This weekend, I added the ability to my drawing robot to understand gcode, the file format that is most commonly used for #CNC machines, #lasercutter and #3dprinting. Here is an image that was prepared for a laser cutter. Also it is the first #plot that did not use a thick Edding marker but a fineliner, and I must say I am impressed by the precision of my bot that currently has a drawing surface of 3.5m by 2m (and a max surface of 7m x 7m).
@olivier I like the plotter idea. I would add a revolver magazine with colored pens. And giving a fan a second life is cool.