DIY CNC Plotter

A simple CNC drawing machine built using Arduino UNO, 28BYJ stepper motors, and ULN2003 drivers.
It interprets basic G-code commands (G0, G1, M300) to draw vector art with ~2–3mm accuracy.

Components Used

• Arduino UNO
• 3 × 28BYJ-48 stepper motors
• 3 × ULN2003 driver boards
• Servo motor for pen lift
• 3D printed frame

Workflow

1. Convert black & white PNG ➝ SVG using Inkscape
2. Convert SVG ➝ G-code using svg2gcode
3. Send G-code to Arduino over serial

Limitations

• No support for G2, G3, or absolute positioning
• Accuracy is limited due to motor type and mechanical design

Developed by Chirag Gujrathi | 1st Year B.Tech (Robotics & AI), COEP Technological University Pune