Sunlu T3 Firmware Update !new! (RECENT)

Updating the firmware on a Sunlu T3 (also known as the "Terminator 3") is often a necessary step for enthusiasts because the stock firmware has several known limitations, including fan mapping errors and disabled PID tuning for the bed. The T3 is essentially a modified Ender 3 clone using a 32-bit board similar to the BTT SKR Mini E3 V2. Available Firmware Options

A FAT32-formatted microSD card (ideally 8GB or smaller for better compatibility). The correct firmware file, usually named firmware.bin. Official vs. Custom Firmware Options You have two primary paths when updating your T3: 1. Official Sunlu Firmware Custom Firmware for SUNLU T3 by Kaot93 - Printables.com

Part 5: Post-Update Configuration (The Most Overlooked Step)

You updated the firmware, congratulations. But your printer is now running on "default" math. You must calibrate it again.

4. Flash the LCD firmware (if needed)

• Use a separate microSD card. Copy the CSTM or DWIN_SET folder to the root.
• Insert the card into the LCD’s microSD slot (inside the front panel – often behind a sticker or on the side of the touchscreen board).
• Power on the printer. The screen will show “Updating…” then reboot automatically.
• Remove the card after completion.

If you want to compile your own:

1. Verify the firmware version: Check the printer's control panel to ensure that the firmware version has been updated correctly.
2. Calibrate the printer: Perform a calibration routine to ensure that the printer is accurately configured.
3. Test print: Run a test print to verify that the printer is functioning correctly.