[teknopaul]

or names on birthday cakes. cutting guides on wood. UV paint on metal. Jokes on toilet roll :)

thinking there might be mileage in this idea. clearly a mod from a 3D printer design would be where to start. standardise ink delivery / modules for different materials with different characteristics. A standardised printer driver for Linux and other platforms would get a lot or re-us.

[NikolaeVarius]

Open source Pen Plotters/ Pick and Place machines all already exist and are common in the Maker world

[ryankrage77]

Attaching a ballpoint pen to a 3D printer/CNC machine/laser cutter seems like a good start. It would be low DPI and slow, but fine for drawing and larger text.