Pen holder designed to be mounted in one of the spare extruder mounts on the RepRapPro Mendel.

Can be used to hold a pen for general purpose plotting or in my case PCB plotting.

Requires:
4 x M3 20mm machine screws
4 x M3 hex nuts
6 x M3 flat washers

1. Load into OpenSCAD.
2. Customise pen_dia variable for pen diameter.
3. Print
4. Mount on printer and enjoy.

or

If using a pen with a 9.5mm diameter such as the Staedtler Lumocolor 318-9 that I'm using simply print STL.