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Unread 24-06-2002, 02:30
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#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
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Re: EVERYONE, ANSWER THIS PLEASE!!!

Posted by Patrick Dingle at 03/18/2001 9:26 PM EST


Coach on team #639, Red B^2, from Ithaca High School and Cornell University.


In Reply to: EVERYONE, ANSWER THIS PLEASE!!!
Posted by Rob DeCotiis on 03/18/2001 1:50 PM EST:



Our drive system was one of the things we were most proud of at New York city. Not once did we ever have any traction or torque problem. We didn't even need to groove the wheels. We were easily able to go over bridge, even when pushing another robot. The only problem we had was a lousy flexible coupler (plastic) that shattered during practice. We machined some aluminum replacement pieces that afternoon, and never had a problem again.

My main advice:
1) Use drill motors! They simply have the most power.
4) Power all four wheels! If you have unpowered wheels, you are wasting an amount of traction proportional to the force of the wheels on the ground. You may have noticed many of the robots with castors did not get over the ramp that easily.
2) Don't go for too much speed. Gear the drill motors down enough (use two sets of gears if necessary) so that the robot goes about 4-5 ft/sec. The speed vs torque needed generally changes with every game, but this game torque was very important.

Patrick

: what types of drive systems is everyone using??? im trying to figure out next year's bot so we can get working on it, then change it so it fits next year's specs... first thing's first - drive system!!!


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