If you like my designs consider buying me a beer, (donate) and following me

Feel free to join Tronxy group https://www.thingiverse.com/groups/tronxy-x1

Simple kit for transforming your 3d printer to a plotter. It uses 5.5mm diameter metal rod (you can get them as office supplies, they are used as a risers for plastic office paper trays) as a linear rail and 2 small rubber bands to ensure constant pressure even on uneven bed.

It screw in place of hotend and uses a ball point pen or any type of marker/sharpie, or in fact any type of tool with handle that can fit in its hole (a bit under 12 or 16 mm wide) to plot drawings onto your printbed or paper attached to it.