ST has released a new evaluation board for a stepper motor driver. It’ll plug right into your 3D printer, and if you’re looking for a chip to build a cheap 3D printer controller board a… ...

Multifunction printers, for example, often use a three-phase BLDC-motor driver or a stepper-motor driver (either one channel or two channel) for the paper mover.

Perfect for a 3D printer, laser cutter, CNC, or anything else you can think of that needs to move in a few dimensions. But such a simplistic description of the 3+Pi might be underselling it a bit.