Introduction

• V1

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• V2

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Product Introduction

The FLY SB2040 is a toolhead board for the VORON Stealthburner print head developed by Guangzhou Meilun Electronic Technology Co., Ltd. Using this tool board, four wires can replace the complex wiring between the mainboard and the print head, optimizing the layout. The SB2040 is suitable for 36 stepper motors and integrates a CAN transceiver, USB port, TMC2209 driver, ADXL345 accelerometer sensor, two controllable fans, and other functions. This tool board is compatible with the Klipper firmware.

• Supports CAN bus connection for more stable data transmission, lower latency, and more reliable connections.
• Onboard TMC2209 driver, operating in UART mode, can be used for the extruder.
• Onboard ADXL345 accelerometer sensor.
• Supports leveling sensors such as BLTOUCH and PL08N, with integrated XY limit switches.
• Supports 12-24V voltage input.
• MCU: Raspberry Pi RP2040, Dual-core ARM Cortex-M0+ @133MHz.
• Added support for switching between 4.7K resistors (for NTC thermistors) or 1K resistors (for PT1000).
• CAN interface uses XT30 (2+2), supports 15A current, with a peak of 30A.
• Added onboard NTC100k resistor for measuring chamber temperature.
• Connected ADXL345's INT1 and INT2 to the MCU for specific users' leveling needs.
• Supports high-voltage input limit.
• Includes a 3-meter CAN cable to avoid signal loss issues caused by improper terminal crimping.
• Supports 2/3/4-wire fans.
• Modular design for easy disassembly of the Stealthburner.
• Compatible with Hartk's Stealthburner Toolhead Board (the fan board does not need to be replaced).
• Interfaces: Controllable fans *3, RGB *1, limit switches *3, heater cartridge *1, thermistor *1.

Product Parameters

• Supports switching between Klipper CAN mode, RS232 mode, and RRFCAN mode.
• Connection interface uses XT30 (2+2) connector, supporting 15A current with a peak of 30A.
• MCU: Raspberry Pi RP2040, Dual-core ARM Cortex-M0+ @133MHz.
• Input voltage: DC 12-24V.
• Maximum output current for the heater cartridge: 5A.
• Maximum output current for the fan interface: 1A.

Product Notes

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