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Unread 23-06-2002, 22:33
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#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,214
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balancing both goals on the bridge

Posted by CArobot at 1/16/2001 6:06 PM EST


Other on team #619, CArobot, from Charlottesville Albemarle.


In Reply to: Re: Problem with balancing balls on the goal on its side
Posted by Khalid on 1/14/2001 9:01 PM EST:



If the tower is on its side one of the PVC pipes will be up. ex. (.'.) This is because at the top the PVC joints extend beyond the flats created by the PVC and the bottom is supported by the flat of the plywood base.

If the tower is on its side on the bridge it will not be supported on either end but rather will rest on the flat created by any two of the parallel PVC pipes. This will result in a top surface that can support a big ball. ex. ( . . ) The two parrallel pipes that create this will be just under 12'' on center. Because what is initially the bottom end of the tower (now on one side) weighs so much more than the top of the tower it will need to be all the way to one side to keep it from falling off. Having it turned this way would meen eight inches of overhang on the end with the plywood and casters (the bottom) and two feet four inches overhang on the other side (the open end). This may necessitate having the other tower turned in the opposite direction to offset the weight. One nice benefit is that the parrallel pipes provide a fairly easy surface to put the big balls on and it will even bow a little which will make the balls tend to be more stable. The joints and the plywood also make perfect stops to keep the ball from rolling off the end and the fence that runs through the middle of the arena will keep the tower from going beyond the halfway point of the bridge. After the other tower has been placed on the bridge and thus balanced the tower will need to be pushed back so that the judges don't construe it as being supported by the fence in the middle, which would almost certianly result in point deductions.

Please respond with your ideas regarding this, as it is crucial to our robot's design.


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