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Unread 03-07-2010, 17:27
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Re: bump-free mecanum wheels

Quote:
Originally Posted by kamocat View Post
(Sorry about the large pictures. I'm assuming that no-one is doing CAD on a screen smaller than 1024x800)
Not all of us are doing CAD. Plus a 240x320 image will give us the same info - there's not a lot of detail in the images.

Anyway: A diagonal slice of a cylinder isn't what you want; as you found, it 'leaks out' of the wheel radius. That's because the large cylinder, when viewed at "the" angle, does not follow a circular profile; it is an oval.

What you need is an oval shape, which looks perfectly circular when turned to the angle of the roller wheels; then take your slice (does that make sense?).
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