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Unread 14-04-2011, 01:01
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Mark Sheridan Mark Sheridan is offline
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FRC #3476 (Code Orange)
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Re: Minibot climb rate

Quote:
Originally Posted by sumginazu View Post
Mark (or anyone else) - Other than increasing magnet strength, how can one reduce the wheel slip? I know there are obvious options like changing the tread material, but I'm wondering if any other techniques could also work.
This sounds like the best solution:


Quote:
Originally Posted by boomergeek View Post
We finished our last regional and did not implement our secret weapon:
(although we did tell the Boston Regional judges about it)
Rubber on rubber (1.2 CoF sliding friction) for the first 3 inches of vertical climb before switching to rubber to steel (0.3-0.6 CoF sliding friction).
We projected that would save us 0.2 to 0.3 seconds and still keep normal force low.

The rubber on rubber is minibot contact to a hostbot ramp that runs vertically parallel to the tower pole and then switches onto the pole before the minibot crosses the 18" line.
I like this idea a lot. It is unfortunate that you did not have time to implement it. I hope your team will be able to try it out at an off season competition.

Bill our calculations show that your minibot should climb in about 1.3 seconds. I think its a little off, I am going to tinker with it a bit. Its set up to have drive-train efficiency different at low rpm than high rpm. Just to be clear, this is a separate efficiency from motor efficiency.