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Introduction

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This document is currently being migrated. Please visit the old documentation until the migration is complete.

1. Product Introduction

FLY SB2040 V3 is a tool board launched by Guangzhou Mellow Electronic Technology Co., Ltd. for the VORON Stealthburner printhead. With this tool board, you can replace the complex wiring between the mainboard and the printhead with just four wires, optimizing the layout. SB2040 is suitable for both stealthburner and afterburner, integrating CAN transceiver, RS232 transceiver, USB port, TMC2209 driver, LIS2DW accelerometer, three controllable fans, and other functionalities. This tool board is compatible with Klipper and RRF firmware.

1.1 Product Features​

  • Includes a Boot button, allowing users to enter Boot mode for firmware updates via TypeC
  • Supports Klipper firmware and RRF firmware
  • Supports CAN mode, RS232 mode, and RRF CAN mode
  • In RS232 mode, it offers higher transmission rates and stronger stability. In CAN mode, it supports CAN extension with reserved CAN extension interface
  • Temperature sensor support: onboard MAX31865 chip, compatible with PT100 and PT1000 temperature sensors
  • Onboard LIS2DW accelerometer and LDC1612 sensor
  • Reserved RGB interface, onboard 2209 driver, supports various leveling sensors like klicky, Voron Tap, PL08n, etc.
  • Supports 12-24V voltage, 15A current input, with an enlarged heating rod port, rated current 10A

1.2 New Features​

  • Supports switching between Klipper CAN mode, RS232 mode, and RRF CAN mode
  • Added RS232 mode for higher transmission rates, stronger stability, and easier debugging
  • Added RRF CAN mode, allowing switch to RRF tool board, enhancing compatibility
  • Added CAN extension interface for easier CAN device expansion
  • Added terminal resistor switch, its 120R terminal resistor can be selected via switch, no need for jumpers
  • Added 1 meter power/signal cable, with twisted pair design for better anti-interference performance

1.3 Product Specifications​

  • MCU: Raspberry Pi rp2040, Dual core ARM Cortex-M0+@133MHz
  • Connection interface uses XT30(2+2) connector, supports 15A current, peak at 30A
  • Firmware: Reprap/Klipper
  • Input Voltage: DC12V-24V
  • Logic Voltage: DC3.3V
  • Onboard Sensors: LIS2DW with optional ldc1612 and max31865
  • Heating Rod Interface: Heating Rod (HEAT0)
  • Expansion Interfaces: RGB, EndStop, PT100/PT1000, XH2.54-2P CAN port
  • Fan Interfaces: One DC fan, two DC or PWM fans
  • Motor Driver: Onboard TMC2209
  • Temperature Sensors: One 100K NTC or PT1000 (TH0), one PT100/PT1000 optional

4. Product Categories

RRF tutorial link RRF

SB2040V3Plus V3Max V3Pro V3Pro Plus V3Pro Max V3
Drivealt textalt textalt textalt textalt textalt text
Klipper CANBus✅✅✅✅✅✅
Klipper RS232✅✅✅✅✅✅
RRF CANBus❌❌✅❌❌✅
LIS2DW✅✅✅✅✅✅
MAX31865❌✅✅❌✅✅
LDC1612❌❌✅❌❌✅