grbl is stepper motor controller firmware for three ... analysed in this further EinW blog My small cnc mill project needs motors (so I am told) that are too powerful for the normal drivers included ...

On the electronic side, he replaced the controller that came with the kit with an STM32F469 discovery board and an Arduino CNC shield. He has a G-code controller from a previous project, ...

In that case, it can be mesmerizing like this Arduino-driven kinetic sand table ... A pair of stepper motors connected to a CNC shield do all of the work, driving around a stack of magnets ...