Download the code to make a 2 axis digital readout to put on your old machine tools. This uses the Parallax propeller chip, along with a 2 line LCD display and two pushbuttons. Two quadrature encoders provide position data. The display shows x and y position, either axis can be zeroed. The scaling can be set for each axis.

The picture shows the hardware. I used the propeller demo board.
The Parallax proto board would be a good choice.

DRO.SPIN is the code for the propeller chip. It would be easy to add 2 more axes by going to a 4 line LCD.


download      DRO.SPIN

Parallax propeller  http://www.parallax.com/tabid/407/Default.aspx



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