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Unread 19-09-2003, 09:10
Chris Hibner's Avatar Unsung FIRST Hero
Chris Hibner Chris Hibner is offline
Eschewing Obfuscation Since 1990
AKA: Lars Kamen's Roadie
FRC #0051 (Wings of Fire (on sabbatical))
Team Role: Engineer
 
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Re: thanks!

Quote:
Originally posted by Mercutio
wow! thanks for all the feedback -- i can't believe you all responded so quickly!

i noticed a lot of people are saying that four-wheel drive is the way to go. how do you do it? we tried four-wheel in FIRST last year, and it was a *disaster*! we couldn't turn at all until we covered the rear wheels with slippery plastic to decrease traction, and even then turning nearly burned out the drill motors. in the end, the only way to get decent manuverability was to run each wheel off a seperate motor. what did we do wrong?

p.s. what does "high centered" mean? i'm afraid i've never heard that term before

again, thanks for all your help!

It is not uncommon for teams to try 4-wheel drive and not be able to turn. I've been working on a 4-wheel drive white paper that shows the calculations you need to make to ensure that your drivetrain will turn. I think it will be done this weekend, so I should be able to post it Monday morning.

"High centered" means that your robot is stuck on something (typically in the center of the robot). The term comes from 4x4 off-roading. Think of it this way: you're driving your Jeep through the woods and you attempt to drive over a large log that is across the path. You get halfway over the log, and your Jeep is now resting with its frame on the log, and your wheels can't get traction. This is because you have something high in the center of your vehicle - hence, your vehicle is "high-centered".

-Chris
 


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