I intend to build a drawing robot soon as a part of a bigger project that will hopefully culminate in a short animation. I have just been given a broken HP Deskjet D4260 so I already have a few parts I might need. I am not yet fully decided on which approach to take, so here’s a roundup of different drawing machines to inspire me.
Have I mentioned yet how much I love Alex Weber’s projects? The one that led me to find his blog was Der Kritzler - a robot that draws on the windows. It uses a combination of Processing, ImageMagick and Potrace to create the graphics and the movement of the bot itself is controlled by an Arduino. The device is suspended on notched tape which controls the movements.
Hektor was the project that made me fall in love with physical hacking, it’s the first one of its kind that I could find - built in 2002. It’s a small portable spraypainting device that can cover a huge wall area, but packs away into a small suitcase. Its construction directly inspired Der Kritzler - the spraycan’s movements are controlled by toothed belts.
Arduino-controlled suspended plotter. 3 arms are controlled by servos. I like this one a lot despite the lack of precision. Its creator, Puiu Bogdan, explains that the concept itself results in very precise drawings, but his implementation still needs to be perfected. Since it took him 7 months to build this prototype I reckon it’s a little too complicated for my purposes.
Definitely can’t make anything similar as I intend to use mine at home, but this is cool.
Euphyscott made this polargraph. Although it’s very slow in drawing these types of images, the end result is pretty neat. Also, bonus points for posting the code and detailed process descriptions on the polargraph’s website and on Instructables. You can also buy some of the bits used to build your own from Euphyscott.
A small circuit board featuring radio-controlled servos from a toy car drives the solenoids attached to each spray can, which in turn apply pressure to the nozzles. Both the arm and the spray cans are controlled using toy car’s radio controller, allowing the user to move the arm in a smooth arc while spraying with each of the six spray cans simultaneously, creating a large rainbow painting within seconds.