Micro Mini CNC Plotter - Part 2 - Testing Hardware and Software

This is my first CNC project, a micro-mini CNC plotter built from 2 DVD drive stepper motors and one camera stepper motor. It has a 36mm by 36mm drawing area (that’s the size of the big square you see being drawn). It uses a cartridge from a ball-point pen to draw. Not the best for plotting, but small enough to fit in the print head. I’m looking for a felt-tip pen cartridge to replace it, but haven’t found one small enough. In terms of hardware, I made it from parts I had sitting around. As you can see,