Introduction

• V1

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• V2

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Product Introduction

The FLY SB2040 is a toolboard developed by Guangzhou Meilun Electronic Technology Co., Ltd. for the VORON Stealthburner print head. By using this toolboard, the complicated wiring between the original motherboard and the print head can be replaced with four wires, optimizing the layout. The SB2040 is suitable for 36mm stepper motors and integrates a CAN transceiver, USB port, TMC2209 driver, ADXL345 accelerometer, two controllable fans, and other functional components. This toolboard is compatible with the Klipper firmware.

• Supports CAN bus connection, offering more stable data transmission, lower latency, and more reliable connectivity
• Onboard TMC2209 driver, using UART mode, suitable for extruders
• Onboard ADXL345 accelerometer
• Supports leveling sensors such as BLTOUCH and PL08N, integrated XY endstops
• Supports 12-24V voltage input
• MCU: Raspberry Pi RP2040, Dual-core ARM Cortex-M0+@133MHz
• Added support for switching between 4.7K resistor (for NTC thermistor) or 1K resistor (for PT1000)
• CAN interface uses XT30(2+2), supporting 15A current, peak 30A
• Added onboard NTC100K resistor for chamber temperature measurement
• ADXL345 INT1 and INT2 connected to the MCU for individual users for leveling purposes
• Supports high-voltage input endstops
• Includes a 3-meter CAN cable to prevent signal loss caused by improper crimping of terminals
• Supports 2/3/4-wire fans
• Split design, easy to disassemble the Stealthburner
• Compatible with the hartk Stealthburner Toolhead Board (the fan PCB may not need replacement)
• Interfaces: Controllable fans *3, RGB *1, Endstops *3, Heater *1, Thermistor *1

Product Specifications

• Supports switching between Klipper CAN mode, RS232 mode, and RRFCAN mode
• Connection interface uses XT30(2+2) connector, supporting 15A current, peak 30A
• MCU: Raspberry Pi RP2040, Dual-core ARM Cortex-M0+@133MHz
• Input voltage: DC12-24V
• Heater maximum output current: 5A
• Fan interface maximum output current: 1A

Product Precautions

Output Port	Maximum Current at 24V	Maximum Current at 12V
Heater Port	5A	2.5A
Fan Port	1A	0.5A