Re: [ATM] A strange Primary mirror cell in INTES MAK NEWT

[Dale Eason <atmpob@yahoo.com>]

The 6.25 inch cell was a pretty normal 3 point
support.  Sound like yours uses a flexing arrangement.
 See the archives for flexed mirror.

Dale

--- Max Mirot <maxmirot@charter.net> wrote:

> 
> I examined the primary mirror cell more closely. It
> is in a class of it's own. 
> 
> Only the edge is really supported.
> 
>  I has three 1/4" thick machined arcs around the
> edge each covering about 1/5 - 1/6 of the
> circumference.  
> These span the entire edge thickness of mirror with
> a small lip under the back of the mirror. 
> These arcs are tightly compressed against the mirror
> edge by a center tension bolt. You can't turn the
> mirror , it is under pressure. These arcs act like a
> vise with their inner surface in full contact with
> the mirror edge.  I wonder how this can work?
> 
> Dale did the Mak Newt you tested have this design? I
> did not describe it accurately before. 
> I noticed pinching last time out. How does one
> adjust the tension? 
> Torque wrench anyone.
> 
> Max
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