One nice feature is that he’s included a limit ... one servo motor is converted from 12 using an LM7805 voltage regulator. He’s also done a nice job packaging the Arduino, stepper motor ...

The build relies on a simple XY Cartesian design, using a pair of NEMA 17 stepper motors. It’s built in the typical CoreXY fashion, running GRBL firmware on an Arduino Uno. Where [TUENHIDIY ...

And rather than placing one stepper motor on each ... this is a single Arduino Nano connected to a pair of A4988 drivers, a MOSFET for driving the magnet, and two limit switches for homing.” ...