grbl is stepper motor controller firmware for three-axis cnc machines ... turn into a software project, and 32bit grbl is a bit like that at the moment, whereas 8bit grbl 1.1 has been stable for more ...

And now, not only does OP deliver with a working CNC plotter, he also plans to develop it into a self-replicating machine ... for continuous rotation, an Arduino, and the aforementioned ...