Separate SWITCHING_NOZZLE and SWITCHING_EXTRUDER

Marlin/Conditionals_LCD.h

@@ -291,36 +291,34 @@
    *  TOOL_E_INDEX - Index to use when getting/setting the tool state
    *
    */
-  #if ENABLED(SINGLENOZZLE)             // One hotend, multi-extruder
-    #define HOTENDS      1
-    #define E_STEPPERS   EXTRUDERS
-    #define E_MANUAL     EXTRUDERS
-    #define TOOL_E_INDEX current_block->active_extruder
+  #if ENABLED(SINGLENOZZLE) || ENABLED(MIXING_EXTRUDER)         // One hotend, one thermistor, no XY offset
+    #define HOTENDS       1
     #undef TEMP_SENSOR_1_AS_REDUNDANT
     #undef HOTEND_OFFSET_X
     #undef HOTEND_OFFSET_Y
-  #elif ENABLED(SWITCHING_EXTRUDER)     // One E stepper, unified E axis, two hotends
-    #define HOTENDS      EXTRUDERS
-    #define E_STEPPERS   1
-    #define E_MANUAL     1
-    #define TOOL_E_INDEX 0
-    #ifndef HOTEND_OFFSET_Z
+  #else                                                         // Two hotends
+    #define HOTENDS       EXTRUDERS
+    #if ENABLED(SWITCHING_NOZZLE) && !defined(HOTEND_OFFSET_Z)
       #define HOTEND_OFFSET_Z { 0 }
     #endif
-  #elif ENABLED(MIXING_EXTRUDER)        // Multi-stepper, unified E axis, one hotend
-    #define HOTENDS      1
-    #define E_STEPPERS   MIXING_STEPPERS
-    #define E_MANUAL     1
-    #define TOOL_E_INDEX 0
-  #else                                 // One stepper, E axis, and hotend per tool
-    #define HOTENDS      EXTRUDERS
-    #define E_STEPPERS   EXTRUDERS
-    #define E_MANUAL     EXTRUDERS
-    #define TOOL_E_INDEX current_block->active_extruder
+  #endif
+
+  #if ENABLED(SWITCHING_EXTRUDER) || ENABLED(MIXING_EXTRUDER)   // Unified E axis
+    #if ENABLED(MIXING_EXTRUDER)
+      #define E_STEPPERS  MIXING_STEPPERS
+    #else
+      #define E_STEPPERS  1                                     // One E stepper
+    #endif
+    #define E_MANUAL      1
+    #define TOOL_E_INDEX  0
+  #else
+    #define E_STEPPERS    EXTRUDERS
+    #define E_MANUAL      EXTRUDERS
+    #define TOOL_E_INDEX  current_block->active_extruder
   #endif
 
   /**
-   * Distinct E Factors – Disable by commenting out DISTINCT_E_FACTORS
+   * DISTINCT_E_FACTORS affects how some E factors are accessed
    */
   #if ENABLED(DISTINCT_E_FACTORS) && E_STEPPERS > 1
     #define XYZE_N (XYZ + E_STEPPERS)

Marlin/Conditionals_post.h

@@ -326,7 +326,7 @@
     #ifndef HOTEND_OFFSET_Y
       #define HOTEND_OFFSET_Y { 0 } // Y offsets for each extruder
     #endif
-    #if !defined(HOTEND_OFFSET_Z) && (ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_EXTRUDER))
+    #if !defined(HOTEND_OFFSET_Z) && (ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_NOZZLE))
       #define HOTEND_OFFSET_Z { 0 }
     #endif
   #endif

Marlin/Configuration.h

@@ -137,12 +137,18 @@
 //#define SINGLENOZZLE
 
 // A dual extruder that uses a single stepper motor
-// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
 //#define SWITCHING_EXTRUDER
 #if ENABLED(SWITCHING_EXTRUDER)
   #define SWITCHING_EXTRUDER_SERVO_NR 0
   #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
-  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles
+//#define SWITCHING_NOZZLE
+#if ENABLED(SWITCHING_NOZZLE)
+  #define SWITCHING_NOZZLE_SERVO_NR 0
+  #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z { 0.0, 0.0 }
 #endif
 
 /**

Marlin/Marlin_main.cpp

@@ -7762,7 +7762,7 @@ inline void gcode_M211() {
    *   T<tool>
    *   X<xoffset>
    *   Y<yoffset>
-   *   Z<zoffset> - Available with DUAL_X_CARRIAGE and SWITCHING_EXTRUDER
+   *   Z<zoffset> - Available with DUAL_X_CARRIAGE and SWITCHING_NOZZLE
    */
   inline void gcode_M218() {
     if (get_target_extruder_from_command(218) || target_extruder == 0) return;
@@ -7770,7 +7770,7 @@ inline void gcode_M211() {
     if (code_seen('X')) hotend_offset[X_AXIS][target_extruder] = code_value_linear_units();
     if (code_seen('Y')) hotend_offset[Y_AXIS][target_extruder] = code_value_linear_units();
 
