The Time Print Machine by designer Paul Ferragut uses standard felt-tip pens mounted to a device controlled by custom hardware using openFrameworks to draw pointilist representations of images. The marker stays in contact with the paper for a time period relative to the brightness of the pixel it’s attempting to draw, thus the “bleed” of the marker creates larger spots for darker pixels and smaller ones for lighter. Ferragut further modified the machine to create successive 4-pass CMYK drawings as well. This certainly isn’t the quickest method of drawing something with a robot, but it’s pretty darn neat. See some more detailed photos of the drawings and the machine here, and also check out his gesture drawing device. Thanks Paul for sharing your work with Colossal!