What is the best software to run a cnc router 3 axis. I am hoping to use my Arduino and some stepper drivers. The only problem is, i dont want to have to write all of the gcode. Im looking for a program that will allow me to use a cad program, and convert the drawing to gcode which i can then copy and paste to my arduino.
There is a program called "grbl" that runs on Arduino hardware but it isn't an Arduino sketch so you have to use other AVR programming tools to build and upload it.
I have attached an un-tested version that I modified to compile as an Arduino sketch.
grbl.zip (56.3 KB)
Thank you Thank you very much , your a life saver.. now I can see some light ! 
Have you seen this
http://www.thebox.myzen.co.uk/Hardware/CNC_Conversion.html
All arduino code, no need to copy and paste gcode there is a processing program that feeds this into the CNC from a file.