Drawing devices + surface

Here are some more graphite/clay forms created by moulding and then hand-sanding dried forms.
This image shows the graphite forms attached to the 12V DC motors.
These images are of the shifting drawing surface w/attached device, which tilts using a powered car mirror mount.
The last image is of the drawing/markings create by the device on the tilting surface. Unfortunately a lack of support for the device + lack of voltage made it difficult for the motor to overcome the friction of the surface. This left the markings limited.