. The T3 uses a 32-bit controller board (similar to a BTT SKR Mini E3 V2 clone), which supports simple SD card flashing Update Instructions Prepare the SD Card
: For users who want to compile their own, Anson Liu provides a Marlin 2.0 configuration that fixes bugs like the extruder cooling fan being misassigned.
You can obtain the firmware from official or community sources: Official Website : Download the latest Sunlu T3 32-bit Firmware (e.g., version 3.40 or newer) from the Official Sunlu Download Page Community/Custom
Activates advanced thermal runaway protection to prevent fire hazards if a thermistor fails.
Resolves common stock issues such as random print pauses or media read errors from the SD card. Prerequisites: What You Need Before Starting Sunlu T3 Firmware Update
Updates often refine the 16-point matrix leveling system for a more accurate first layer.
Fixes known bugs related to the filament break sensor and clog detection algorithms.
: Newer versions often include improved PID tuning for both the bed and hotend to maintain stable temperatures.
Enable #define LIN_ADVANCE and #define INDUCTION_PROBE if you are utilizing the T3's auto-leveling sensor. Hit in PlatformIO to generate the firmware.bin file. Step 3: Flashing the Firmware Clear all files from your MicroSD card. Resolves common stock issues such as random print
If you can provide the current firmware version your Sunlu T3 is running, I can help you determine if a specific update is necessary.
The Sunlu T3 advertises speeds up to 250mm/s. The stock firmware, however, often suffers from poor acceleration control, leading to severe ghosting and ringing at high speeds. Updated Marlin or Klipper firmware utilizes advanced algorithms to stabilize the print head during sudden directional changes.
Note: Make a note of the chip architecture, as Marlin environments require specific environment builds for GD32 vs. STM32 chips.
Updates often include better UI navigation on the screen or improved leveling routines. Prerequisites: Preparing for the Firmware Update : Newer versions often include improved PID tuning
You can choose between official stock firmware or community-modified versions depending on your needs:
Extract the downloaded firmware file and copy the .bin firmware file directly onto the root of the microSD card. Do not put it inside any folders.
Choose as the file system and 4096 bytes allocation unit size.
Based on Marlin 2.1.2, this firmware is known for its stability. It is available on Printables . Note: Users have reported that this specific version may not support USB connection , relying entirely on SD card printing.