DIY Axidraw. Built around a Pi Zero W and uses 3D printed components. Stick a pen in it and let it draw up whatever you wish! Use it to build your own Ordibooth!
See web link below for the full instructions and information.
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Most excellent. I’ve been working out the IK for my two-motor basic pen plotter, but this thing looks both readily buildable and super reliable. Can’t tell without downloading the STL, but what’s the largest part dimension on this? My printer only has ~15mm on a side.