The SB2040 board design was inspired by hartk1213; thanks for his contribution to the Voron community, which can be found at: https://github.com/hartk1213/MISC/tree/main/PCBs/Stealthburner_Toolhead_PCB# stealthburner-toolhead-board

The SB2040 V3 board utilises CAN/RS232 communication to connect the upper computer to the UTOC/UTOR board, enabling communication with the SB2040 through the UTOC/UTOR.

For the SB2040 board, it is recommended to choose the FLY-UTOC-1 Board because connecting most of the upper computer and the main board via USB is enough, so there is no need to use Can communication.

Reference URL:

Kliiper refers to this URL:

https://mellow.klipper.cn/#/board/fly_sb2040_v3_pro/README

RRF refers to this URL: http://teamgloomy.github.io/fly_sb2040_max_v3_general.html https://teamgloomy.github.io/fly_sb2040_pro_max_v3_general.html

Product Features

Supports CAN bus connection for stable data transmission with minimal latency and longer distances.
CAN bus is compatible with all devices capable of running Linux, such as Raspberry Pi.
Added support for RS232 connection, offering even more stable data transmission with minimal latency and longer distances, reducing disconnections.
Onboard TMC2209/TMC2240 drivers for extruders.
Integrated LIS2DW accelerometer.
Added support for switching between 4.7K resistors (for NTC thermistors) or 1K resistors (for PT1000 sensors).
Replaced MX3.0 terminals with new connectors supporting 15A current, peaking at 30A.
LIS2DW’s INT1 and INT2 pins are connected to the microcontroller for user-level calibration.
Rated 5A heating rod port.
High voltage input limitations.
Upgraded to a 3m CAN connection cable to prevent signal loss due to improper terminal crimping.
Added support for MAX31865 version, originally only supporting PT100 sensors, now also supporting PT1000 sensors for higher requirements.
Added 8-bit DIP switch for easier configuration without needing jumpers or soldering.
Added two switches for toggling between RRF and Klipper CAN, Klipper CAN and RS232.
Added fan board switch for toggling between DC and PWM fans, enhancing customer convenience.
Added CAN interface for customer expansion with CAN modules.
Max version adds 1612 chip for RRF fast scanning