DIY inexpensive 3 axis CNC conversion of a mill

Professor Rieg is at it again! (@ Institute of Engineering design & CAD of Uni Bayreuth)
converting a mill to 3 axis CNC with inexpensive steppers & software:

"A conventional milling machine Wabeco F1200 - but it should work with any brand -
is upgraded into a 3 axis CNC mill using stepper motors and an inexpensive Estlcam control based on an Atmel 328P "Arduino" microcontroller.
Programming is done directly using G code, thus neither a CAD program nor a CAM program is necessary." (35 min video)

https://www.youtube.com/watch?v=-uER7c5hIqs

Caution: Unprotected welding on the mill might concern some sensitive viewers!

Ever try Linux CNC? It's pretty powerful (and free).

LinuxCNC