Add EXTRA_FAN_SPEED feature

Based on #7883 by @studiodyne

Marlin/Configuration_adv.h

@@ -825,6 +825,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/Marlin.cpp

@@ -165,6 +165,10 @@ bool axis_homed[XYZ] = { false }, axis_known_position[XYZ] = { false };
 
 #if FAN_COUNT > 0
   int16_t fanSpeeds[FAN_COUNT] = { 0 };
+  #if ENABLED(EXTRA_FAN_SPEEDS)
+    int16_t old_fanSpeeds[FAN_COUNT],
+            new_fanSpeeds[FAN_COUNT];
+  #endif
   #if ENABLED(PROBING_FANS_OFF)
     bool fans_paused = false;
     int16_t paused_fanSpeeds[FAN_COUNT] = { 0 };

Marlin/src/Marlin.h

@@ -198,6 +198,10 @@ extern millis_t max_inactive_time, stepper_inactive_time;
 
 #if FAN_COUNT > 0
   extern int16_t fanSpeeds[FAN_COUNT];
+  #if ENABLED(EXTRA_FAN_SPEEDS)
+    extern int16_t old_fanSpeeds[FAN_COUNT],
+                   new_fanSpeeds[FAN_COUNT];
+  #endif
   #if ENABLED(PROBING_FANS_OFF)
     extern bool fans_paused;
     extern int16_t paused_fanSpeeds[FAN_COUNT];

Marlin/src/config/default/Configuration_adv.h

@@ -825,6 +825,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Anet/A6/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Anet/A8/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/BQ/Hephestos/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -821,6 +821,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/BQ/WITBOX/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Cartesio/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Creality/CR-10/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Felix/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Folger Tech/i3-2020/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Infitary/i3-M508/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Malyan/M150/Configuration_adv.h

@@ -821,6 +821,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h

@@ -845,6 +845,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/RigidBot/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/SCARA/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Sanguinololu/Configuration_adv.h

@@ -813,6 +813,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/TinyBoy2/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Velleman/K8200/Configuration_adv.h

@@ -834,6 +834,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/Velleman/K8400/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

@@ -826,6 +826,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

@@ -826,6 +826,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/generic/Configuration_adv.h

@@ -826,6 +826,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/kossel_mini/Configuration_adv.h

@@ -826,6 +826,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/kossel_pro/Configuration_adv.h

@@ -831,6 +831,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/delta/kossel_xl/Configuration_adv.h

@@ -826,6 +826,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/makibox/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/tvrrug/Round2/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/config/examples/wt150/Configuration_adv.h

@@ -824,6 +824,15 @@
   #define RETRACT_RECOVER_FEEDRATE_SWAP 8 // Default feedrate for recovering from swap retraction (mm/s)
 #endif
 
+/**
+ * Extra Fan Speed
+ * Adds a secondary fan speed for each print-cooling fan.
+ *   'M106 P<fan> T3-255' : Set a secondary speed for <fan>
+ *   'M106 P<fan> T2'     : Use the set secondary speed
+ *   'M106 P<fan> T1'     : Restore the previous fan speed
+ */
+//#define EXTRA_FAN_SPEED
+
 /**
  * Advanced Pause
  * Experimental feature for filament change support and for parking the nozzle when paused.

Marlin/src/gcode/gcode.h

@@ -113,8 +113,8 @@
  * M100 - Watch Free Memory (for debugging) (Requires M100_FREE_MEMORY_WATCHER)
  * M104 - Set extruder target temp.
  * M105 - Report current temperatures.
- * M106 - Fan on.
- * M107 - Fan off.
+ * M106 - Set print fan speed.
+ * M107 - Print fan off.
  * M108 - Break out of heating loops (M109, M190, M303). With no controller, breaks out of M0/M1. (Requires EMERGENCY_PARSER)
  * M109 - Sxxx Wait for extruder current temp to reach target temp. Waits only when heating
  *        Rxxx Wait for extruder current temp to reach target temp. Waits when heating and cooling

