned, but time constraints pinched us (Monday was the start of classes at USC). The wheels are 8" AndyMark pneumatic tires, and the kit frame's drop is...1/8"? 1/4"? I don't remember, but it's the OEM AndyMark frame there.
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Looks like the intake is spring-loaded or something. Does that improve performance compared to a static wheel?
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It's actuated by a pneumatic cylinder, though that piece of surgical tubing you see replaces that original function (pushing the ball up the ramp) for most applications. We can pull it back in for frame perimeter and to eject into the low goal. It definitely doesn't hurt our low bar abilities to have it sitting lower than usual.
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I can't figure out how that catapult works; the catapult doesn't seem to be connected to anything but its shaft. Is the potential energy stored somewhere else, then transmitted to that shaft?
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Never underestimate the power of a CIM motor lightly geared.
It's literally one CIM, a Toughbox (maybe 12.75:1?), and the kicker you see on camera. Oh, and some pool noodle to protect everything. Drive it one way to pull it back, then swing it hard the other way to fire. I have experience with CIM-powered swinging sticks; it's why 1618's 2007 robot was called Uppercut. (There, it was a 5' PVC arm and it about sent me to the canvas.) We were happy with the kick, so why mess with success?