Go to Post In conclusion, we can say, with reasonable certainty, that we know nothing. - Max Lobovsky [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #17   Spotlight this post!  
Unread 01-02-2008, 10:58
JesseK's Avatar
JesseK JesseK is offline
Expert Flybot Crasher
FRC #1885 (ILITE)
Team Role: Mentor
 
Join Date: Mar 2007
Rookie Year: 2005
Location: Reston, VA
Posts: 3,716
JesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond reputeJesseK has a reputation beyond repute
Re: Serious Problem of Unknown Origin

Do not ever set your battery on concrete.

I don't understand the chemistry/physics behind it, nor do I ever intend to delve into the science of why it happens but something about rebarb, concrete and long half-life radiation drains your battery if it's in close proximity to concrete. I saw it happen repeatedly at the VA State Fair with our robot and rather than trying to understand why I'll just accept the fact that it happens for now.

What we saw was that the charger would say our battery was fully charged. We'd then transfer the battery to the robot and place it on the field. At the start of the match, the bot would move extremely slowly, and the OI would indicated ~7V on the battery. About 15 seconds into the match, the voltage would go UP and the robot would act normally. Who knows why ? What I do know is, we do not place batteries on concrete any more and we haven't seen the problem since.

If you thought your batteries were charged and then you get these results, perhaps this is why.
__________________

Drive Coach, 1885 (2007-present)
CAD Library Updated 5/1/16 - 2016 Curie/Carver Industrial Design Winner
GitHub
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Unknown Device ID(0) DavidGitz Control System 13 28-01-2008 20:28
SERIOUS COMPRESSOR PROBLEM simeon1770 Pneumatics 6 18-02-2007 21:07
FIRST Unknown irishninja General Forum 4 24-04-2006 08:45
serious problem found - robot controller resets when jarred! KenWittlief Electrical 23 19-03-2003 13:30


All times are GMT -5. The time now is 01:04.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi