BIGTREETECH Octopus MAX EZ

The BIGTREETECH Octopus MAX EZ is an optimized 32-bit 3D printer control board based on the Octopus Pro, using self-developed stepper motor driver sockets to enhance safety and user experience, with many new features not found on Octopus Pro to increase DIY potential.

No EZ stepper drivers included, please buy these separately!

Feature Highlights

• 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, eliminating the need for external buck modules, thereby reducing the likelihood of motherboard damage.
• 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.

Specifications

• Dimensions: 160mm x 100mm, for details please refer to BIGTREETECH Octopus MAX EZ V1.0-SIZE.pdf
• Mounting Size: Please refer to BIGTREETECH Octopus MAX EZ V1.0-SIZE.pdf
• 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: USB Type-C
• Supported Kinematics: Cartesian, Delta, Kossel, Ultimaker, CoreXY
• snaRecommended Slicer/Console: Cura, Simplify3D, Pronterface, Repetier-host, Makerware

Dimensions

Connector Diagram

Pinout Diagram