Here’s a draft for a forum or Reddit-style post about Sunlu T3 firmware. You can adjust the tone depending on where you’re posting (e.g., r/3Dprinting, Sunlu community, Facebook group).
How it works: By toggling "Fast Print" in the menu, the firmware increases acceleration to levels typically found on high-end modified printers, allowing the motors to reach their top speeds much faster.
Edit your configuration in VSCode using the Auto Build Marlin plugin. Place the resulting .bin file onto a formatted SD card. sunlu t3 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 |
If you can't find a pre-built file, compiling your own Marlin is the ultimate solution. It is easier than you think. Here’s a draft for a forum or Reddit-style
Because the T3 is an Ender 3 V2 clone, the open-source community has adopted it. If you need modern features, custom firmware is superior to stock.
Users found that the original firmware mismanaged the cooling fans; the extruder fan only activated when motors were moving, rather than when the hotend was hot, potentially causing heat creep. It also lacked PID temperature support for the bed. Community & Custom Firmware Alternatives Proper bed mesh leveling (no more manual paper tests)
Instead of relying on outdated factory files, many users opt for community-verified Marlin configurations.