This is an interesting use for an old plotter. It is able to hold a pen, a scribe, even an LED light for making drawings using a camera and a long exposure time.

We converted a plotting machine into an output device, that can draw, scratch or cut with almost any traditional drawing technique, in order to achieve aesthetics looking neither drawn by hand nor produced with only a computer. Most interesting and inspiring are all the little mistakes this machine produces, because of too much data, too much water, color, pressure etc.

The plotting machine – [via] Link