Sunlu T3 Firmware [patched] <2025-2027>

Configured for TMC2209 drivers to maintain quiet operation (approx. 45 dB).

Updating your Sunlu T3 firmware is the single fastest way to improve print quality without buying new hardware.

Compile the firmware using the make command, transfer the resulting Klipper .bin file to an SD card, and flash your T3 motherboard.

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The Sunlu T3 is a popular and highly-regarded 3D printer known for its exceptional print quality, reliability, and affordability. However, like any 3D printer, its performance can be further enhanced and customized through firmware updates. In this article, we will explore the world of Sunlu T3 firmware, covering everything from the basics of firmware and its importance to the benefits of updating, and a step-by-step guide on how to upgrade your Sunlu T3 firmware.

The Sunlu T3 uses a customized version of the open-source Marlin firmware. The firmware is specifically designed to work with the printer's hardware configuration, providing optimal performance and reliability. The Sunlu T3 firmware is regularly updated to address issues, improve performance, and add new features.

If using Marlin, ensure the runout sensor logic is set to HIGH or LOW depending on the sensor type. In Klipper, you may need to configure it as a simple filament_switch_sensor or utilize specific macros to handle the optical wheel data inside the Sunlu sensor. Conclusion Configured for TMC2209 drivers to maintain quiet operation

This configuration is officially included in the MarlinFirmware/Configurations repository on GitHub, making it a reliable and accessible option for those familiar with compiling Marlin.

Have you checked your or main chip type yet?

, BLTouch assisted bed tramming, and higher hotend temperature limits. Marlin 2.1.x Bugfix Compile the firmware using the make command, transfer

Option 2: Custom Marlin Firmware (Recommended for Most Users)

Official firmware rarely supports BLTouch or filament runout sensors unless you bought a specific "T3 Pro" bundle.

Locate the compiled firmware.bin file in the .pio/build directory and flash it using the SD card method detailed above. Option 3: Supercharging with Klipper Firmware

| Version | Date | Changes | |---------|------------|---------| | V1.0.0 | 2022-03 | Initial release (buggy ABL) | | V1.1.8 | 2022-09 | Improved bed leveling, added PID autotune menu | | V1.2.5 | 2023-02 | Fixed TMC UART errors, added M600 (filament change) | | V1.3.0 | 2023-12 | Thermal runaway sensitivity adjusted, English labels fixed |

The bootloader did not recognize or accept the file.