PSN-L Email List Message

Subject: Re: Spring Damping.
From: ChrisAtUpw@.......
Date: Mon, 23 Jul 2007 15:42:42 EDT


In a message dated 2007/07/23, Paulc@........ writes:

> I just finished up a  vertical  sensor with an AS-1 like suspension.
> After looking at the AS-1 pictures, and reading about it, I cannot see any 
> information about the damping of the suspension spring.

Hi Paul,

       You don't try to damp the spring itself, but you do damp the arm. For 
suggestions see http://jclahr.com/science/psn/chapman/as1%20damping/index.html
       It can be an advantage to mount the damping blade close to the mass. 
This system is very flexible. You just slide the magnet fixture further over 
the damping blade until you get the correct damping. I have tried 1/16" Al sheet 
for the blade glued to SS threaded rod with two part acrylic glue. It works 
OK, but it is not so effective. 

       Regards,

       Chris Chapman   
In a me=
ssage dated 2007/07/23, Paulc@........ writes:

I just finished up a  ver= tical  sensor with an AS-1 like suspension.
After looking at the AS-1 pictures, and reading about it, I cannot see any=20= information about the damping of the suspension spring.


Hi Paul,

       You don't try to damp the spring itself= , but you do damp the arm. For suggestions see http://jclahr.com/science/psn= /chapman/as1%20damping/index.html
       It can be an advantage to mount the dam= ping blade close to the mass. This system is very flexible. You just slide t= he magnet fixture further over the damping blade until you get the correct d= amping. I have tried 1/16" Al sheet for the blade glued to SS threaded rod w= ith two part acrylic glue. It works OK, but it is not so effective.

       Regards,

       Chris Chapman

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