Download your chosen custom Marlin .bin file from a trusted community repository (such as GitHub).
Incorrect pin assignment or inverted logic for the Z-homing probe.
Navigate to the printer screen menu: > Advanced Settings . Select Load Factory Defaults (or Reset EEPROM). Select Store Settings to save the clean slate. Sunlu T3 Firmware Update
Which or chip is currently inside your T3?
Refined algorithms improve the auto-bed leveling system for a more precise first layer. Preparation and Prerequisites Download your chosen custom Marlin
Use a small capacity card (usually 8GB or less) and ensure it is formatted to FAT32 . The Firmware File: Download the latest official firmware.
you are trying to fix with this update (e.g., bed leveling, thermal runaway, screen freeze)? Select Load Factory Defaults (or Reset EEPROM)
Insert your microSD card into your computer and format it to FAT32 . Ensure it is completely empty.
Updates often include tweaks to thermal protection protocols. Prerequisites: What You Need Before updating, gather the necessary tools: Sunlu T3 Printer
Go to product viewer dialog for this item. Firmware Update: A Comprehensive Guide to Boosting Your Printer's Performance