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Originally Posted by M. Krass
By varying the diameter of the effective wheel on one side or another, you can vary the speed at which it travels a given distance. Make the wheels on the left larger than those on the right and your robot will turn right, for example.  |
oohhhhh i see.... well thats kinda akward tho. no more skidsteer...
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Originally Posted by ken
one of the benefits of a variable transmission like this: it can be in the high rpm part of the drivetrain, right on the motor for example
where the energy is hi rpm and low torque, so you would not need as much friction between the two surfaces, and the parts could be fairly small.
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hmm.. true. but well for the sake of this thread, lets not talk about those cvts. lets just talk about variable diameter wheels. <nice title btw.
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Quote:
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Originally Posted by Veselin Kolev
thrust bearings on the hemi-wheel.
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Dang, you just had to ruin it for us with that one little line! You are 100% correct though. I had totally forgotten about the thrust load issue. Nuts.
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you mean balls?
[/quote]Like you said, it can be done, but now it doesn't seem as easy or fun anymore.[/quote]
well i saw a robot that had omniwheels on an extreme angle. people are doing it already. just not on a swivel...
and as for not changing robot height, then the center (of the sphere) of the face of the hemisphere must be within the angling axis. so dpendin on how bulky that wheel+gearbox+motor tilting assembly is, it may not be that practical.
but other than load issues for the cylinder or w/e angles the assembly, why not let the robot height vary? it might come useful. high off the ground for high speed movement so you cant get snagged on each carpet crease. and low down to push. and its kinda easy to lift the robot on a bar again if the game calls for it now too. retractable...