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Unread 14-03-2011, 08:02
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
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Re: Banebots RS-775 Case Short

Guys,
What you are describing is a perfect example of motor current running through the Crio chassis. Beside the 775 case short, you likely have a sneak path somewhere else on the robot that ties the Crio chassis to frame. When a motor drives in one direction it may be driving the current through the Crio chassis, elevating the +24 volt common rail. This can cause various Crio issues up to and including reboots. Since the sensors are/should be tied to +24 volt rail, they also experience the same power supply issues. Using 24 volt solenoids should also show up some unusual problems in the pneumatics circuits as well.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.