Introduction

Product Overview

FLY SHT36 V2 is a hotend toolboard designed by Guangzhou Meilun Electronics Technology Co., Ltd. for 3D printer extruders. With this toolboard, four wires can replace the complicated wiring between the mainboard and the print head, optimizing the layout. SHT36 V2 is suitable for 36 stepper motors and integrates a CAN transceiver, USB port, TMC2209 driver, ADXL345 accelerometer, two controllable fans, and other functional modules. This toolboard is compatible with the Klipper firmware.

• Ultra-compact design with a 6-layer PCB
• Supports CAN bus connection for more stable data transmission, lower latency, and more reliable connections
• Onboard TMC2209 driver using UART mode, suitable for extruders
• Onboard ADXL345 accelerometer
• Supports PT100 (MAX31865)
• Replaceable MOS design for fans
• Supports leveling sensors such as BLTOUCH and PL08N, integrated XY endstops
• Supports 12-24V input voltage
• MCU: STM32F072
• Communication: CAN
• Supports leveling sensors such as BLTOUCH and PL08N, integrated XY endstops

New Features

• Added support for switching between 4.7K resistor (for NTC thermistors) and 1.1K resistor (for PT1000)
• The CAN interface no longer uses MX3.0 terminal; the new connector supports 15A continuous current and up to 30A peak current
• Added selectable fan voltage: 5/12/24V
• Added onboard NTC100K resistor for chamber temperature measurement
• Added reverse polarity protection for power input
• ADXL345's INT1 connected to the MCU for leveling purposes for some users
• Enlarged heating cartridge port with a rated current of 10A
• Added high-voltage input protection
• Replaced the main controller with a domestic MCU
• Supports magnetic encoder (AS5047D), used by Klipper for motion analysis (currently not supported by Klipper)
• Included 1-meter CAN cable to prevent signal loss due to incorrect crimping
• Mounting dimensions: Hole spacing 43.84mm, M3 mounting holes
• Processors: GD32F103 (purchased before October 28, 2022), APM32F072 (purchased after October 28, 2022)

SHT-36 V2

Product Notes

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