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Unread 28-04-2003, 09:01
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,811
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Re: Who used wheel encoders

Wildstang Team #111 used wheel encoders. Very simple solution, a simple cut wheel insert made of aluminum and backed with black paper became the encoder. Used two optical sensors, since they were unlimited under the parts list. Resolution, less than 2 inches, if the wheel stayed on the ground. Two sensors give both tach and direction, when phased 90 degrees apart. Used for auto mode and with accumulated errors during a 15 sec auto mode, we were consistently accurate to within +/- 6 inches anywhere on the field. Our experience was gained from Lego League and testing. We will use this again if the game warrants it.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
 


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