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-   -   Our prototype drive chasis(only weighs 27lbs!) (http://www.chiefdelphi.com/forums/showthread.php?t=121856)

Ether 06-12-2013 19:42

Re: Our prototype drive chasis(only weighs 27lbs!)
 
Quote:

Originally Posted by RyanCahoon (Post 1309331)
Do mecanums correspondingly have sqrt(2) more torque than an omni setup with the same mechanical advantage? Or are mecanums that much less efficient?

Read the statement in blue italic at the bottom of the pink section in the chart linked in post 11 in this thread (but see note1 below).

Quote:

If it's just a matter of mecanums essentially having more mechanical advantage, then this doesn't answer the question of one being more agile...
Correct, but my post was not addressing the "agile" comment.

Quote:

...as the same characteristics could be got by changing the gear ratio of one or the other.
Theoretically yes (see note1 below). See this document.

note1: The affordable mecs and omnis used by most FRC teams tend to have significant parasitic losses (mainly roller friction and roller axial free play) that affect real-world behavior noticeably (especially on a compliant surface such as carpet). This is especially noticeable for mecs in the strafe direction.


RyanCahoon 06-12-2013 23:55

Re: Our prototype drive chasis(only weighs 27lbs!)
 
Quote:

Originally Posted by Ether (Post 1309356)
Read the statement in blue italic at the bottom of the pink section in the chart linked.

Ah nevermind the chart didn't load completely for me. Some things the phone isn't good for.

Thanks for the clarification


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