Navigate to Configuration > Restore Defaults , then click Store Settings . This clears out old, conflicting data memory allocations. Option 2: Transitioning to Klipper Firmware
Once the boot screen or main menu appears, navigate to the "About Printer" menu to verify the new firmware version.
Navigate to the printer menu and select Initialize EEPROM or Reset Factory Defaults , then choose Save Settings . This clears out old, conflicting data. Option 2: Upgrading to Custom Marlin Firmware sunlu t3 firmware
Document version: 2.0 – Last updated: 2025-03-01
A (often utilizing an STM32 or GD32 microcontroller). Navigate to Configuration > Restore Defaults , then
// BLTouch (if used) #define BLTOUCH #define AUTO_BED_LEVELING_BILINEAR
Custom firmware occasionally maps the stepper motor directions backward. In Marlin, search for INVERT_X_DIR (or Y/Z/E) in Configuration.h and toggle it from true to false (or vice versa). In Klipper, simply add or remove an exclamation point ! in front of the direction pin (e.g., dir_pin: !PB12 ) in your printer.cfg . Conclusion Navigate to the printer menu and select Initialize
Change menu layouts, enable automatic bed leveling (ABL) probes like BLTouch/CRTouch, and fine-tune your maximum temperature limits. Understanding the Sunlu T3 Hardware
Copy the downloaded .bin file directly to the root directory of the card. Rename it to something unique like firmware_v1.bin (the printer will not flash a file with the exact same name as the previously installed firmware). Turn off the printer. Insert the MicroSD card into the printer's slot.
Rename the file to something simple and unique, such as firmware_t3_v1.bin . Many 3D printer bootloaders will refuse to flash a file with the exact same name as the previously installed firmware. Flash the Board: Power off the Sunlu T3. Insert the SD card into the printer's slot. Power on the printer.
Download and install the PlatformIO and Marlin Auto Build extensions.