-    #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_EXTRUDER)
+    #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_NOZZLE)
       if (code_seen('Z')) hotend_offset[Z_AXIS][target_extruder] = code_value_linear_units();
     #endif
 
@@ -7781,7 +7781,7 @@ inline void gcode_M211() {
       SERIAL_ECHO(hotend_offset[X_AXIS][e]);
       SERIAL_CHAR(',');
       SERIAL_ECHO(hotend_offset[Y_AXIS][e]);
-      #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_EXTRUDER)
+      #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_NOZZLE)
         SERIAL_CHAR(',');
         SERIAL_ECHO(hotend_offset[Z_AXIS][e]);
       #endif
@@ -9364,6 +9364,14 @@ inline void gcode_M999() {
   }
 #endif
 
+#if ENABLED(SWITCHING_NOZZLE)
+  inline void move_nozzle_servo(uint8_t e) {
+    const int angles[2] = SWITCHING_NOZZLE_SERVO_ANGLES;
+    MOVE_SERVO(SWITCHING_NOZZLE_SERVO_NR, angles[e]);
+    safe_delay(500);
+  }
+#endif
+
 inline void invalid_extruder_error(const uint8_t &e) {
   SERIAL_ECHO_START;
   SERIAL_CHAR('T');
@@ -9511,7 +9519,7 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
           // No extra case for HAS_ABL in DUAL_X_CARRIAGE. Does that mean they don't work together?
         #else // !DUAL_X_CARRIAGE
 
-          #if ENABLED(SWITCHING_EXTRUDER)
+          #if ENABLED(SWITCHING_NOZZLE)
             // <0 if the new nozzle is higher, >0 if lower. A bigger raise when lower.
             const float z_diff = hotend_offset[Z_AXIS][active_extruder] - hotend_offset[Z_AXIS][tmp_extruder],
                         z_raise = 0.3 + (z_diff > 0.0 ? z_diff : 0.0);
@@ -9521,7 +9529,14 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
             planner.buffer_line_kinematic(current_position, planner.max_feedrate_mm_s[Z_AXIS], active_extruder);
             stepper.synchronize();
 
-            move_extruder_servo(active_extruder);
+            move_nozzle_servo(active_extruder);
+          #endif
+
+          #if ENABLED(SWITCHING_EXTRUDER)
+            #if !(ENABLED(SWITCHING_NOZZLE) && (SWITCHING_EXTRUDER_SERVO_NR == SWITCHING_NOZZLE_SERVO_NR))
+              stepper.synchronize();
+              move_extruder_servo(active_extruder);
+            #endif
           #endif
 
           /**
@@ -9644,7 +9659,7 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
           prepare_move_to_destination();
         }
 
-        #if ENABLED(SWITCHING_EXTRUDER)
+        #if ENABLED(SWITCHING_NOZZLE)
           // Move back down, if needed. (Including when the new tool is higher.)
           if (z_raise != z_diff) {
             destination[Z_AXIS] += z_diff;
@@ -9672,6 +9687,11 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
       UNUSED(fr_mm_s);
       UNUSED(no_move);
 
+      #if ENABLED(SWITCHING_EXTRUDER)
+        stepper.synchronize();
+        move_extruder_servo(active_extruder);
+      #endif
+
     #endif // HOTENDS <= 1
 
     SERIAL_ECHO_START;

Marlin/SanityCheck.h

@@ -329,11 +329,16 @@
 #endif
 
 /**
- * Only one type of extruder allowed
+ * A dual nozzle x-carriage with switching servo
  */
-#if (ENABLED(SWITCHING_EXTRUDER) && (ENABLED(SINGLENOZZLE) || ENABLED(MIXING_EXTRUDER))) \
-  || (ENABLED(SINGLENOZZLE) && ENABLED(MIXING_EXTRUDER))
-    #error "Please define only one type of extruder: SINGLENOZZLE, SWITCHING_EXTRUDER, or MIXING_EXTRUDER."
+#if ENABLED(SWITCHING_NOZZLE)
+  #if ENABLED(SINGLENOZZLE)
+    #error "SWITCHING_NOZZLE and SINGLENOZZLE are incompatible."
+  #elif EXTRUDERS < 2
+    #error "SWITCHING_NOZZLE requires exactly 2 EXTRUDERS."
+  #elif NUM_SERVOS < 1
+    #error "SWITCHING_NOZZLE requires NUM_SERVOS >= 1."
+  #endif
 #endif
 
