Alt-BEAM Archive
Message #02367
To: John Leo Zimmer jlz@novia.net, beam@corp.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Thu, 15 Apr 1999 02:15:34 -0600
Subject: [alt-beam] Re: OTU apps
At 11:55 AM 15/04/99 , John Leo Zimmer wrote:
>At 23:26 14 04 99 -0600, Dave Hrynkiw wrote:
>>... Too ba[d] about the gears
>>having to be exposed, tho. That's what kills them the most - debris
>>contamination.
>
>Good point, but why should they HAVE to be left exposed?
>I've experimented with a couple of units which I left in the aluminum
>housing, except for cutting off the small end to get access to the rotor
>plates and their shaft. A simple plastic fitting supports the pager motor,
>and reseals the gear train.
I suppose that'll work if you want nothing but the full 3600:1 reduction.
But to tune the geartrain, I've had to peel it right out and shift the
gears up on the shafts to get rid of the endplay.
>Other light weight solutions are possible... large diameter shrink wrap
>comes to mind, alluminum foil even.
The shrinkwrap is a good idea, except that it sucks into the gearhousing a
bit and rubs on the gears.
>Lubrication is another issue that would be better served by rewrapping the
>finished assembly in a housing.
Yes, absolutely correct. I guess we just need custom-machined OTU housings
in the future.. (grin!)
Regards,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
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