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Unread 01-03-2004, 08:20
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: 10,798
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Re: Voltage on Frame

Guys,
You may be missing the obvious. We have a new battery this year, the 7.2 volt backup. This battery is still up when all the fuses are removed and if the outer case were to be pressed up against a sharp edge it is possible to short the frame to one of the cells internal to the battery. This would give you a multiple of cell voltage when reading ground to the frame. On a discharged Nicad battery, 1.2 volt/cell x 3 cells = 3.6 volts less the discharge voltage might read close to 3 volts. Try disconnecting the backup battery and test again.
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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.