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Unread 16-12-2010, 11:10
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: Warming up the batteries

Quote:
Originally Posted by thelittlesister View Post
Our battery will drop from 12-13 volts to 9-8 in 1 minute of just being plugged in no matter what the temperature is.
-Ally
316
Ally,
You have left a lot open to question. Does the battery drop with the robot turned on but not moving? It is normal for a battery to read 8-9 volts under load (while the robot is moving) after a minute of operation particularly if you are running the compressor and using a lot of air. When you stop moving and the compressor turns off, does the battery come back to 11-12 volts on your dashboard? Again this is normal.

If the battery draws down to 8-9 volts with nothing else running and stays there or gets worse, then you have a short or bad component on the robot. Start by pulling all the breakers and then putting them back in one at a time to determine which device is drawing the battery down.
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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.