Makelangelo 5 is the latest edition of the open source drawing robot that hangs on a whiteboard, window, or mirror to draw with a sharpie. Takes up no room on a table! Put one in your class and if a student is staring out the window, they're staring at the machine. Learn the basics of CNC without the burning hot danger nozzle, and upcycle the parts when you're ready to make a real 3D printer.
You can get a fully assembled and tested makelangelo or figure it out and make your own. It's open source!
Please share whatever you make on the marginally clever forums so we can get it to all the Makelangelo fans.
Makelangelo has been slowly evolving for nearly a decade. When I designed these parts I used Fusion360 and many many repeat prints.
I had many people double check my work and we went through many iterations of small changes. We stop making improvements!