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[Ether]

Originally Posted by Dodge it Ram it

Thank u but that does really tell me how long the rollers are and how much the plate twists and such

The roller axis should be 45 degrees from the plane of the wheel.

If you want a "bump-free" mecanum wheel, the contour of the rollers is important. Design help for the roller profile can be found here: http://www.chiefdelphi.com/media/papers/2390

Also the rollers should be long enough so that there is a slight overlap as one roller transitions to the next as the wheel is turning.