Re: counts per inch, my $0.02

Bill Martin wrote:

> From: Bill Martin <wwm@...>
>
> What about them being "too" sensitive, as in picking up all the
> vibrations from the machine, the building, everything moving nearby?

I think it would be almost impossible to build an interferometer that
would work, with a 1 M or so measuring arm, on a machine tool
whole it was cutting. the vibration would be making fringes go zooming
all over the place, and the counters would go nuts trying to keep up.

But, as a calibration tool, and for testing leadscrews and making
up machine error compensation tables, it would be great!

Jon