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Unread 17-02-2011, 15:41
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Re: Holonomic Drive System Issues, Robot Drives Diagonally...

Quote:
Originally Posted by omalleyj View Post
I think you need explain that more clearly. The robot will go at its maximum speed in the direction any pair is going in for the omni@45 arrangement. And .7071 of that speed in the regular front-back side-side directions. The ratio is 1.4, but you give the impression that it will go faster than its wheels are turning, which is impossible in any direction.
Omni vehicle with 45 degree-mounted wheels goes faster in the forward direction than omega*R (R being wheel radius and omega being wheel angular velocity in rad/sec).

A chart comparing omni, mecanum, and standard wheels can be found here.

A force analysis of mec vs omni can be found here. A kinematic analysis can be done using a similar approach.


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