The 4-Axis CNC Motherboard Compact Edition is designed for the demanding users of small CNC machines. It features a 240MHz dual-core 32-bit processor, USB connectivity and the ability to generate up to 120kHz pulses to simultaneously drive four stepper motors.
The four Terminal Switch and Probe inputs are opto-isolated to keep out any external electromagnetic interference while all other outputs such as Spindle PWM, Spindle Enable, Mist and Flood Coolant operate on a stable and clean 5VDC current.
The 4-Axis CNC Motherboard Compact Edition comes equipped with four DRV8825 drivers capable of driving Nema 17 and Nema 23 stepper motors that operate from 24V to 36V and require a maximum current of 2Amps.
Our 4-Axis motherboard is compatible with many GCode Sender applications for the GRBL firmware. We recommend using Focus.
Up to 4 Stepper 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
4x DRV8825 with Microstepping x32
15°C – 50 °C (59°F – 122°F)
Size (W x D x H)
105mm x 88mm x 25mm
Package Size (W x D x H)
135mm x 110mm x 60mm
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.