So he started to wonder if he could skip the controller entirely and connect the stepper motor directly to the digital pins of an Arduino. Generally speaking this is a bad idea, but if you’re ...

grbl is stepper motor controller firmware for three-axis cnc machines ... circuit for folk to add to typical commercial grbl boards With grbl, both limit switches for any axis are wired to the same ...

There are four poles to each of these coils, and they plug right into a standard stepper driver, so to control this board all you need is a basic Arduino and a motor shield. Or a RepRap board ...