No more compiling .bin files. You can change printer settings instantly by editing a simple printer.cfg text file via a web browser interface (Fluidd or Mainsail).
Ensure the card is 32GB or smaller, formatted strictly to FAT32, and that the file ends in .bin .
Set your travel limits to X_BED_SIZE 220 and Y_BED_SIZE 220 (Z height is 250mm).
Do you have a like a Raspberry Pi available? sunlu t3 firmware
If you bought the Sunlu T3 for its high-speed advertising, is the ultimate firmware upgrade. Unlike Marlin, which processes everything on the printer’s 32-bit chip, Klipper offloads heavy mathematical computations to a secondary computer (like a Raspberry Pi, Sonic Pad, or an old laptop) running Linux. Why Klipper Changes the Game for the T3:
Because the T3 is mechanically an Ender-3, you can compile Marlin 2.1.x from source. You need Visual Studio Code with PlatformIO.
Use a high-quality SD card (8GB or 16GB is ideal). Format it to FAT32 with a 4096-byte allocation size . No more compiling
Whether you are looking to fix bugs, unlock advanced features like Linear Advance, or convert your machine to Klipper, upgrading your Sunlu T3 firmware is the single best way to maximize your printer's potential. Why Upgrade Your Sunlu T3 Firmware?
The Sunlu T3 is marketed to print up to 250mm/s. Stock firmware often causes artifacts or under-extrusion at these speeds. Custom firmware optimizes acceleration and jerk control.
If your X, Y, or Z axis moves the wrong way after a Marlin flash, you must invert the stepper direction settings in your configuration file and recompile, or switch the wire polarity. Conclusion Set your travel limits to X_BED_SIZE 220 and
Resumes printing after a sudden power failure.
After the update, it is important to perform a fresh and recalibrate your Z-Offset , as these settings are often stored in the firmware and may be reset during the update.