4-Axis CNC Motherboard

Full 4-Axis CNC control board running the GRBL firmware on a 32-bit dual-core processor @240mhz offering maximum step rate of 120KHz

4-Axis CNC Motherboard view 0
4-Axis CNC Motherboard view 1
4-Axis CNC Motherboard view 2
4-Axis CNC Motherboard view 3


Motor Ouputs

Up to 4 Stepper or Servo motors

Max. Step Frequency


Limit Switches

3 opto-isolated limit switch inputs

Tool Setter / Probe

Opto-isolated tool setter input (12VDC)

Spindle Control

PWM output for Spindle control up to 10Khz (5VDC)


Mist and Flood coolant outputs (5V DC)


Reverse Polarity Protection; Samsung Ceramic Capacitors



ESP32-WROOM-32D with Dual Core Xtensa 32bit CPU @ 240MHz and 520Kb SRAM


GRBL for ESP32



USB & Bluetooth

Voltage Input

12V DC

Power Ιnput


Ambient Τemperature

15°C – 50 °C (59°F – 122°F)


Size (W x D x H)

103mm x 66.4mm x 25mm

Package Size (W x D x H)

160mm x 70m x 70mm

Net Weight


Full 4-Axis GRBL CNC Control Board

With a 32-bit 240Mhz dual-core processor, USB and Bluetooth connectivity and 120 kHz maximum step frequency, the 4-Axis CNC motherboard has everything a modern CNC Controller needs !

Our 4-axis CNC motherboard comes fully assembled and with the GRBL firmware pre-installed. It has a dual core Xtensa 32-bit LX6 microprocessor, which operates at 240 MHz and can drive to up to 4 Stepper or Servo motors with a stable and clean 5VDC signal.

It features opto isolated terminal switches and Probe inputs, operating at 12 VDC, to keep away any external electromagnetic interference while all other outputs such as Spindle PWM, Spindle Enable, Mist and Flood coolant operate at 5VDC.

The 12VDC power input has reverse polarity protection and ceramic capacitors, made by Samsung, to filter the input current.

Our 4-Axis motherboard is compatible with many GCode Sender applications for the GRBL firmware. We recommend using Focus.

Find more help on our Help & Support Section



Our 4-Axis motherboard hosts an ESP32-DevKitC-32D made by Espressif Systems preloaded with the latest 32-bit version of the GRBL firmware. The ESP32-DevKitC-32D has a dual core processor at 240Mhz and 520Kb ram

Reverse Polarity Protection

Reverse Polarity Protection

The 12v power input has reverse polarity protection in order to protect your board and you electronics from wrong wiring

Opto Isolated Inputs

Opto Isolated Inputs

Limit switch and probe inputs are opto isolated and operates at 12V in order to eliminate any external electromagnetic interference

Focus - CNC Control Software

Focus - CNC Control Software

The 4-Axis CNC Motherboard is compatible with most free GRBL GCode Senders on the internet.

We recommend that you use Focus which has been developed to make the most of the capabilities of our hardware.