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Unread 25-03-2011, 13:22
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Travis Hoffman Travis Hoffman is offline
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FRC #0048 (Delphi E.L.I.T.E.)
Team Role: Engineer
 
Join Date: Sep 2001
Rookie Year: 2001
Location: Warren, Ohio USA
Posts: 4,047
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Re: cRio Constantly Rebooting

Quote:
Originally Posted by Jared341 View Post
Interesting - I was watching the Waterloo Regional feed, watching 2056 score twice in autonomous (very impressive!) before dying shortly thereafter for about 40 seconds. I wonder if this was the same issue?
I'm sure I'll be asking Tyler Holtzman to find out.

Quote:

As an update:
* We received our tool crate from Florida, and began doing diagnostics on our electrical board. We have been unable to find any debris, loose connections, damage, etc., to which we could attribute the problem.

* We did notice that with our practice robot up on blocks (wheels off the ground), slamming the stick from full forward to full reverse did cause a (predictable) brief but severe drop in battery voltage. Other than simply asking too much from our battery, though, we're almost out of theories.

* This still begs the question: why didn't we see the issue in practice? Or on practice day or the first half of Friday of our first Regional?

* Lastly, we looked at video of each and every time we died on the field. I see no real pattern - sometimes we were lightly bumped, sometimes we were turning in open field, sometimes we were picking up or carrying a tube. I was able to tell that our RSL DID go out completely each time, meaning that it was the cRIO (and NOT the radio) that was doing the rebooting.
3 robots. 3 events. 3 fields (well, 2 - I believe the Pittsburgh field was sent to Waterloo...). Exact same symptoms.

Hmmm.........
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Travis Hoffman, Enginerd, FRC Team 48 Delphi E.L.I.T.E.
Encouraging Learning in Technology and Engineering - www.delphielite.com
NEOFRA - Northeast Ohio FIRST Robotics Alliance - www.neofra.com
NEOFRA / Delphi E.L.I.T.E. FLL Regional Partner
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