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Unread 15-03-2011, 12:31
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AKA: Chuck Brant
FRC #1583
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Join Date: Jan 2007
Rookie Year: 2006
Location: Centennial, Colorado
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Re: Rookie Team 3729's minibot

To get traction on the pole you have to have a normal force. The normal force comes from an interference fit. For example the pole OD is 1.75 inch. The distance between the rollers has to be something less than 1.75 inch. The less it is the more normal force. You have to experiment with what works for you. Another concern is the OD of the shaft. 1/2 inch could be too big. I know 3/8 inch and 1/4 inch work for about 3 lb minibots. 1/2 inch may stall the motors. Another way of saying this is your drive ratio needs to be tuned to your robot (it's weight).