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Unread 12-01-2014, 11:58
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Jeffy Jeffy is offline
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AKA: Jeff Gier
FRC #2410 (Metal Mustang Robotics) #159 (Alpine Robotics)
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Join Date: Mar 2008
Rookie Year: 2008
Location: Fort Collins
Posts: 523
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Re: 2014 Ball Compression

Quote:
Originally Posted by Cash4587 View Post
This is a thread for teams to post their results for how much their ball compresses. I would like to know about how much it is compressing for most teams. Thanks!
With a 3d object, it is not as easy as "this is how much you should compress the ball" like it was with frisbees.

What matters, is how much you change the internal pressure on the ball.
So, A single wheel can compress the ball to a smaller diameter than a long roller because it has less contact area.

All that being said:
Our prototypes ranged from 2 to 8 inches. But you are best off making a prototype, or designing something that can adjust the compression easily.

OR, look into using gas shocks. The rule of thumb is to compress with 3-4 times the weight of the ball. A quick search for should clear up any confusion. (I particularly like 1902's 2008 bot)
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Metal Mustang Robotics 2410 (2008-2011)
2008 STL Rookie All-Star
2010 GKC Finalists
2010 OKC Champions
Alpine Robotics 159 (2012-)
2012 CO Finalists

700 miles from home, 2 miles from FRC. Life is good.
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