MarlinFirmware · vovodroid · Dec 2, 2024 · Feb 5, 2026 · Feb 5, 2026 · Feb 5, 2026
diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
@@ -707,6 +707,9 @@
 #define E5_AUTO_FAN_PIN -1
 #define E6_AUTO_FAN_PIN -1
 #define E7_AUTO_FAN_PIN -1
+
+//#define EDITABLE_AUTO_FAN_SPEED   // Add G-code and menu items to modify Extruder Auto Fan Speeds
+
 #define CHAMBER_AUTO_FAN_PIN -1
 #define COOLER_AUTO_FAN_PIN -1
 

diff --git a/Marlin/src/inc/Conditionals-5-post.h b/Marlin/src/inc/Conditionals-5-post.h
@@ -2853,6 +2853,7 @@
   #undef COOLER_AUTO_FAN_TEMPERATURE
 #endif
 #if !HAS_E_AUTO_FAN
+  #undef EDITABLE_AUTO_FAN_SPEED
   #undef EXTRUDER_AUTO_FAN_SPEED
   #undef EXTRUDER_AUTO_FAN_TEMPERATURE
 #endif

diff --git a/Marlin/src/lcd/language/language_en.h b/Marlin/src/lcd/language/language_en.h
@@ -390,6 +390,8 @@ namespace LanguageNarrow_en {
   LSTR MSG_STORED_FAN_N                   = _UxGT("Stored Fan ~");
   LSTR MSG_EXTRA_FAN_SPEED                = _UxGT("Extra Fan Speed");
   LSTR MSG_EXTRA_FAN_SPEED_N              = _UxGT("Extra Fan Speed ~");
+  LSTR MSG_FANS                           = _UxGT("Fans");
+  LSTR MSG_EXTRUDER_AUTO_FAN_SPEED        = _UxGT("Extruder fan speed");
   LSTR MSG_PID_AUTOTUNE                   = _UxGT("PID Autotune");
   LSTR MSG_PID_AUTOTUNE_E                 = _UxGT("Autotune * PID");
   LSTR MSG_JERK                           = _UxGT("Jerk");

diff --git a/Marlin/src/lcd/menu/menu_configuration.cpp b/Marlin/src/lcd/menu/menu_configuration.cpp
@@ -350,19 +350,24 @@ void menu_advanced_settings();
 
 #endif
 
-#if ENABLED(CONTROLLER_FAN_MENU)
+#if ANY(CONTROLLER_FAN_MENU, EDITABLE_AUTO_FAN_SPEED)
 
   #include "../../feature/controllerfan.h"
 
-  void menu_controller_fan() {
+  void menu_fans() {
     START_MENU();
     BACK_ITEM(MSG_CONFIGURATION);
-    EDIT_ITEM_FAST(percent, MSG_CONTROLLER_FAN_IDLE_SPEED, &controllerFan.settings.idle_speed, CONTROLLERFAN_SPEED_MIN, 255);
-    EDIT_ITEM(bool, MSG_CONTROLLER_FAN_AUTO_ON, &controllerFan.settings.auto_mode);
-    if (controllerFan.settings.auto_mode) {
-      EDIT_ITEM_FAST(percent, MSG_CONTROLLER_FAN_SPEED, &controllerFan.settings.active_speed, CONTROLLERFAN_SPEED_MIN, 255);
-      EDIT_ITEM(uint16_4, MSG_CONTROLLER_FAN_DURATION, &controllerFan.settings.duration, 0, 4800);
-    }
+    #if ENABLED(CONTROLLER_FAN_MENU)
+      EDIT_ITEM_FAST(percent, MSG_CONTROLLER_FAN_IDLE_SPEED, &controllerFan.settings.idle_speed, CONTROLLERFAN_SPEED_MIN, 255);
+      EDIT_ITEM(bool, MSG_CONTROLLER_FAN_AUTO_ON, &controllerFan.settings.auto_mode);
+      if (controllerFan.settings.auto_mode) {
+        EDIT_ITEM_FAST(percent, MSG_CONTROLLER_FAN_SPEED, &controllerFan.settings.active_speed, CONTROLLERFAN_SPEED_MIN, 255);
+        EDIT_ITEM(uint16_4, MSG_CONTROLLER_FAN_DURATION, &controllerFan.settings.duration, 0, 4800);
+      }
+    #endif
+    #if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+      EDIT_ITEM_FAST(percent, MSG_EXTRUDER_AUTO_FAN_SPEED, &thermalManager.extruder_fan_speed, 0, 255);
+    #endif
     END_MENU();
   }
 
@@ -595,8 +600,8 @@ void menu_configuration() {
   //
   // Set Fan Controller speed
   //
-  #if ENABLED(CONTROLLER_FAN_MENU)
-    SUBMENU(MSG_CONTROLLER_FAN, menu_controller_fan);
+  #if ANY(CONTROLLER_FAN_MENU, EXTRUDER_AUTO_FAN_SPEED_MENU)
+    SUBMENU(MSG_FANS, menu_fans);
   #endif
 
   if (!busy) {

diff --git a/Marlin/src/module/settings.cpp b/Marlin/src/module/settings.cpp
@@ -36,7 +36,7 @@
  */
 
 // Change EEPROM version if the structure changes
-#define EEPROM_VERSION "V90"
+#define EEPROM_VERSION "V91"
 #define EEPROM_OFFSET 100
 
 // Check the integrity of data offsets.
@@ -452,6 +452,13 @@ typedef struct SettingsDataStruct {
   //
   controllerFan_settings_t controllerFan_settings;      // M710
 
