The motherboard is very picky about how the file is read.
: It is highly recommended to "Restore Defaults" and "Store Settings" (Save to EEPROM) in the printer's configuration menu to ensure no old settings conflict with the new firmware. Additional resources for Sunlu T3 users Official Support Community Firmware Calibration Downloads & Documentation Sunlu Official Facebook Support Sunlu T3 Firmware Update
: Updates can unlock Linear Advance , S-curve acceleration, and more precise 5x5 Auto Bed Leveling (ABL) . The motherboard is very picky about how the file is read
The Sunlu 3D Printer User Group on Facebook is very active. The community moderators often pin the latest firmware files for the T3, S8, and S9 in the "Files" section or "Announcements." The Sunlu 3D Printer User Group on Facebook is very active
– A simple 20mm calibration cube is perfect.
You cannot successfully perform a Sunlu T3 firmware update without knowing exactly which motherboard and screen you have. Sunlu has produced multiple revisions of the T3.