CoreXY pen plotter

thingiverse

Recently I got excited about CoreXY and wanted to see how it works, so I designed a simple pen plotter. I'm aware that there are many similar designs already, but I wanted mine to use parts that I'm familiar with and are also available for a relatively low cost. I ended up reusing various 3D printer parts, an Arduino board, and a RAMPS board, plus pre-cut aluminum profiles. You can find the blend file among the files for download, which contains the entire design. I also used some parts from other projects. Specifically, the servo-actuated pen holder is from this project: https://www.thingiverse.com/thing:2374238 I'm fairly certain that all of the parts can be printed without support material. I used ABS plastic, but PLA or PETG should work just as well. Here's a list of the parts that I used: * Two Nema 17 stepper motors * An Arduino board + RAMPS board + two stepper drivers * Two end-stop switches * Four aluminum profiles (I used two 360 mm and two 320 mm, but any length should work) * Four 8 mm steel rods (two 370 mm and two 290 mm) * GT2 6 mm belts (approximately 4 meters) * Sixteen F623zz ball bearings for pulleys * Some M3x40 and M3x16 bolts for pulleys and motors * Some M6x12 bolts for aluminum profiles * Eight LM8UU linear bearings * Some thin zip ties to hold linear bearings in the carriage I'm sure I forgot something, so if you find out what it is, please let me know in the comments. I used standard Marlin firmware for the Arduino board. Of course, you'll need to make some changes in Configuration.h to get it working with CoreXY and other tweaks. To generate G-code, I use Inkscape, which is a great open-source tool for creating vector graphics, along with this extension that allows you to save your drawing directly as G-code: https://github.com/soukupak/inkscape-unicorn-for-marlin If you need any help getting this thing to work, just let me know in the comments and I'll be happy to assist.