+  //
+  // Extruder fan settings
+  //
+  #if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+    uint8_t extruder_fan_speed;
+  #endif
+
   //
   // POWER_LOSS_RECOVERY
   //
@@ -1356,6 +1363,16 @@ void MarlinSettings::postprocess() {
       EEPROM_WRITE(cfs);
     }
 
+    //
+    // Extruder fan
+    //
+    #if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+    {
+      _FIELD_TEST(extruder_fan_speed);
+      EEPROM_WRITE(thermalManager.extruder_fan_speed);
+    }
+    #endif
+
     //
     // Power-Loss Recovery
     //
@@ -2445,6 +2462,18 @@ void MarlinSettings::postprocess() {
         TERN_(CONTROLLER_FAN_EDITABLE, if (!validating) controllerFan.settings = cfs);
       }
 
+      //
+      // Extruder Fan
+      //
+      #if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+      {
+        _FIELD_TEST(extruder_fan_speed);
+        uint8_t efs;
+        EEPROM_READ(efs);
+        if (!validating) thermalManager.extruder_fan_speed = efs;
+      }
+      #endif
+
       //
       // Power-Loss Recovery
       //
@@ -3584,6 +3613,11 @@ void MarlinSettings::reset() {
   //
   TERN_(USE_CONTROLLER_FAN, controllerFan.reset());
 
+  //
+  // Extruder Fan
+  //
+  TERN_(EDITABLE_AUTO_FAN_SPEED, thermalManager.extruder_fan_speed = EXTRUDER_AUTO_FAN_SPEED);
+
   //
   // Power-Loss Recovery
   //

diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
@@ -402,6 +402,12 @@ PGMSTR(str_t_heating_failed, STR_T_HEATING_FAILED);
   uint8_t Temperature::autofan_speed[HOTENDS] = ARRAY_N_1(HOTENDS, FAN_OFF_PWM);
 #endif
 
+#if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+  uint8_t Temperature::extruder_fan_speed;  // Initialized by settings.load
+#elif HAS_E_AUTO_FAN
+  constexpr uint8_t Temperature::extruder_fan_speed;
+#endif
+
 #if ENABLED(AUTO_POWER_CHAMBER_FAN)
   uint8_t Temperature::chamberfan_speed = FAN_OFF_PWM;
 #endif
@@ -1492,7 +1498,7 @@ int16_t Temperature::getHeaterPower(const heater_id_t heater_id) {
     #endif
 
     #define _UPDATE_AUTO_FAN(P,D,A) do{                   \
-      if (PWM_PIN(P##_AUTO_FAN_PIN) && A < 255)           \
+      if (PWM_PIN(P##_AUTO_FAN_PIN))                      \
         hal.set_pwm_duty(pin_t(P##_AUTO_FAN_PIN), D ? A : 0); \
       else                                                \
         WRITE(P##_AUTO_FAN_PIN, D);                       \
@@ -1516,15 +1522,15 @@ int16_t Temperature::getHeaterPower(const heater_id_t heater_id) {
         #endif
         default:
           #if ANY(AUTO_POWER_E_FANS, HAS_FANCHECK)
-            autofan_speed[realFan] = fan_on ? EXTRUDER_AUTO_FAN_SPEED : 0;
+            autofan_speed[realFan] = fan_on ? extruder_fan_speed : 0;
           #endif
           break;
       }
 
       #if ALL(HAS_FANCHECK, HAS_PWMFANCHECK)
-        #define _AUTOFAN_SPEED() fan_check.is_measuring() ? 255 : EXTRUDER_AUTO_FAN_SPEED
+        #define _AUTOFAN_SPEED() fan_check.is_measuring() ? 255 : extruder_fan_speed
       #else
-        #define _AUTOFAN_SPEED() EXTRUDER_AUTO_FAN_SPEED
+        #define _AUTOFAN_SPEED() extruder_fan_speed
       #endif
       #define _AUTOFAN_CASE(N) case N: _UPDATE_AUTO_FAN(E##N, fan_on, _AUTOFAN_SPEED()); break;
       #define _AUTOFAN_NOT(N)

diff --git a/Marlin/src/module/temperature.h b/Marlin/src/module/temperature.h
@@ -673,6 +673,13 @@ class Temperature {
     #if ANY(AUTO_POWER_E_FANS, HAS_FANCHECK)
       static uint8_t autofan_speed[HOTENDS];
     #endif
+
+    #if ENABLED(EDITABLE_AUTO_FAN_SPEED)
+      static uint8_t extruder_fan_speed;
+    #elif HAS_E_AUTO_FAN
+      static constexpr uint8_t extruder_fan_speed = EXTRUDER_AUTO_FAN_SPEED;
+    #endif
+
     #if ENABLED(AUTO_POWER_CHAMBER_FAN)
       static uint8_t chamberfan_speed;
     #endif

diff --git a/buildroot/tests/DUE b/buildroot/tests/DUE
@@ -30,7 +30,7 @@ opt_enable S_CURVE_ACCELERATION FREEZE_FEATURE SOFT_FEED_HOLD EEPROM_SETTINGS GC
            PSU_CONTROL AUTO_POWER_CONTROL E_DUAL_STEPPER_DRIVERS \
            PIDTEMPBED SLOW_PWM_HEATERS THERMAL_PROTECTION_CHAMBER \
            PINS_DEBUGGING MAX7219_DEBUG M114_DETAIL MAX7219_REINIT_ON_POWERUP \
-           EXTENSIBLE_UI
+           EXTENSIBLE_UI EDITABLE_AUTO_FAN_SPEED
 opt_add EXTUI_EXAMPLE
 exec_test $1 $2 "RAMPS4DUE_EFB with ABL (Bilinear), ExtUI, S-Curve, many options." "$3"