Re: [CAD_CAM_EDM_DRO] Re: Dan Mauch DRO board help

Ken Jenkins wrote:

> I'm interested in corresponding with anyone out there who has
> built and is using Dan Mauch's DRO board. I'm interested in
> what encoders you're using (I can't find any linear scales
> that will produce a high enough resolution). I'm probably
> going to go with a U S. Digital rotary encoder and use a wire
> loop to convert linear,

What sort of resolution do you want? Most of the linear encoders
made since 1980 are basically metric, and the readout box converts
to inches (if you want it). So, the basic resolution is usually .01 mm
(25 cycles/mm with full quadrature counting).

There are higher resolution scales, but they get very expensive
very quickly. There are also interpolator boxes that increase the
apparent resolution of analog scales.

Jon