 /**
@@ -355,12 +360,14 @@
 #if ENABLED(MIXING_EXTRUDER)
   #if EXTRUDERS > 1
     #error "MIXING_EXTRUDER currently only supports one extruder."
-  #endif
-  #if MIXING_STEPPERS < 2
+  #elif MIXING_STEPPERS < 2
     #error "You must set MIXING_STEPPERS >= 2 for a mixing extruder."
-  #endif
-  #if ENABLED(FILAMENT_SENSOR)
+  #elif ENABLED(FILAMENT_SENSOR)
     #error "MIXING_EXTRUDER is incompatible with FILAMENT_SENSOR. Comment out this line to use it anyway."
+  #elif ENABLED(SWITCHING_EXTRUDER)
+    #error "Please select either MIXING_EXTRUDER or SWITCHING_EXTRUDER, not both."
+  #elif ENABLED(SINGLENOZZLE)
+    #error "MIXING_EXTRUDER is incompatible with SINGLENOZZLE."
   #endif
 #endif
 

Marlin/configuration_store.cpp

@@ -1415,7 +1415,7 @@ void MarlinSettings::reset() {
         SERIAL_ECHOPAIR("  M218 T", (int)e);
         SERIAL_ECHOPAIR(" X", LINEAR_UNIT(hotend_offset[X_AXIS][e]));
         SERIAL_ECHOPAIR(" Y", LINEAR_UNIT(hotend_offset[Y_AXIS][e]));
-        #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_EXTRUDER)
+        #if ENABLED(DUAL_X_CARRIAGE) || ENABLED(SWITCHING_NOZZLE)
           SERIAL_ECHOPAIR(" Z", LINEAR_UNIT(hotend_offset[Z_AXIS][e]));
         #endif
         SERIAL_EOL;

Marlin/example_configurations/Cartesio/Configuration.h

@@ -138,12 +138,18 @@
 //#define SINGLENOZZLE
 
 // A dual extruder that uses a single stepper motor
-// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
 //#define SWITCHING_EXTRUDER
 #if ENABLED(SWITCHING_EXTRUDER)
   #define SWITCHING_EXTRUDER_SERVO_NR 0
   #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
-  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles
+//#define SWITCHING_NOZZLE
+#if ENABLED(SWITCHING_NOZZLE)
+  #define SWITCHING_NOZZLE_SERVO_NR 0
+  #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z { 0.0, 0.0 }
 #endif
 
 /**

Marlin/example_configurations/Felix/Configuration.h

@@ -137,12 +137,18 @@
 //#define SINGLENOZZLE
 
 // A dual extruder that uses a single stepper motor
-// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
 //#define SWITCHING_EXTRUDER
 #if ENABLED(SWITCHING_EXTRUDER)
   #define SWITCHING_EXTRUDER_SERVO_NR 0
   #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
-  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles
+//#define SWITCHING_NOZZLE
+#if ENABLED(SWITCHING_NOZZLE)
+  #define SWITCHING_NOZZLE_SERVO_NR 0
+  #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z { 0.0, 0.0 }
 #endif
 
 /**

Marlin/example_configurations/Felix/DUAL/Configuration.h

@@ -137,12 +137,18 @@
 //#define SINGLENOZZLE
 
 // A dual extruder that uses a single stepper motor
-// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
 //#define SWITCHING_EXTRUDER
 #if ENABLED(SWITCHING_EXTRUDER)
   #define SWITCHING_EXTRUDER_SERVO_NR 0
   #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
-  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles
+//#define SWITCHING_NOZZLE
+#if ENABLED(SWITCHING_NOZZLE)
+  #define SWITCHING_NOZZLE_SERVO_NR 0
+  #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z { 0.0, 0.0 }
 #endif
 
 /**

Marlin/example_configurations/FolgerTech-i3-2020/Configuration.h

@@ -137,12 +137,18 @@
 //#define SINGLENOZZLE
 
 // A dual extruder that uses a single stepper motor
-// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
 //#define SWITCHING_EXTRUDER
 #if ENABLED(SWITCHING_EXTRUDER)
   #define SWITCHING_EXTRUDER_SERVO_NR 0
   #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
-  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+// A dual-nozzle that uses a servomotor to raise/lower one of the nozzles
+//#define SWITCHING_NOZZLE
+#if ENABLED(SWITCHING_NOZZLE)
+  #define SWITCHING_NOZZLE_SERVO_NR 0
+  #define SWITCHING_NOZZLE_SERVO_ANGLES { 0, 90 }   // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z { 0.0, 0.0 }
 #endif
 
 /**