Manufacturers put a lot of effort into their packaging (there is an entire engineering discipline just for that) and some of it can be quite beautiful. But it usually still ends up in the landfill or, at best, in a recycling center. However, if you’re the type of person who can see the beauty in wine bottles, mason jars, and tin cans, then you can build the Bottle Plotter to transform trash into treasure.
This machine, developed by VGaman, is a CNC pen plotter with one linear axis swapped out for a rotary axis. That means that instead of plotting on a traditional XY plane, it plots around a cylinder. The “pen” can be anything that fits in the holder and the possibilities are almost endless. Paint markers seem especially well-suited to this kind of work, but there are certainly other options that may produce interesting results on some materials.
The Bottle Plotter is relatively affordable to build, as most of the parts are 3D-printable. The exceptions are fasteners, bearings, rods, and the electronic components. Those electronics include an Arduino UNO Rev3 board, a CNC shield, and stepper motors. VGaman’s design does include a Z axis (to move the pen closer to and further from the workpiece surface), so the machine requires three stepper motors.
The Arduino runs GRBL firmware and can accept any compatible G-code. The easiest way to generate that G-code is with a plugin for Inkscape, which will let users create artwork and then plot that all within one piece of software. Swap pens between toolpaths to make cool multicolor designs!
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