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Woah, I may end up trying this on my axidraw v3/a3. I like that the supply list is pretty minimal.

You should check out the rest of the Licia He's work too. She's doing really cool stuff with watercolors and plotters, with a free course on it actively in the works. Unfortunately her site went down some time recently, yet archive.org has it here:

Course: https://web.archive.org/web/20240525172327/https://www.eyeso...

Course GH: https://github.com/LiciaHe/painting_with_plotters

Portfolio: https://web.archive.org/web/20240415055736/https://www.eyeso...

Interesting approach with the brush. I added a peristaltic pump on mine to pump paint or any fluid to a syringe tip on the XY stage [1]. Example with bleach pointillism to do stuff on fabric [2]

[1] https://x.com/dsp_person/status/1591146165181231104

[2] https://x.com/dsp_person/status/1593162129959686144

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