Simple Drawing Bot

After letting the second mixture of graphite, clay flour, charcoal, and water dry, it was attached to the end of a 12V motor. In the first attempt (first video) a lower-end 9 volt battery was used which didn't provide enough power to overcome the friction of the drawing surface. In the second test (second video) a higher quality 9 volt battery was used which allowed the device to move on its own. The graphite form dried hard enough to not crumble completely away, though some smal piece did break off. The next step is to test different forms/shapes/moulds of graphite and observe the way the act on the surface.

Here is the first video:
Here is the second:
This image is of the outcome of both tests.