I am working on an art project focused on portraits. Instead of having the 3d printer print the model I would either like to replace the extruder with charcoal or a graphite pencil to draw the information coming from the computer file or hook one of those items to the source as it moves through its program for printing (without the actual 3d model being built).

The final images would be line drawings moving back and forth over and over in a finite space flattening the image and information coming from the printer rather than building it. From what I have learned asking people with various companies is that the system won't work without the filament coming from the source, but I have seen various hacks on youtube where people are able to do other things, but haven't seen this.

Thoughts?

Help! Thanks!