Digital media artists Makio&Floz use their AxiDraw drawing machine, which they have dubbed "Jojo le robot," to create plotted portraits. They are currently offering these signed and numbered "Plottraits" to the first 100 people who order.
About "Jojo," in the artists' words (translated from French):
Jojo, disciple of the greatest masters of his time, underwent a rigorous and intense training. He attaches an extreme importance to the quality of his line, but also to the quality of his material. As a result, the paper used has been specially selected for its grain and its particularity to put forward the work by offering a contrast between shadow and optimal light. Calibrated felts were also chosen for their finesse and the durability of the works.