The Genmitsu 4040 Pro and other CNC machines that can use a 65-69 mm spindle collar will be able to utilize this design to hold a pen for plotting or drawing. This pen will have a vertical deflection of approximately 5 mm while still maintaining constant pressure on a platting surface.
Note: This project was carried out in house, including the milling of the bearings. This project description makes no accommodation for substitution of parts or size of non-printed parts.

This design is derived from the concepts set forth in thingiverse thing:5347939. I printed this device because I found the use of magnetic forces intriguing, It however as presented was missing practical features I desired in application to my CNC router.