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Re: What motors do you use to drive your robot?
Since our team has had success with the Bosch drill motors we keep using them year after year. We keep the transmission on them (with the pins removed) so we can have low and high range shifted by a small pneumatic cylinder. Our drive train has one mounted on each side and connected to the wheels with 35 chain. The motors are mounted opposite each other and one is connected to a jack shaft before the spocket to the chain so it will run the same direction of the other motor. This solves the problem of the robot "drifting" to one side when driving. They do get hot if they're driven long (like in a parade) but they don't get a chance to heat up during a normal 2 minute competition match.
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2006 Maryland Delphi "Driving Tomorrow's Technology" award
2006 Connecticut General Motor's Industrial Design award
2005 Finalists-----------New Jersey (along with our alliances again, 56 & 303)
2005 WINNERS of the Radio Shack Innovation in Control Award (not once, but twice!  )
2004 WINNERS ------ Johnson & Johnson Mid-Atlantic Regional (also thanks to our alliances 56 & 303)
2004 General Motors Industrial Design Award Winners
2004 Archimedes Quarterfinalists (also thanks to our alliances 121 & 386)
NEMO _________ NonEngineering Mentor Organization
"Make it idiot proof and someone will make a better idiot!" - author unknown
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One of my early mentors gave me wise words -- when designing a system to compile & analyze information, your first design choice should always include consideration of a stack of 3x5 file cards. - Jaxom [more] 
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