Introduction

Product Introduction

FLY SHT36/42 is a hotend tool board designed by Guangzhou Magnesium-Lun Electronic Technology Co., Ltd. for 3D printer extruders. Using this tool board, four wires can replace the complex wiring between the mainboard and the printhead, optimizing the layout. The SHT36 is suitable for 36 stepper motors, and the SHT42 is suitable for 42 stepper motors. It integrates a CAN transceiver, USB port, TMC2209 driver, ADXL345 accelerometer, two controllable fans, and other functions. This tool board is compatible with Klipper firmware.

• Extremely compact size, designed with a 6-layer PCB.
• Supports CAN bus connection for more stable data transmission, lower latency, and more reliable connections.
• Onboard TMC2209 driver, operating in UART mode, suitable for the extruder.
• Onboard ADXL345 accelerometer.
• Supports PT100 (MAX31865).
• Replaceable fan MOSFET design.
• Supports leveling sensors like BLTOUCH and PL08N, integrates XY limit switches.
• Supports 12-24V input voltage.
• MCU: STM32F072
• Communication: CANBUS, USB
• Interfaces: Controllable fan *2, RGB *1, Limit switch *3, Probe *1, Servo *1, Heater cartridge *1, Thermistor *1, PT100 *1

Product Parameters

1. Dimensions: 51.27mm * 36.26mm (SHT36), 42mm * 42mm (SHT42)
2. Mounting Dimensions: Hole spacing 43.84mm, M3 mounting holes.
3. Processor: STM32F072C8T6
4. Input Voltage: DC 12-24V 5A
5. Maximum Heater Cartridge Output Current: 5A
6. Maximum Fan Interface Output Current: 1A

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SHT-36

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SHT-42

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Product Notes

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