Prototypes

I constructed two versions of the device; one made out of hardboard w/pendulum mechanism for rotation and another made with acrylic w/motor for rotation. The hardboard version was relatively unsuccessful, in that the material caused too much friction and flexibility. The pendulum motion could not overcome the friction caused by the drawing point. In the acrylic version the friction was greatly reduced + the motor allowed the device to overcome the friction caused by the drawing point. A problem common to both is that the ink drawing point dries too fast. I've tried removing the inner part of the pens; the inner part is wrapped inked soaked fabric. This fabric easily leaves marked on the acrylic (see the acrylic version). The lines are wide and need to be controlled. I'm going to look for a more suitable solution such as a calligraphy pen, etc.

This image is of the hardboard version of the device; the armature was moved by hand to stimulate the drawing process. Pendulum motion and track system was not successful in overcoming friction.
Detail image of hardboard track + gears.
This is the acrylic version; the armature was able to rotate around the surface with the aid of a DC motor. The parts reduce the friction making the track system functional.
Detail of the acrylic track + gears; the ink lines are wide.