Home / printhead / toolhead-boards / BTT-EBB-Gen2
BigTreeTech EBB Gen 2 Toolhead Boards¶
The BigTreeTech EBB Gen 2 series (EBB36 and EBB42) are compact CAN bus toolhead boards commonly used in Voron and other high-performance 3D printers.
This page consolidates all setup, firmware flashing, wiring, and configuration.
Overview¶
Gallery¶
Features¶
- Extensive protection on nearly every input and output to reduce the risk of accidental wiring damage.
- Simple communication selection via a single jumper, with the passthrough port automatically adapting to USB or CAN mode.
- Enhanced USB stability through onboard signal conditioning hardware.
- Rated for high-temperature environments, with verified operation in chambers up to 75 °C
(active cooling recommended above 60 °C). - 3-pin tacho fan support for detecting hotend fan failure.
- Selectable 5 V or 24 V output for all fan ports using onboard jumpers.
- Built-in I²C header for environmental sensors, eddy probes, and auxiliary devices.
- Dedicated thermistor input for monitoring motor driver temperature.
- Three PWM-controlled fan outputs, each protected against short-circuit and thermal overload.
- Reset and boot buttons placed for easy toolhead access.
- Powered by an ARM Cortex-M0+ STM32G0B1CBT6 running at 64 MHz.
- Ground-referenced mounting holes designed to dissipate static buildup and reduce ESD impact.
Specifications¶
- Product Name: BIGTREETECH EBB36 / EBB42 GEN2 V1.0
- MCU: ARM Cortex-M0+ STM32G0B1CBT6 @ 64 MHz
- Input Voltage: 24–28 V DC
- Logic Voltage: 3.3 V
- Heater Output: Up to 120 W (24 V / 5 A)
- Thermistor Support: PT1000 or standard NTC
- Fan Outputs:
- 2 × 2-pin PWM fans (FAN0, FAN1)
- 1 × 3-pin PWM+tacho fan (FAN2)
- Fan Current Rating: 1 A total continuous, 1.5 A peak
- Fan Protection: Over-current and over-temperature protection on all ports
- 5 V Rail Output: Up to 1.5 A peak
- Expansion Ports:
- Multiplexed probe interface (MicroProbe, BLTouch, 24 V inductive probes)
- RGB output
- Thermistor (TH)
- Motor driver (TMC2209 onboard)
- USB / CAN-FD communication ports
- Additional I/O breakouts depending on configuration
Installation¶
Note
This Section is a work in progress, our team is currently testing the ebb gen 2 series of boards and will make sure to up date the installation and setup process as soon as it is ready.
Klipper Configuration Example¶
# This file contains common pin mappings for the BIGTREETECH EBB36
# GEN2 board. To use this config, the firmware should be compiled for the
# STM32G0B1 with "8 MHz crystal" and "USB (on PA11/PA12)" or "CAN bus (on PB12/PB13)" .
# The "EBB36 GEN2" micro-controller will be used to control the components on the nozzle.
# See docs/Config_Reference.md for a description of parameters.
[mcu EBB]
serial: /dev/serial/by-id/usb-Klipper_Klipper_firmware_12345-if00
#canbus_uuid=a62a88bb28e3
[temperature_sensor EBB36]
sensor_type: Generic 3950
sensor_pin: EBB:PA0
pullup_resistor: 2200
[lis2dw]
cs_pin: EBB:PB1
spi_bus:spi2_PB2_PB11_PB10
axes_map: x,y,z
[extruder]
step_pin: EBB:PB14
dir_pin: EBB:PA8
enable_pin: !EBB:PB6
microsteps: 16
rotation_distance: 33.500
nozzle_diameter: 0.400
filament_diameter: 1.750
heater_pin: EBB:PB4
sensor_type: EPCOS 100K B57560G104F
pullup_resistor: 2200
sensor_pin: EBB:PA3
control: pid
pid_Kp: 21.527
pid_Ki: 1.063
pid_Kd: 108.982
min_temp: 0
max_temp: 250
[tmc2209 extruder]
uart_pin: EBB:PB3
run_current: 0.650
stealthchop_threshold: 999999
#[filament_switch_sensor fil_det]
#switch_pin: EBB:PD0
[fan]
pin: EBB:PD3
[heater_fan hotend_fan]
pin: EBB:PA5
heater: extruder
heater_temp: 50.0
#[heater_fan 3w_fan2]
#pin: EBB:PD2
#tachometer_pin: EBB:PA4
#[neopixel hotend_rgb]
#pin: EBB:PC7
#[bltouch]
#sensor_pin: ^!EBB:PB8
#control_pin: EBB:PB5
#[output_pin rled]
#pin:EBB:PA2
#[temperature_sensor BME280]
#sensor_type: BME280
#i2c_mcu: EBB
##i2c_bus: i2c3_PA7_PA6
#i2c_software_scl_pin: EBB:PA7
#i2c_software_sda_pin: EBB:PA6
#endstop_pin: EBB:PA15
#diag_pin: ^EBB:PD1
# This file contains common pin mappings for the BIGTREETECH EBB42
# GEN2 board. To use this config, the firmware should be compiled for the
# STM32G0B1 with "8 MHz crystal" and "USB (on PA11/PA12)" or "CAN bus (on PB12/PB13)" .
# The "EBB42 GEN2" micro-controller will be used to control the components on the nozzle.
# See docs/Config_Reference.md for a description of parameters.
[mcu EBB]
serial: /dev/serial/by-id/usb-Klipper_Klipper_firmware_12345-if00
#canbus_uuid=a62a88bb28e3
[temperature_sensor EBB42]
sensor_type: Generic 3950
sensor_pin: EBB:PA0
pullup_resistor: 2200
[lis2dw]
cs_pin: EBB:PB1
spi_bus:spi2_PB2_PB11_PB10
axes_map: x,y,z
[extruder]
step_pin: EBB:PD3
dir_pin: EBB:PD2
enable_pin: !EBB:PB6
microsteps: 16
rotation_distance: 33.500
nozzle_diameter: 0.400
filament_diameter: 1.750
heater_pin: EBB:PB0
sensor_type: EPCOS 100K B57560G104F
pullup_resistor: 2200
sensor_pin: EBB:PA1
control: pid
pid_Kp: 21.527
pid_Ki: 1.063
pid_Kd: 108.982
min_temp: 0
max_temp: 250
[tmc2209 extruder]
uart_pin: EBB:PB3
run_current: 0.650
stealthchop_threshold: 999999
#[filament_switch_sensor fil_det]
#switch_pin: EBB:PA3
[fan]
pin: EBB:PB8
[heater_fan hotend_fan]
pin: EBB:PB15
heater: extruder
heater_temp: 50.0
#[heater_fan 3w_fan2]
#pin: EBB:PB4
#tachometer_pin: EBB:PB9
#[neopixel hotend_rgb]
#pin: EBB:PB14
#[bltouch]
#sensor_pin: ^!EBB:PA5
#control_pin: EBB:PA4
#[output_pin rled]
#pin:EBB:PA8
#[temperature_sensor BME280]
#sensor_type: BME280
#i2c_mcu: EBB
##i2c_bus: i2c1_PA9_PA10
#i2c_software_scl_pin: EBB:PA9
#i2c_software_sda_pin: EBB:PA10
#endstop_pin: EBB:PA2
#diag_pin: ^EBB:PD1