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Originally Posted by phrontist
How would you change the size of the sphere? If it were somehow inflateable, it seems too easy to pop. I can't see any other expansion method being robust enough to work consistently.
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Looking at lbridgwater's robot it may be possible to place a blower inside that central pole and have the pole open on one end and drill venting holes below where you place the blower, such that when the blower was run it would pull air into the pole and exhaust it out into the robot thru the venting holes. Now all you have to do is figure out how to wire that motor. Not to sure if that could easily be done but thats an idea.