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Unread 21-02-2010, 08:34
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ayeckley ayeckley is offline
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AKA: Alex Yeckley
FRC #2252 (Mavericks)
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Re: mecanum wheel defects? (help)

Quote:
Originally Posted by sanddrag View Post
For bolts, I'd recommend McMaster Carr
I can confirm that McMaster-Carr does carry the appropriate longer bolts. Sorry, don't have the P/N handy. We found that adding 5mm in length was enough to allow us to back off on the torque a little to the point that we've got non-binding rollers, without causing any interference issues due to the longer length. The picture on the A-M web site appears to show the wheels featuring the longer bolts as well; I guess they changed the design at some point.

Another issue we found is that some of ends of the rubber rollers weren't cut squarely, which in some cases caused tight spots in their rotation. Our fix was to square the roller ends up on a belt sander, being very careful not to affect the brass bushing.

Naturally, we'd ordered our wheels a day or two before A-M released the revised roller design, and we don't have the funds to purchase the upgrades.
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