Sunlu - T3 Firmware Update

exactly. If you have updated before, ensure the name is different from the previous update (e.g., firmware_v2.bin ) as the board may ignore a filename it has already "seen". Copy to SD Card file in the root directory (not inside any folders) of your formatted Micro SD card. Flash the Printer the printer. Unplug any USB cables connected to the printer.

The Sunlu T3, like many printers based on Ender 3 architectures, often requires a two-part update: the mainboard and the display screen. 1. Updating the Mainboard Firmware

Note: Use the method your board and firmware require. SD/USB are the most common.

Adds new features or refines the user interface (UI) for a better user experience. Sunlu T3 Firmware Update

If you are using Arduino IDE:

Fixes known bugs related to resume-print functions and filament runout sensors. Prerequisites: What You Need Before Starting

Complete Guide to the Sunlu T3 Firmware Update: Unlock Better Performance and Features exactly

A MicroSD card (8GB or 16GB is ideal, formatted to with a 4096-byte allocation size ).

Your Sunlu T3 uses a 32-bit mainboard and runs a modified version of the open-source Marlin 2.0 firmware. Understanding that your printer is based on this robust software helps you diagnose any issues that might arise.

This feature allows for rapid prototyping by overriding standard G-code settings directly through the printer's interface. Flash the Printer the printer

Are you looking to stick with standard or make the jump to Klipper ?

Early batches of the Sunlu T3 ran on Marlin 2.0.x branches that contained minor bugs, such as inaccurate bed leveling mesh recall or LCD lag. Sunlu periodically releases patches that make the machine more stable during long prints (24+ hours).

If you want to tailor your update process further, let me know: