Chamber Fan mode 3 (#21594)

MarlinFirmware · Apr 13, 2021 · 7f56538 · 7f56538
1 parent 4044ed8
commit 7f56538
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
@@ -163,7 +163,7 @@
 
   //#define CHAMBER_FAN               // Enable a fan on the chamber
   #if ENABLED(CHAMBER_FAN)
-    #define CHAMBER_FAN_MODE 2        // Fan control mode: 0=Static; 1=Linear increase when temp is higher than target; 2=V-shaped curve.
+    #define CHAMBER_FAN_MODE 2        // Fan control mode: 0=Static; 1=Linear increase when temp is higher than target; 2=V-shaped curve; 3=similar to 1 but fan is always on.
     #if CHAMBER_FAN_MODE == 0
       #define CHAMBER_FAN_BASE  255   // Chamber fan PWM (0-255)
     #elif CHAMBER_FAN_MODE == 1
@@ -172,6 +172,9 @@
     #elif CHAMBER_FAN_MODE == 2
       #define CHAMBER_FAN_BASE  128   // Minimum chamber fan PWM (0-255)
       #define CHAMBER_FAN_FACTOR 25   // PWM increase per °C difference from target
+    #elif CHAMBER_FAN_MODE == 3
+      #define CHAMBER_FAN_BASE  128   // Base chamber fan PWM (0-255)
+      #define CHAMBER_FAN_FACTOR 25   // PWM increase per °C above target
     #endif
   #endif
 

diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
@@ -1406,6 +1406,8 @@ void Temperature::manage_heater() {
             fan_chamber_pwm = (CHAMBER_FAN_BASE) + (CHAMBER_FAN_FACTOR) * ABS(temp_chamber.celsius - temp_chamber.target);
             if (temp_chamber.soft_pwm_amount)
               fan_chamber_pwm += (CHAMBER_FAN_FACTOR) * 2;
+          #elif CHAMBER_FAN_MODE == 3
+            fan_chamber_pwm = CHAMBER_FAN_BASE + _MAX((CHAMBER_FAN_FACTOR) * (temp_chamber.celsius - temp_chamber.target), 0);
           #endif
           NOMORE(fan_chamber_pwm, 225);
           set_fan_speed(2, fan_chamber_pwm); // TODO: instead of fan 2, set to chamber fan