Quote:
Originally Posted by Ari423
Are those speeds about what they should be?
Is 1/8 plate too thin? too thick?
Will the 1.0625" d pneumatic cylinder be strong enough? too strong?
Will the thing snap in half as soon as we start driving?
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They seem a bit faster than average, but certainly reasonable.
Definitely not too thick, assuming that's aluminum.
A 1" diameter cylinder has an area of 0.78 square inches. At 60 psi, this would generate over 45 pounds of lift, which sounds about right to authoritatively lift a 140 pound robot.
I would round off the corners of those triangular holes. Not only will it be easier to machine, this will dissipate stress. Sharp inside corners are the most likely places for metal fatigue stress fractures to begin.
I would also add some springs to lift the mecanum wheel off the floor when not in use to reduce drag and wear; they just need to be strong enough to lift the mecanum wheel, sprocket, bracket and chain. You should be able to anchor them to the top of the translucent bracket in the render by adding a couple of holes on either side of the cylinder.