EBB42 CAN Bus with MAX31865 Adapter Board Hot End PCB Board Filament Break Blockage Detection for 42 Stepper Motor

EBB42 CAN Bus with MAX31865 Adapter Board Hot End PCB Board Filament Break Blockage Detection for 42 Stepper Motor

EBB42 CAN Bus with MAX31865 Adapter Board Hot End PCB Board Filament Break Blockage Detection for 42 Stepper Motor

• BIGTREETECH EBB42 CAN Bus with MAX31865 is a toolhead-mounted control and adapter board designed to simplify wiring and improve reliability in modern 3D printer builds.
• By moving key connections to the toolhead and using CAN Bus (or USB) communication, it reduces cable clutter, improves signal stability, and supports cleaner, more serviceable toolhead setups—especially important for high-speed printers in India where long moving cable bundles can introduce noise and fatigue.

   

• This board is built for real-time toolhead control, supporting core components such as the hotend heater, fans, thermistors, and multiple expansion ports.
• It also includes an onboard stepper driver (TMC2209) for extruder control with UART mode, making it suitable for 42-stepper motor toolheads and compact direct-drive setups where local motor control is beneficial.

Specifications

• Appearance size: 40 × 40 mm
• Installation: hole spacing 31 × 31 mm, M3 screw holes ×4
• Microprocessor: ARM Cortex‑M0 STM32G0B1CBT6
• Input voltage: DC12V–DC24V, 9A
• Logic voltage: DC 3.3V
• Heating interface: E0, max output 5A
• Onboard sensor: ADXL345
• Fan interface: two CNC fans (FAN0, FAN1)
• Fan output: 1A (peak 1.5A)
• Expansion interfaces: EndStop, I2C, Probe, RGB, PT100/PT1000, USB, CAN
• Motor drive: onboard TMC2209
• Drive mode: UART
• Stepper motor interface: EM
• Temp sensor inputs: TH0 (100K NTC or PT1000) + optional PT100/PT1000
• USB port: USB Type‑C
• DCDC 5V output: max 1A

Applications

• Klipper CAN toolhead builds and CAN-enabled printer upgrades
• High-speed printers needing cleaner wiring and stable signals
• Toolheads using PT100/PT1000 temperature sensors
• Builds using ADXL345 for resonance tuning and input shaping
• Toolheads needing jam/runout detection via I2C expansion

Features

• Smart upgrade: supports 2‑wire/4‑wire PT100/PT1000, CAN/USB, selectable 120Ω terminal resistance, RGB support ADXL345 toolhead
• Easy to use: simplifies wiring; onboard BOOT and RESET enable DFU firmware updates via USB
• Superior security: jumper-select USB power, thermistor protection, MOS/thermal safety considerations, and USB ESD protection
• Rich expansion: reserved I2C for filament runout/jam detection or DIY sensors; bundled terminals and hardware for DIY builds

Package Include

• 1 piece of EBB42 CAN Bus with MAX31865.