The motors are mounted at the top corners of the blackboard, and move the pen holder ... plotter using readily available parts that can reliably plot large graphics on a piece of A1 paper.

Sure, we see quite a few plotters and other motion machines ... You might ask; if you have a 3D printer, why you wouldn’t just mount a pen on it and call it a day? Well, you could do that ...

A type of pen plotter that wraps the paper around a drum with a pin feed attachment. The drum turns to produce one direction of the plot, and the pens move to provide the other. The plotter was ...