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Unread 04-12-2013, 17:07
Richard Wallace's Avatar
Richard Wallace Richard Wallace is offline
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,670
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Re: New AndyMark Wheels

Quote:
Originally Posted by geomapguy View Post
Seem pretty durable?

Did you get hex or 8mm??
Sorry for being slow to get back here -- kinda busy in the lab today.

I got two wheels with hex bore. Rigged up a VexPro hex test shaft on some bearings resting in v-blocks, and an indicator to measure face runout near the outer edge of the black plastic. TIR was about 0.015 inch and I think some of that was caused by sloppy internal clearances in the bearings. These wheels appear to run pretty true.

I have not made a traction test set-up yet. Materials appear very similar to those used in other AM wheels that have been included in FRC kits for last several years, so I anticipate similar CoF. Interesting that the treads are crowned, rather than flat or dished as many other AM KoP wheels have been. This has me thinking they might be useful on the corners of a 6WD or 8WD set-up, with very little mid-wheel drop required.
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Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)

Last edited by Richard Wallace : 04-12-2013 at 17:10.