Instrukcja obsługi płytki rozgałęźnej ekstrudera BIGTREETECH EBB36 EBB42 CAN V1.2

1. Wprowadzenie

The BIGTREETECH EBB36 CAN / EBB42 CAN is a specialized nozzle adapter board designed for 36 and 42 extruder stepper motors, developed by Shenzhen Big Tree Technology Co., Ltd. This board facilitates communication via either a USB port or CAN BUS, significantly simplifying wiring configurations in 3D printing setups. It is primarily intended for connecting Klipper expansion devices.

The U2C module is a USB to CAN bus converter, allowing Raspberry Pi's USB port to interface with CAN bus devices like the EBB boards, offering flexible connectivity options.

2. Główne cechy

• Aktualizacja firmware: BOOT and RESET buttons are reserved for easy firmware updates via DFU mode using USB.
• Thermistor Protection: An integrated protection circuit prevents damage to the main control chip from leakage current originating from the heating rod.
• Configurable Thermistor Pull-up: Jumper wires allow users to select thermistor pull-up resistor values, supporting PT1000 (2.2K pull-up resistors) for DIY convenience.
• USB Power Isolation: A jumper cap can be used to power the board via USB, effectively isolating the main control board's DC-DC converter from the USB 5V supply.
• Interfejs I2C: Reserved I2C interface supports filament breakage and clogging detection, and other custom DIY functions.
• MOS Tube Protection: Anti-flyback diodes on heating rod and fan ports protect MOS tubes from reverse voltage uszkodzenia.
• Power Interface Protection: Anti-reverse connection protection on the power interface prevents damage from incorrect power line connections.
• Onboard MAX31865: Supports 2-wire or 4-wire PT100/PT1000 configurations.
• Opcje komunikacji: Supports communication via CAN or USB. The 120R terminal resistor for CAN can be selected via a jumper cap, and CAN expansion interfaces are reserved.
• USB ESD Protection: An ESD protection chip on the USB port safeguards the main control board from static electricity.
• Przyjazne dla majsterkowiczów: The adapter board comes with necessary terminals, female reeds, double-way studs, and screws for various DIY projects.
• Onboard Sensor: ADXL345 accelerometer for precise motion sensing.
• Motor Driver: Onboard TMC2209 driver operating in UART mode.
• Mikroprocesor: ARM Cortex-M0 STM32F072C8T6 48MHz (or STM32G0B1CBT6, chips sent randomly).

3. Konfiguracja i instalacja

3.1 Instalacja płyty

The EBB36/EBB42 boards are applicable for 35/36/42mm motors. When installing, ensure that the pinhead of the motherboard does not contact any metal surfaces to prevent short circuits.

3.2 Schematy połączeń

Refer to the following diagrams for proper wiring of the EBB36 CAN and EBB42 CAN boards. Pay close attention to power and signal connections.

3.3 Ustawienia zworek

• Zasilanie USB: Use a jumper cap to connect the USB power input if you intend to power the board via USB. This isolates the main control board's DC-DC from USB 5V.
• CAN Bus Termination (120R): If the EBB board is used as a terminal node in a CAN communication network, ensure the jumper cap is placed at the 120R position to enable the terminal resistor.
• Thermistor Pull-up Resistors: Select the appropriate pull-up resistor values via jumper wire. For PT1000 thermistors, use 2.2K pull-up resistors.
• PT100/PT1000 Configuration: The onboard MAX31865 supports both 2-wire and 4-wire PT100/PT1000. Configure this via jumpers as needed.

3.4 U2C Module Integration

The BIGTREETECH U2C module allows a Raspberry Pi to communicate with the EBB boards via CAN bus. Below is a diagram illustrating the connection between a Raspberry Pi, U2C, and an EBB board.

3.5 Oprogramowanie układowe

The BIGTREETECH EBB36/EBB42 CAN boards currently support Klipper firmware. Firmware updates can be performed via DFU mode using the USB port and the dedicated BOOT and RESET buttons.

4. Działanie

4.1 Komunikacja

The EBB boards can communicate with your main control board via either USB or CAN BUS. CAN BUS offers long data transmission, strong anti-noise ability, real-time performance, and high reliability.

