There would be no need for a DRO and EMC to display from the same source. I 
have a CNC mill and use the CNC display as a DRO when manually milling. I also
will use the MDI to move to a spot then use the handwheel to drill a hole if 
there is 
but one to drill.

John


On 1 Feb 2008 at 16:34, [EMAIL PROTECTED] wrote:

> I have a different idea.
> 
> Why not tap in to the signal from the encoders themselves? If this is
> glass scales with proper quadrature output it should be simple to read
> this signals by a cheap card? There is nothing that says the
> quadrature signals can't be read by both EMC and the DRO main unit. 
> 
> I plan to do this myself. I also bought a far eastern DRO with glass
> scales and hope to be able to tap in to the signals being transmitted
> by the scales. I have a Universal Stepper Card with quadrature inputs.
> At the same time it is quite nice to have the DRO for manual milling.
> 
> Does anyone have a good reason for not doing this? I should possibly
> use optoisolators though, right?
> 
> Anders 



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