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Originally Posted by Tom Ore
Another potential problem with staffing is if your frame isn't square - ie, loads on the wheels have too much difference. We had that problem this year - we shimmed one gearbox and the staffing was fine after that.
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So I was thinking along the same lines as Ether as well,
Quote:
Problem is, the rollers can appear to be free-spinning when not under load, and then bind up when they are loaded.
There is a lot of axial force on the roller under real-world operating conditions. It is prohibitively expensive to put high-quality thrust ball bearings on FRC mecanum wheel rollers. I've never seen the VEX mecanum wheels. What provision is in the design to react the high axial forces without creating excessive friction? IOW, what two materials are scrubbing against each other when the roller is axially loaded?
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But we have a 28"x28" robot with a center of mass right in the middle... So my thought was maybe the wheels just aren't as smooth, but apparently other are having good luck with them.