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Unread 06-05-2010, 21:41
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AKA: Patrick Freivald
FRC #1551 (The Grapes of Wrath)
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Join Date: Jan 2007
Rookie Year: 2001
Location: Naples, NY
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Re: Attempting the impossible

Quote:
Originally Posted by sdcantrell56 View Post
Properly set up, you should never break a chain.
We used chain on our mecanum system because we were afraid what the humps would do to direct-drive transmissions this year and wanted to displace some of that abuse through chain, and we also chained the mecanum wheels to raised traction wheels for hump-transversal assist...

We had no problems at FLR, but at Championship managed to shear -- that's right, I said shear -- four master links. On four separate chains.

We think it was due to abuse on the Andymark pylons -- they were only aluminum, after all, and small deformations can pop things out of alignment. But shearing masterlinks, that was pretty impressive. We're not *sure* why, and the consistency of it happening on four separate chains is particularly confusing, but we're blaming aluminum abuse for now. (Perhaps a summer diagnostic project is in order.)

A few years ago we went direct-drive off of AM 12:1 planetaries, and it held up very well in a very abusive competition. We'll consider it again, I can assure you.
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Patrick Freivald -- Mentor
Team 1551
"The Grapes of Wrath"
Bausch & Lomb, PTC Corporation, and Naples High School

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Last edited by pfreivald : 07-05-2010 at 08:22.
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