Our 4-axis motion controller 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.
The opto-isolated terminal switches and Probe inputs, operating at 12 VDC, keeps away any external electromagnetic interference while all other outputs such as Spindle PWM, Spindle Enable, Mist and Flood coolant operate with stable and clean 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.
Up to 4 Stepper or Servo motors
Max. Step Frequency
4 opto-isolated limit switch inputs (12VDC)
Tool Setter / Probe
Opto-isolated tool setter input (12VDC)
PWM output for Spindle control up to 10Khz (5VDC)
Mist and Flood coolant outputs (5V DC)
Reverse Polarity Protection; Samsung Ceramic Capacitors
ESP32-WROOM-32 with Dual Core Xtensa 32bit CPU @ 240MHz and 520Kb SRAM
Rabbit GRBL for ESP32
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
Our 4-Axis motherboard hosts an ESP32-DevKitC-32 made by Espressif Systems preloaded with the latest 32-bit version of the GRBL firmware. The ESP32-DevKitC-32 has a dual core processor at 240Mhz and 520Kb ram
The 12v power input has reverse polarity protection in order to protect your board and you electronics from wrong wiring
Limit switch and probe inputs are opto isolated and operates at 12V in order to eliminate any external electromagnetic interference
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.