Re: Newbie Questions

--- In CAD_CAM_EDM_DRO@y..., "quazga" <quazga@y...> wrote:

> Hi C.S.,
>

, I plan to

> do something along the lines of a laser from the head to the base
> rather than the popular head to the wall method. Problem with the
> later is I plan on building a stand with casters. I'm thinking of
> some kind of microscopic sensor of some kind. But haven't drawn

any
A couple of years ago, before being donated a full sized mill, I
posted a circuit on metalwebnews about how to build a head position
sensor with a dual element photoresistor and a laser pointer. It
proved to be accurate to about +- .002 of head deflection on a mill
drill. Contact me off list and I will try to dig up my old circuit
and some pix of the unit.