BIGTREETECH EBB36 CAN V1.2 Toolhead Board — STM32G0B1, MAX31865

Details

A proven CAN toolhead board for Klipper printers. The EBB36 bolts to the back of a 36 mm pancake extruder motor and runs the extruder, hotend heater, thermistor, fans, probe and LEDs from one board, so the umbilical to your toolhead shrinks to power plus two data wires. It talks to Klipper over CAN or USB.

This is the V1.2 with the STM32G0B1 chip and the MAX31865 on board, so it reads PT100 and PT1000 sensors directly as well as regular 100K NTC thermistors. An ADXL345 accelerometer is built in for input shaping, so no separate sensor on the toolhead.

Specs

• MCU: ARM Cortex-M0+ STM32G0B1CBT6, 64 MHz
• Input: 12–24 V DC, 6 A
• Stepper driver: TMC2209 on board
• Heater output (E0): 5 A max
• Fans: 2 × PWM outputs (FAN0, FAN1), 1 A, 1.5 A peak
• Temperature: 1 × 100K NTC or PT1000 (TH0), 1 × PT100/PT1000 via MAX31865, 2- or 4-wire
• Accelerometer: ADXL345
• Communication: CAN or USB, 120 Ω CAN termination selectable by jumper
• Size: 51.5 × 37 mm, 2 × M3 mounting holes at 43.85 mm spacing

Good to know

For CAN you need either a USB-to-CAN adapter or a mainboard that can act as a CAN bridge, such as the Manta M8P. Boot and reset buttons let you flash Klipper over USB in DFU mode. Protection is built in on the thermistor input, heater and fan outputs (flyback diodes) and power input (reverse polarity). Wiring diagrams and sample Klipper configs are on BIGTREETECH's EBB GitHub.

Pre-order. I'm bringing this board in directly from BIGTREETECH. Expected to ship in 3–4 weeks. As soon as it lands in the Netherlands it goes out to you, and you pay no import fees or customs on top.

BIGTREETECH part number 1030000175.