Re: clamping pressure
Chuck Grant (grant@aretha.llnl.gov)
Fri, 28 Jul 1995 18:19:51 -0700
> From: Steve Scampini <scampini@hp-mpg.an.hp.com>
>
> Hello Everyone,
> I have been trying to follow the thread about mounting geometries and
> mirror distortions. Let me share an impression (only an impression).
> It seems to me that the two factors should be considered. Not only
> the location of the mounting points on the back of the mirror but also
> the hold down hardware on the front edge. It also seems to me that
> the closer the back mounting points are to the center of the mirror, the
> greater any "bowing" effect on the mirror from clamping pressure from the
> front edge...sort of a lever arm effect. This would imply that you would
> have to be extra careful in not applying too much clamping force for
> mounting points closer to the center.
>
The correct amount of "clamping force" is zero. The front clips should
not even touch the mirror. They are there only for "emergencies," such
as leveling or inverting your tube. Of course you might have such an
"emergency" every time you transport your scope.
Chuck