CNC Drawing Pen Holder

Made this floating drawing pen holder out of UHMW plastic and steel drill rod. I used the lathe to turn down 1/2" rod to 3/8" to fit a ER collet. A spring is used to hold the pen down for uneven surfaces. I also made a slightly larger UMHW holder for bigger diameter markers. Inspiration was from reading a post about a neat DIY Spirograph machine. Drawing done on my gantry router.