Marlin/src/gcode/temperature/M106_M107.cpp

@@ -32,12 +32,39 @@
  *
  *  S<int>   Speed between 0-255
  *  P<index> Fan index, if more than one fan
+ *
+ * With EXTRA_FAN_SPEED enabled:
+ *
+ *  T<int>   Restore/Use/Set Temporary Speed:
+ *           1     = Restore previous speed after T2
+ *           2     = Use temporary speed set with T3-255
+ *           3-255 = Set the speed for use with T2
  */
 void GcodeSuite::M106() {
-  uint16_t s = parser.ushortval('S', 255);
-  NOMORE(s, 255);
-  const uint8_t p = parser.byteval('P', 0);
-  if (p < FAN_COUNT) fanSpeeds[p] = s;
+  const uint8_t p = parser.byteval('P');
+  if (p < FAN_COUNT) {
+    #if ENABLED(EXTRA_FAN_SPEED)
+      const int16_t t = parser.intval('T');
+      NOMORE(t, 255);
+      if (t > 0) {
+        switch (t) {
+          case 1:
+            fanSpeeds[p] = old_fanSpeeds[p];
+            break;
+          case 2:
+            old_fanSpeeds[p] = fanSpeeds[p];
+            fanSpeeds[p] = new_fanSpeeds[p];
+            break;
+          default:
+            new_fanSpeeds[p] = t;
+            break;
+        }
+        return;
+      }
+    #endif // EXTRA_FAN_SPEED
+    const uint16_t s = parser.ushortval('S', 255);
+    fanSpeeds[p] = min(s, 255);
+  }
 }
 
 /**

Marlin/src/lcd/language/language_en.h

@@ -398,6 +398,9 @@
 #ifndef MSG_FAN_SPEED
   #define MSG_FAN_SPEED                       _UxGT("Fan speed")
 #endif
+#ifndef MSG_EXTRA_FAN_SPEED
+  #define MSG_EXTRA_FAN_SPEED                 _UxGT("Extra fan speed")
+#endif
 #ifndef MSG_FLOW
   #define MSG_FLOW                            _UxGT("Flow")
 #endif

Marlin/src/lcd/ultralcd.cpp

@@ -1238,6 +1238,15 @@ void kill_screen(const char* lcd_msg) {
 
   #endif // ADVANCED_PAUSE_FEATURE
 
+  // First Fan Speed title in "Tune" and "Control>Temperature" menus
+  #if FAN_COUNT > 0 && HAS_FAN0
+    #if FAN_COUNT > 1
+      #define FAN_SPEED_1_SUFFIX " 1"
+    #else
+      #define FAN_SPEED_1_SUFFIX ""
+    #endif
+  #endif
+
   /**
    *
    * "Tune" submenu
@@ -1293,18 +1302,22 @@ void kill_screen(const char* lcd_msg) {
     //
     #if FAN_COUNT > 0
       #if HAS_FAN0
-        #if FAN_COUNT > 1
-          #define MSG_1ST_FAN_SPEED MSG_FAN_SPEED " 1"
-        #else
-          #define MSG_1ST_FAN_SPEED MSG_FAN_SPEED
+        MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED FAN_SPEED_1_SUFFIX, &fanSpeeds[0], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED FAN_SPEED_1_SUFFIX, &new_fanSpeeds[0], 3, 255);
         #endif
-        MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_1ST_FAN_SPEED, &fanSpeeds[0], 0, 255);
       #endif
       #if HAS_FAN1
         MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED " 2", &fanSpeeds[1], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED " 2", &new_fanSpeeds[1], 3, 255);
+        #endif
       #endif
       #if HAS_FAN2
         MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED " 3", &fanSpeeds[2], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED " 3", &new_fanSpeeds[2], 3, 255);
+        #endif
       #endif
     #endif // FAN_COUNT > 0
 
@@ -3305,18 +3318,22 @@ void kill_screen(const char* lcd_msg) {
     //
     #if FAN_COUNT > 0
       #if HAS_FAN0
-        #if FAN_COUNT > 1
-          #define MSG_1ST_FAN_SPEED MSG_FAN_SPEED " 1"
-        #else
-          #define MSG_1ST_FAN_SPEED MSG_FAN_SPEED
+        MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED FAN_SPEED_1_SUFFIX, &fanSpeeds[0], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED FAN_SPEED_1_SUFFIX, &new_fanSpeeds[0], 3, 255);
         #endif
-        MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_1ST_FAN_SPEED, &fanSpeeds[0], 0, 255);
       #endif
       #if HAS_FAN1
         MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED " 2", &fanSpeeds[1], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED " 2", &new_fanSpeeds[1], 3, 255);
+        #endif
       #endif
       #if HAS_FAN2
         MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_FAN_SPEED " 3", &fanSpeeds[2], 0, 255);
+        #if ENABLED(EXTRA_FAN_SPEED)
+          MENU_MULTIPLIER_ITEM_EDIT(int3, MSG_EXTRA_FAN_SPEED " 3", &new_fanSpeeds[2], 3, 255);
+        #endif
       #endif
     #endif // FAN_COUNT > 0