Updating the firmware on your Sunlu T3 (or T3S) is one of the most effective ways to fix common issues like inconsistent extrusion, temperature fluctuations, or connectivity bugs. However, the "better" way to do it involves ensuring you have the right version and following a safe installation process to avoid "bricking" your printer.
Check that the UI version reflects the new update. sunlu t3 firmware update better
The Sunlu T3: A Brief Overview
Sunlu listened. The V2.0.x and later firmware updates (specifically builds based on Marlin 2.1.x) address three critical pillars of printing: Safety, Precision, and User Experience. Updating the firmware on your Sunlu T3 (or
The Flash Process: Insert the card into the powered-off printer. Turn the printer on. The screen may stay blank for 10–30 seconds—do not turn it off. Official Sunlu Download Center – Firmware, Cura profiles,
Verify the Update: After the update is complete, verify that the new firmware version is running correctly. You may need to restart the printer.