Quote:
Originally Posted by Kevin Sevcik
Lacking the fabrication support necessary for the above, 57 has settled on the kit frame with a chassis of 1"x1"x1/16" wall square aluminum tube, mostly held together with more 1/16" sheet plates riveted with 3/16" aluminum structural rivets. It's pretty lightweight, plenty strong if you're not dropping your robot off a cliff, and we can get 20' sticks of the stuff for $6 from a local supplier, even on a Saturday. Which is harder to say about AM channel or 80/20 or another T-slot extruded aluminum.
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Interesting... We use 1/8" wall square tube on a kitbot frame, and every year it seems like we bend or break at least one piece of it tubing -- making us leery of going any thinner. (Also, there's no such thing as a "local supplier" in Naples, NY... Unless you need a cow, STAT.)
The few people who don't ever make mistakes are the same people who simply don't do anything. What people do after they make a mistake tells others what they are made of. - Andy Baker [more] 
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