CNC Drawing Machine: Precision Automation with GRBL

A CNC (Computerized Numerical Control) Drawing Machine uses stepper motors to precisely move a pen (or laser) across a surface, creating drawings from digital images.

What is GRBL?

GRBL is an open-source firmware for Arduino that interprets G-code (the language of CNC machines) and controls stepper motors accordingly. It turns your Arduino Uno into a powerful motion controller.

Hardware Components

• Arduino Uno
• CNC Shield V3
• 2x or 3x NEMA17 Stepper Motors
• A4988 or DRV8825 Stepper Drivers
• 12V Power Supply (3A+)
• Lead Screws or GT2 Belts
• Servo Motor (for pen lift)
• Frame (3D printed, aluminum, or even old DVD drives!)

Software Workflow

1. Image to G-code: Use Inkscape (free) with the "Gcodetools" plugin to convert vector images to G-code.
2. Send G-code: Use a sender like Universal G-code Sender (UGS) or CNCjs to stream commands to Arduino.
3. Execute: GRBL moves the motors step-by-step.

Upgrade Ideas

• Replace pen with a low-power diode laser for engraving wood or PCBs.
• Build a larger frame for A3-sized drawings.

Our Ready-Made Kit

Check out the CNC Drawing Machine Using Arduino & GRBL kit!