YouTuber Shane Wighton built a robot that paints murals

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Arduino TeamNovember 1st, 2021

Driven by a desire to print massive pieces of art on his new studio’s blank wall, Shane Wighton of the YouTube channel Stuff Made Here set out to create a large painting robot, which he calls “Janksy” after the famous artist and the jankiness of the construction.

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In principle, the device works by using a large gantry that spans the entire length of the wall to move horizontally while a series of cables and pulleys move it vertically. To avoid vibrations caused by moving such a large amount of weight so quickly, a second and far smaller/faster gantry houses a spray nozzle that deposits paint dots. All of this hardware is controlled by an Arduino Uno that translates positional commands into movements for the onboard stepper motors and servo.

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Generating the dot array is done by first taking the initial digital image and converting it into four layers that each correspond to cyan, yellow, magenta, and black, just like a traditional inkjet printer. From there, every dot is scaled based on the intensity of the color, with larger dots appearing brighter and smaller ones showing up as dimmer. 

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After painting the wall over the course of several days, Wighton’s mural of his wife’s signature glare was complete. And even though it doesn’t look like much up close, taking a few steps back makes the entire thing come alive — imperfections and all. 

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Website: LINK

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