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Originally Posted by greencactus3
marbles are glass right??? and a 130lbs robot slamming into a diamond plate 6in wall at (i dunno how fast you guys are, but say) 6ft/sec. is that marble still intact?
and how did you get those marbles to stay in the hole? apoxy?
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Yes, they are glass. And yes, perhaps they are breakable, but we have driven this thing on concrete at 8'/second with no breaks.
We realize it might be a problem, thats why we didn't glue them in (we haven't had ny fall out, either) so we can replace them easily.
we also drop the marbles alot, on concrete, with no problems.
Come to think of it, I've never ever seen a marble break. A sphere is a pretty strong shape.
BUt we might break one or two during competition. Thats what spares are for.