Chief Delphi - H-wheel Question

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Technical Discussion (http://www.chiefdelphi.com/forums/forumdisplay.php?f=22)

- - H-wheel Question (http://www.chiefdelphi.com/forums/showthread.php?t=134230)

Ether

09-02-2015 12:52

Re: H-wheel Question

Quote:

Originally Posted by rlowe61 (Post 1440665)

Omni's do have drag, especially when at an angle not inlign with the rollers.

The rollers do not have bearings. The axial force on the rollers pushes them against the stops and creates a lot of friction. Same is true of the affordable mecanum wheels used in FRC. This is a major factor in the "non-idealized" behavior of omni and mec in FRC.

GeeTwo

09-02-2015 13:56

Re: H-wheel Question

Quote:

Originally Posted by Ether (Post 1440672)

The rollers do not have bearings.

AndyMark calls them bearings, but I agree that they are more properly bushings. The more traditional omnis with a lot of short cylindrical rollers have brass bushings at the ends of the rollers, and the new DuraOmnis with the long tapered rollers have nylon bushings. In both cases, these rotate on steel shafts.

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