The Eggbot is a beginner-friendly open source "CNC" artbot that can draw just about anything on spherical or egg-shaped surfaces!
The Eggbot, an epic idea that you would think a large toy company would have come up with, but no - it was makers! The kit is based on the original design by Bruce Shapiro, dating back to 1990. The Evil Mad Science version, the "Egg-Bot 2.0," is a modern and friendly update, designed with the assistance of Bruce and his team.
The Eggbot Deluxe Edition kit is easy to assemble in a couple of hours, and it only requires a couple of basic tools like miniature Phillips-head and flathead screwdrivers. You'll also need a reasonably modern computer with an available USB port (Mac, Windows or Linux), plus internet access to download assembly instructions and necessary software.
This kit can draw on spherical or egg-shaped objects from the size of a ping pong ball to that of a small grapefruit, roughly 1.25 to 4.25 inches in diameter (3-10cm). It's super adjustable and is designed to draw on all kinds of things that are normally "impossible" to print on. This includes not just eggs but ping pong balls, light bulbs, mini pumpkins, and even things like wine glasses — with a bit of work.
Basic operation of the eggbot is much like that of a printer driver: you import or make a drawing in Inkscape, the excellent/popular and free vector graphics program, and use the extensions to plot your drawing onto whatever object you've mounted into the jig. It's all handled through an easy to use graphical user interface, and works cleanly on Mac, Windows and Linux.
Eggbot "Deluxe Edition" Kit Includes:
Extensive documentation about the Eggbot kit is available here, including assembly and use instructions, open source hardware release documents and example plot files. Check out egg-bot.com for more info.
Looking for more accessories like a diamond engraving tip? Those can be found here.