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 and following a safe installation process to avoid "bricking" your printer.
: Stock firmware sometimes struggles with creating accurate bed meshes. Custom versions like Kaot93’s Marlin 2.1.2 increase leveling points to a 5x5 grid , providing much better first-layer adhesion. sunlu t3 firmware update better
Stock firmware incorrectly maps the extruder cooling fan to the controller board fan pin. This means the hotend fan only spins when motors are active, risking heat creep and clogs during preheating. Updated configurations ensure the fan runs whenever the hotend is hot. Updating the firmware on your Sunlu T3 (or
The T3’s inductive probe is great, but the stock firmware’s mesh leveling is sluggish and forgetful. Custom versions like Kaot93’s Marlin 2
: Use a small, FAT32-formatted microSD card.
Better optimization of the TMC2209 drivers for near-silent operation.