[ATM] Re: Second Thoughts on Mirror Support

[jonah at eecs.berkeley.edu (Jeff Anderson-Lee)]

Perhaps.  4.32e-3 mm is 1.7e-4 inches or 0.17 thousands of an inch.  I 
don't have a dial indiactor that can measure to that accuracy.

Obviously if the compression CAN be measured by a such dial indicator 
then we are OK, since the bending of the backplate would be less than 
required tolerance due to the compression of the RTV pads due to a 0.306 
kb load..  On the other hand, if the compression is not measurable (with 
a dial indicator) there is still room for uncertainty.

Also, there is a some room for play.  If we make the pads thicker (e.g. 
4mm) and narrower (e.g. 18mm) we can improve the elasticity of the pad 
at the cost of a change in (a) the max loading and (b) the shear 
performance.

Jeff

Jean-Guy Moreau wrote:

> 
>  
>
>>Does anyone know how compute how much compression a 25mm round by 3mm 
>>thick RTV pad would experience under a 0.306kg load?
>>    
>>
>
>
>Hello Jeff, it can be measured with a simple dial indicator
>and a test plate no?
>
>Jean-Guy
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