Sunlu: T3 Firmware Update

(Terminator) 3D printer. The Sunlu T3 is equipped with a 32-bit motherboard, typically a modified version of the BigTreeTech SKR Mini E3 V2 Update Overview

Sometimes a firmware update changes the default offsets for the leveling probe.

Turn on the printer. The screen may remain blank for 10–30 seconds while the update installs. Sunlu T3 Firmware Update

Resetting the EEPROM clears out old data cache from the previous firmware, preventing strange behavioral bugs. Troubleshooting Common Update Failures

Downloaded directly from the official Sunlu website or verified community repositories (like GitHub if you are flashing custom Marlin or Klipper). Step-by-Step Guide to Updating Sunlu T3 Firmware (Terminator) 3D printer

Calibrate the hotend and heated bed temperature stability using the LCD PID menu or via a terminal interface using M303 . Troubleshooting Common Issues

: Expands the Automatic Bed Leveling (ABL) to a more precise 5x5 grid. The screen may remain blank for 10–30 seconds

John's curiosity was piqued, and he quickly logged into his Sunlu account to learn more about the update. After reading through the changelog, he decided it was worth updating. He downloaded the firmware file and prepared his T3 for the update.

If your firmware update didn't go smoothly, don't panic. Mainboards are rarely permanently bricked by an SD card flash.

The effort pays off: Klipper can smooth out the T3’s motion, reduce ringing, and let you print reliably at higher speeds.

Once completed, the standard user interface home screen will load. Step 4: Reset EEPROM