Sunlu T3 Firmware

The firmware expects a simple on/off switch, but the T3 sensor reads a rolling wheel. Switch your firmware settings from "Standard Runout" to "Motion Sensor".

| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Homing fails, probe does not deploy | Wrong probe type in firmware | Recompile with Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN disabled | | Touchscreen shows no response | Firmware mismatch between mainboard and screen | Flash both mainboard and DWIN firmware | | "TMC CONNECTION ERROR" | UART pins not configured | Update to post-2023 firmware, or manually define in Configuration_adv.h | | Thermal runaway after 10 min | PID values incorrect | Run M303 E0 C8 S210 U1 , then M500 | | Extruder steps/mm wrong (default 140?) | Old firmware used 400 steps | Set M92 E140 (for T3’s standard extruder gear ratio) | sunlu t3 firmware

Download the specific .bin file designated for the Sunlu T3. The firmware expects a simple on/off switch, but

// Thermistor #define TEMP_SENSOR_0 1 // 100k NTC // Thermistor #define TEMP_SENSOR_0 1 // 100k NTC

The stock firmware that ships with the Sunlu T3 is functional but basic. It often lacks:

If you need help tailoring this firmware setup to your specific printing goals, please let me know:

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