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Unread 21-02-2010, 02:23
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: Weirdest issue with our robot!

Justin,
The jumper is needed for the Crio to monitor battery voltage. When the voltage falls to about 5.5 volts, the Crio disables PWM outputs. This is done in anticipation of the voltage falling to 4.5 volts at which point the 24 volt power supply becomes unstable. It is possible to draw the battery down when you have multiple CIM motors in stall.
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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.