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View Poll Results: Mecanum or 6WD
Mecanum 90 40.36%
6WD 133 59.64%
Voters: 223. You may not vote on this poll

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Unread 09-01-2011, 16:02
James Tonthat James Tonthat is offline
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Re: Mecanum or 6WD

6WD - higher traction, less weight, simplicity, comes in the KoP!

Turning radius - of a properly designed 6WD should be zero, it should turn around the center point of the robot the weight should be relatively centered on the robot.

Yes - after seeing 2007

Edit:

Simplicity because of less gearboxes, another plus is less weight because of that same reason.

Quote:
Originally Posted by Ryan_Davis View Post
I think Mecanum seeing as it brought success for us last year, the turn radius can't be that good for 6WD not to mention the extra power expended in turning those two extra wheels. Then again Mecanum requires four motors. I predict we will see robots shatter. I liked that at the kickoff.
Turning radius - see above

Extra power - this is a misnomer. The same amount of power would be going to the ground, in fact in mecanum, there is wasted power because the force vectors work to cancel another wheel's. A 6WD should also require 4 CIMs.
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Last edited by James Tonthat : 09-01-2011 at 16:06. Reason: Reply to above post
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Unread 09-01-2011, 16:11
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Re: Mecanum or 6WD

Quote:
Originally Posted by James Tonthat View Post
in fact in mecanum, there is wasted power because the force vectors work to cancel another wheel's
This does not waste any power.

The only wasted power in a mecanum is due to the friction in the bearings in the rollers.


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Unread 09-01-2011, 16:13
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Re: Mecanum or 6WD

Quote:
Originally Posted by Ether View Post
This does not waste any power.

The only wasted power in a mecanum is due to the friction in the bearings in the rollers.

I think he means in the sense that part of the force "cancels out" as it's applied in a direction the robot is not travelling in.
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Unread 12-01-2011, 01:43
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Re: Mecanum or 6WD

Quote:
Originally Posted by Ether View Post
The only wasted power in a mecanum is due to the friction in the bearings in the rollers.
Even with a frictionless roller, you're wasting power by squeezing or stretching carpet in the sideways direction while trying to move forward or back. You could perhaps argue that this isn't being wasted "in a mecanum", but it's definitely happening because of features inherent in a mecanum wheel.
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