Faber-Castell Pen Adapter for HP 7440A Plotter

This is a pen adapter for the HP 7440A pen plotter sold in the mid 80s. This adapter will let you use Faber-Castell Pitt Artist pens with the Hewlett-Packard device. They are meant to be used with a small set screw to secure the pen in place.

This design works flawlessly with the plotter's carousel as long as the transparent top portion of the carousel has been cut off.

This design was created specifically for one of my project called Yöti, the algorithmic portrait artist (https://djip.co/