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Originally Posted by Ari423
I think the biggest problem you're going to run into trying to move that heavy load with mecanums is their low CoF...
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Mecanum doesn't automatically mean low friction. The rollers can be plenty grippy if you choose them to be. They get poor marks for pushing because the way the forces add up can cause them to slip at a lower combined forward torque than if the wheels were solid.
Just carrying a heavy load won't make a difference if the acceleration is low enough.
Quote:
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Servos I'd say are out of the question. There's no point in using a servo if you don't need to be able to set the angle it should be at (which you don't need to do for drive wheels).
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He said servo
motors. That's not what you're probably thinking of. Anyway, for a mecanum drivebase you
do want to precisely control the angle of the wheels' turning.
To address the original question -- figure out how much acceleration you need, and that will set a lower limit on the power you require from the motors. Then start looking at candidate motors and desired top travel speed to determine the likely gear ratios between motors and wheels.
If I were designing something like this, I'd probably lean toward servomotors, because they make the low-level software a lot simpler by handling the wheel position feedback automatically. Note that most people in this forum won't have experience with anything except DC Induction motors, so take that into account when assessing their advice.
As a programmer, I don't see a problem with using something like an Arduino to do the control. If your favorite programming language is solder, however, that might be an issue.