Re: [ATM] Use of bearings in (static) mirror cells

["David Harbour" <scarab2@cox.net>]

As always, I see deep understanding and a good idea from Bob.

I wanted to add a comment: I am a machinist, formally trained; a visit to my
web site will show you that it is ALWAYS POSSIBLE to defeat the machinist in
mounting and using bearings IN ANY APPLICATION.

Dave

http://www.atmsite.org/contrib/Harbour/Brngz.html


----- Original Message ----- 
From: "Bob May" <bobmay@nethere.com>
To: <atm@atmlist.net>
Sent: Tuesday, April 19, 2005 12:14 PM
Subject: Re: [ATM] Use of bearings in (static) mirror cells


> The problem with RTV flex joints is that they will allow the mirror to
move
> sideways and this causes a twist of the glass as one side is unloaded and
> the other side is double loaded.  A compliant hinge like Don Clement has
> done works as it allows for no real resistance in one direction.  I would
> think that better yet is the teflon cup for a steel ball which, while it
has
> a little sticion, we are discussing a very small force that is easily
> overcome as things move about.
> Bob May
> bobmay@nethere.com
> http://nav.to/bobmay
> http://bobmay.astronomy.net
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>


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