Re: [ATM] Mirror Cells - Springs vs. Push/Pull

["Don Clement" <clement.focuser@verizon.net>]

>  Make a note of all the test
> parameters so that it can be repeated later.  Maybe attach the note to the
> scope near the bolts.

Donald,

Your scope is obviously flight or space qualified. I believe it should go
through much more rigorous testing before it's flight or launch. For the
typical  amateur scope that will not be need flight or space qualified, the
frequency of cycling on the compliant collimation bolts will be less than a
1000 cycles per night of observing.perhaps  more. But your flight-qualified
scope must endure much higher frequency  (KHz) and higher amplitude of
repetitive cycling.  I would suggest testing using a dynamic vibratory
testing over a long period to simulate your more demanding conditions that
might lead to early stress fatigue and complete failure. A system such as
this should work well.
http://www.lds-group.com/group118/Electrodynamic-Shaker-Systems You should
also shake and bake. Include a program of humidity changes, air pressure
changes and temperature changes while shaking. Then you can attach the note
with qualifications.

Don Clement
Running Springs, California


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