: For advanced features like better fan control or refined Z-offset menus, community-optimized versions are available on Printables by Kaot93 3. Format the SD Card
The printer requires a specific format to recognize the update file: Insert the SD card into your computer. Format it as 4096 allocation unit size Ensure the card is empty before proceeding. 4. Flash the Printer Rename the File : Ensure the downloaded firmware is named exactly firmware.bin Sunlu T3 Firmware Update
Once the screen turns on, go to the "About" or "Info" section in the settings menu to confirm the version number has changed. Community Alternatives: Custom Firmware : For advanced features like better fan control
Calibrate the hotend and heated bed temperature stability using the LCD PID menu or via a terminal interface using M303 . Troubleshooting Common Issues ❌ The screen stays black permanently
To prevent old configuration data from corrupting your new firmware settings, you must clear the EEPROM:
: Available on Printables , this build improves bed tramming and filament runout detection.
If something goes wrong, do not panic. Most issues are easily fixed. ❌ The screen stays black permanently