While I've never needed to have my CNC draw something, it is always nice to see creative uses/solutions for technology. Early in my teaching career we had pen plotters. Basically CNCs that moved the paper back and forth in one direction under the fixed gantry where the pen would move left and right to create architectural and furniture design drawings.
This Easy Mount Pen holder for my CNC Router( made from surplus parts in my garage) is made compatible to OFF supermarket BIC Atlantis ball point pens and the 12 COLOR Sharpie Ultra Fine (0.3mm) color Permanent markers - for low running cost.
Screws onto my CNC router Spindle holder block with just ONE Allen bolt by hand.
Paper is on top of an A2 cutting mat - which is also used for cutting vinyl using a home made CNC drag knife.
(I can't afford a 3D printer.)
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