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Unread 04-03-2012, 13:01
JABot67 JABot67 is offline
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AKA: John Bottenberg
FRC #2930 (Sonic Squirrels)
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Re: Your take on CAN...

Quote:
Originally Posted by techhelpbb View Post
We had a 6 wheel, dropped center tank drive last year. After a few competitions the center wheel actually wore down. When it wore down it was no longer lower than the rest of the tires (it was now 1/8" smaller in diameter). All of the sudden the robot was trying to force all 6 tires to drag across the carpet.

Instant overload. Consider that situation with your robot.
http://www.youtube.com/watch?v=Z4Id9IR_HCU

Consider this match video. It never seems like we are "beating on the battery". In fact, it looks like our driver is being very meek in this final match. Perhaps there was a problem from the very beginning, like a drive jaguar on both sides not working. However, our problem occurs around 1:20 in the video, when the right drive gives way.

We have omni wheels in the front of our robot that can be deployed for easier turning; they are deployed for the majority of the time except when we are pushing another robot, aiming to shoot, or trying to balance the bridge. When these omnis are deployed, only our back wheels are driven and we do not get a situation where a bunch of wheels are trying to drag across the carpet. Therefore, I believe that our drivetrain should not be demanding a ton from the Jaguars and the battery. Perhaps it is an electrical problem.

We will definitely work through this in the next couple weeks and find a solution. Thank you for helping us and pointing us in the correct direction. Nothin' like having a robot that almost works!
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John Bottenberg - University of Michigan '14 - Microsoft
FLL Team "Dark Matter": 2003-2005
Robofest Team "Dark Matter": 2005-2008
Team 67 Programmer: 2007-2010
Team 3322 Programming Mentor: 2012-2014
Team 2930 Engineering Mentor: 2015-????
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