4.2 Sterowanie wentylatorem

The boards feature two CNC fan interfaces (FAN0, FAN1) with a maximum output current of 1A (peak 1.5A). Some versions, like GEN2, may include an additional 3-pin fan (FAN2) with tachometer feedback. Ensure correct power selection for fans if applicable.

4.3 Interfejsy rozszerzeń

The EBB boards provide various expansion interfaces for enhanced functionality:

• EndStop: For limit switch connections.
• I2C: For filament sensors (break/clog detection) and other I2C devices.
• Sonda: Supports various probes (Multiplexed Microprobe, BLTouch, 24V Probe port).
• RGB: Reserved port for illumination.
• PT100/PT1000: For high-accuracy temperature sensing.
• Interfejs USB: For direct connection and DFU mode.
• Interfejs CAN: For robust communication with Klipper expansion devices.

5. Konserwacja i bezpieczeństwo

The EBB boards are designed with several protection features to ensure longevity and safe operation:

• Thermistor Protection Circuit: Prevents damage to the main control chip.
• Anti-flyback Diodes: Protect MOS tubes on heating rod and fan ports from reverse voltage.
• Anti-reverse Connection Protection: Safeguards the motherboard from incorrect power input.
• ESD Protection Chip: On the USB port to prevent static electricity damage.
• Ochrona przeciwprzepięciowa: Additional protection against power surges.

Opieka ogólna: Always handle the board with care. Avoid contact between metal objects and exposed pins or components to prevent short circuits. Ensure all connections are secure before applying power.

6. Rozwiązywanie Problemów

• Brak zasilania/płyta nie odpowiada:
  1. Sprawdź objętość wejściowątage (DC12V-DC24V) and ensure correct polarity. Reversing 12/24V and GND can damage the board.
  2. Check USB power jumper settings if powering via USB.
  3. Upewnij się, że wszystkie kable są bezpiecznie podłączone.
• CAN Bus Communication Issues:
  1. Confirm that the 120R terminal resistor jumper cap is correctly placed if the EBB board is a terminal node in the CAN network.
  2. Check CAN-L and CAN-H connections for proper wiring.
  3. Ensure Klipper configuration for CAN bus is correct.
• Thermistor Reading Errors:
  1. Verify the thermistor type (PT100/PT1000/NTC) and ensure the correct pull-up resistor jumper settings are applied (e.g., 2.2K for PT1000).
  2. Check thermistor wiring for shorts or open circuits.
• Błąd aktualizacji oprogramowania sprzętowego:
  1. Ensure the board is in DFU mode (using BOOT and RESET buttons) before attempting a USB firmware update.
  2. Sprawdź kabel USB i połączenie.

For more detailed troubleshooting and advanced configurations, please refer to the official BIGTREETECH GitHub repository: https://github.com/bigtreetech/EBB

7. Specyfikacje

7.1 Model Comparison: EBB 36&42 GEN2 vs. EBB 36&42 CAN

The following table highlights key differences between the GEN2 and CAN versions of the EBB boards:

8. Wskazówki użytkownika

• Zapobiegaj zwarciom: Always be cautious during installation to ensure no metal parts come into contact with the motherboard's pinheads.
• CAN Bus Configuration: When setting up CAN communication, identify if your EBB board is the terminal node. If so, remember to install the jumper cap at the 120R position.
• Aktualizacje oprogramowania układowego: Utilize the dedicated BOOT and RESET buttons for reliable firmware updates via DFU mode over USB.
• Thermistor Compatibility: If using a PT1000 thermistor, ensure the correct 2.2K pull-up resistors are selected via the jumper wires for accurate temperature readings.
• Power Polarity: Double-check the polarity of your 12V/24V power supply before connecting to avoid damaging the board.

9. Gwarancja i wsparcie

For technical support, detailed documentation, and the latest firmware, please visit the official BIGTREETECH GitHub repository:

https://github.com/bigtreetech/EBB

Information regarding specific warranty terms is typically provided at the point of purchase or on the seller's official website. Please consult your vendor for warranty details.