This project is a custom-designed PCB controller for CNC machines, focusing on reliability, precision, and ease of integration. The goal is to create a compact and cost-effective solution that can control stepper motors, spindle, and other CNC peripherals with high accuracy.

I decided to build this project because most CNC controller boards available in the market are either too expensive or lack the flexibility for hobbyists and makers. By designing my own PCB, I have full control over the layout, connectors, and features, making it suitable for small desktop CNC machines used for PCB milling, engraving, and light machining tasks.

The board features:

Microcontroller-based control for smooth motion and precise timing

Stepper motor driver interfaces (compatible with popular driver modules)

Relay/SSR outputs for spindle and coolant control

Limit switch inputs for homing and safety

Isolated communication interface (RS485 or USB) for robust data transfer

Compact PCB design to fit into small CNC enclosures

The system works by connecting to a computer running CNC control software (e.g., GRBL, bCNC, or CNCjs). The controller receives G-code commands, interprets them, and sends step/direction signals to the stepper drivers, precisely controlling the CNC machine's motion.

This project demonstrates how PCB design can optimize CNC control, improve reliability, and make DIY CNC machines more accessible for makers and engineers.