PSN-L Email List Message

Subject: Re: Question regarding leveling of vertical seismometer
From: ChrisAtUpw@.......
Date: Thu, 3 Apr 2008 14:19:23 EDT


In a message dated 2008/04/03, charles.r.patton@........ writes:

> The only other trick is to put enough weight on the base 
> so that the center-of-mass is within the triangle formed by the fixed 
> point and two screws (or use a long, triangular shaped base where all 
> the parts are within the triangle. 

Hi Charles,
       
       This is not usually done. The base is always flexible to some extent 
and having an offset centre of mass / anisotropic flexure may not be exactly 
helpful. 

       Regards,

       Chris Chapman   
In a me=
ssage dated 2008/04/03, charles.r.patton@........ writes:

The only other trick is to put=20= enough weight on the base
so that the center-of-mass is within the triangle formed by the fixed
point and two screws (or use a long, triangular shaped base where all
the parts are within the triangle.


Hi Charles,
      
       This is not usually done. The base is a= lways flexible to some extent and having an offset centre of mass / anisotro= pic flexure may not be exactly helpful.

       Regards,

       Chris Chapman

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