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BIGTREETECH Octopus MAX EZ 32Bit Motherboard

BIGTREETECH Octopus MAX EZ 32Bit Motherboard

Regular price $75.00 USD
Regular price $78.01 USD Sale price $75.00 USD
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BIGTREETECH Octopus MAX EZ, a 32 bit motherboard, is an upgraded version of Octopus Pro developed by the 3D printing team of Shenzhen Big Tree Technology Co., Ltd. Its self-developed stepper motor sockets enhance safety and user experience, and it adds a series of features that Octopus Pro does not have, greatly enhancing its DIY capabilities.


  • 32 bit 550 MHz ARM Cortex-M7 series STM32H723ZET6 MCU
  • Onboard BOOT button to enable DFU mode to update bootloader
  • The thermistor circuit is protected to prevent MCU damage from shorted heated bed and heater cartridge connections
  • Selectable voltage (24V, 12V, 5V) for CNC fan, no more need for external stepdown thus preventing board damage from user error
  • Upgraded with eFuse protection, which responses faster with strong protection, effectively protecting the motherboard from being damaged caused by short circuits, over-current, electric spark, etc.
  • MCU firmware can be upgraded via SD card, or use DFU via Klipper's make flash command
  • 10 EZ driver sockets, working with pinless driver, safer to use; Onboard SPI and UART, can be used by simply setting in the firmware, no need for a jumper.
  • Support power loss recovery, filament runout sensor, CAN, auto power-off, BLTouch, RGB, etc
  • Replaceable fuse for easy maintenance;
  • 3 x 4 pins fan ports, also for connecting water cooling system
  • Onboard proximity switch port, supports NPN and PNP types, 24V, 12V, 5V voltage selectable
  • Onboard SPI interface for connecting acceleration sensor to enable Klipper's input shaping.


  • Dimensions:160mm x 100mm
  • MCU:ARM Cortex-M7 STM32H723ZET6 550MHz
  • Driver Input Voltage:24V, HV(≤56V) Selectable
  • Motherboard Input Voltage:VIN=DC12V or DC24V
  • Heated Bed Input Voltage:BED IN=DC12V or DC24V
  • Logic Voltage:DC 3.3V
  • Heater Connection:Heated Bed (HB), Heater Cartridge (HE0, HE1, HE2, HE3)
  • HB Port Max Current:10A Continuous, 12A Instantaneous
  • Heater Cartridge Max Current:5.5A Continuous, 6A Instantaneous
  • Fan Port:2 pins CNC Fan (FAN0, FAN1, FAN2, FAN3), 4 pins CNC Fan (FAN4, FAN5, FAN6), Always On (24V FAN x 2).CNC Fan and MFAN Voltage Selectable (5/12/24V)
  • Fan Port Max Current:1A Continuous, 1.5A Instantaneous
  • Overall Max Current(Heater Cartridge+Driver+All Fans):<12A
  • Expansion Port:BLTouch (Servos, Probe), PS-ON, FWS, PWRDET, RGBx2, SPI, IND-Probe, CAN, WIFI, TFT
  • Motor Driver:Support EZ5160, EZ2209, EZ2225, EZ2226, EZ2208, EZ2130...
  • Driver Mode:SPI, UART
  • Motor Socket:Motor1, Motor2, Motor3 (Dual Motor Sockets), Motor4, Motor5, Motor6, Motor7, Motor8, Motor9, Motor10 10 Channels in Total
  • Thermistor:5 x 100K NTC, four of which are selectable for NTC and PT1000
  • Display:MINI12864 (FPC Connection), TFT Serial
  • PC Connection:Type-C
  • Supported Kinematics:Cartesian, Delta, Kossel, Ultimaker, CoreXY
  • Recommended Slicer/Console:Cura, Simplify3D, Pronterface, Repetier-host, Makerware
  • OctopusMaxEZ accessory ecology: EZ series drive, EZ31865, PI4B+CB1, Mini12864 V2.0, TFT24/35/50/70 (only used under Marlin firmware)
  • Adapting screen: TFT series serial port screen, namely: TFT24, TFT28, TFT43, TFT50, TFT70, TFT35 V3.0, TFT35 E3 V3.0, (not suitable for SPI and HDMI screens)
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