Quote:
Originally Posted by Chris is me
While these are helpful videos, in the case of the first video I'm not satisfied with a "test" consisting of someone rolling the wheel along the ground with their hands. They are in complete control of the wheel and could easily induce more axial loading than is present on a robot, etc. It's more likely than not that an on-robot test would yield the same results, I'm sure, but I just wanted to point that out.
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I totally agree with you (although maybe not calling the test a "test"

). I don't have access to this stuff currently, but I'm actually surprised someone hasn't done the sharpie marking with a closeup of a robot moving.
Anyone with a good mec drivetrain, sharpie, and smartphone/gopro out there??????
Quote:
Originally Posted by Chris is me
I wonder how much of the second video discrepancy is caused by the brief moments in the rotation of the mecanum wheel where the traction wheel loses contact. I'm sure not a lot, but it's something to consider.
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yes, it would be better if the axle of both wheels were actually attached via some structural members, and the traction wheel width was as wide as necessary.
Anyone with some bored underutilized students, a spare mec wheel and extra wide traction wheel of the same radius out there??