3D CNC Plotter

DIY CNC Plotter with 28BYJ-48 Stepper Motors A 3-axis drawing machine that converts digital vector images into physical drawings. Built around three cheap 28BYJ-48 stepper motors, an Arduino Nano, and GRBL firmware. Takes SVG files from Inkscape, converts them to G-code, and plots them with a pen. The whole thing costs under $20 in parts and can draw anything you can trace in vector format — logos, portraits, technical drawings, whatever. Hardware is dead simple: steppers for X/Y movement + one for pen lift/drop, ULN2003 driver boards, and standard Arduino. No custom PCBs, no expensive parts. Software stack is Arduino IDE → GRBL library → Inkscape for prep → any G-code sender. It's a learning project that actually produces something useful — bridges embedded programming, motion control, and CNC workflow without needing a full machine shop.