CNC Laser Electronics

What is it

This controller is designed to operate a wide range of CNC machines. It can drive six motors and supports various spindles and lasers—including those with PWM, 485, and 0-10V outputs — compatibility with FluidNC, GRBLHAL, and GRBL1.1f.

Key Features

• Integrated ESP32 (Programmed with FluidNC. Includes a generic configuration)
• (6) Motor connectors for external stepper drivers (5v signals). Each motor has separate step, direction and enable signals.
• Inputs for switches (limits, probes, control, etc)
• Communication Mode: USB Cable or Blue Tooth or WIFI
• Spindles (many types supported). Some multi-spindle arrangements are possible like RS485 & laser on the same machine.
• 0-10V controlled spindles with additional forward and reverse direction signals
• PWM Speed controllers with optional separate enable signals
• Relay (on/off) controlled spindles.
• BESC (Brushless Motor) based spindles
• Lasers with PWM and enable
• Unused spindle 5V outputs can be used for any output function (coolant, etc)
• Micro SD card socket for local storage of gcode files
• Module socket for GPIO extenders and Pendant interfaces.
• Compatible with PiBot Stepper Motor Driver V4
• Compatible with PiBot Isolated Relay Board V4
• Tested the on board TMC2130 Driver - only for 4.9 PB or later
• Tested the Extend TMC5160 Driver - only for 4.9 PB or later

Firmware Features

• A. For the FluidNC official original firmware, It adopts the pin configuration of FluidNC 6x to ensure enhanced compatibility，FluidNC is very easy to configure. You never have to compile any software. All configuration, upgrading, etc can be done via web browser. we provide yaml example configuration file.
• B. For grblHAL and GRBL1.1f, you can configure them directly via the WebBuild platform on grblHAL's official website. This ESP32 flash tool also allows for easy firmware uploading. Moreover, thanks to grblHAL's built-in compatibility mode for GRBL1.1f, you can utilize a wide range of software that requires GRBL1.1f support.
• C. You can find relevant information on the official FluidNC and GRBLHAL wiki sites. In parallel, we are optimizing our Simple Tutorial with clear visuals and videos to streamline the learning process.
• D. Compatible Software vs. Firmware, This table is based on our tests in October 2025. Be aware that software changes might have occurred or there might be some inaccuracies, so you can run your own tests.

FluidNC Resources

Compatible with the FluidNC official original firmware, we provide yaml example configuration file.

GRBLHAL Resources

Compatible with the GRBLHAL official Web-builder, GRBLHAL can set to GRBL1.1f level.

The PIBot V4 board natively supports the GRBLHAL OLED, as this code was contributed by Luc from France (ESP3D Developer) and tested using the PiBot V4 mainboard.

PiBot v4 Series Product Overview Diagram