We think this is an intriguing take on half-tone art. It’s a CNC machine that uses an Arduino and two stepper motors to draw on a paper-covered drum. But you’re not just going to set it… ...

Ardunino based CNC plotter machine – made from two dvd drives! X and Y axis are using stepper motors and rails from two dvd drives and Z axis is using one micro servo.

On the other hand, a few years back we bought a brand new Opti BF20L (still a small but “serious” mill) with a manufacturer-supplied CNC conversion kit, and it came in at below 3000 Eur, new.