Configure extruder fan speed

Author: vovodroid

Marlin/src/lcd/menu/menu_configuration.cpp

@@ -354,6 +354,9 @@ void menu_advanced_settings();
 
   #include "../../feature/controllerfan.h"
 
+namespace LanguageNarrow_en {
+  static LSTR MSG_E_FAN = _UxGT("Extruder fan speed");
+}
   void menu_controller_fan() {
     START_MENU();
     BACK_ITEM(MSG_CONFIGURATION);
@@ -363,6 +366,7 @@ void menu_advanced_settings();
       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);
     }
+    EDIT_ITEM_FAST(percent, MSG_E_FAN, &Temperature::extruder_fan_speed, 0, 255);
     END_MENU();
   }
 

Marlin/src/module/temperature.cpp

@@ -398,6 +398,10 @@ PGMSTR(str_t_heating_failed, STR_T_HEATING_FAILED);
   uint8_t Temperature::autofan_speed[HOTENDS] = ARRAY_N_1(HOTENDS, FAN_OFF_PWM);
 #endif
 
+#if HAS_E_AUTO_FAN
+  uint8_t Temperature::extruder_fan_speed = EXTRUDER_AUTO_FAN_SPEED;
+#endif
+
 #if ENABLED(AUTO_POWER_CHAMBER_FAN)
   uint8_t Temperature::chamberfan_speed = FAN_OFF_PWM;
 #endif
@@ -1439,7 +1443,7 @@ 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);                       \
@@ -1471,7 +1475,7 @@ int16_t Temperature::getHeaterPower(const heater_id_t heater_id) {
       #if ALL(HAS_FANCHECK, HAS_PWMFANCHECK)
         #define _AUTOFAN_SPEED() fan_check.is_measuring() ? 255 : EXTRUDER_AUTO_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)

Marlin/src/module/temperature.h

@@ -634,6 +634,11 @@ class Temperature {
     #if ANY(AUTO_POWER_E_FANS, HAS_FANCHECK)
       static uint8_t autofan_speed[HOTENDS];
     #endif
+
+    #if HAS_E_AUTO_FAN
+      static uint8_t extruder_fan_speed;
+    #endif
+
     #if ENABLED(AUTO_POWER_CHAMBER_FAN)
       static uint8_t chamberfan_speed;
     #endif