I am sure etching is the way they are made.  The problem is it ain't easy to do.
I am going to give it a try here one of these days but I suspect my home brew
results will be less than desirable. Right now I am writing a postscript program
to print out the tool.

Jim Hannon





Doug Crice  on 10/20/99 01:17:01 PM

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Subject:  Re: Strong motion sensor design



I believe those springs are made by chemical etching, similar to the
process for making your own PC boards.  Probably the material is copper
berylium sheet spring stock.

Greg wrote:
>
> jmhannon@.................... wrote:
> > I sure wish there were an easy way to make the spiral flexures used in
> > geophones.
>

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