Improve M600 with timeout, wait for heatup.

Marlin/Configuration_adv.h

   #define FILAMENT_CHANGE_LOAD_LENGTH 0       // Load filament length over hotend in mm
                                               // Longer length for bowden printers to fast load filament into whole bowden tube over the hotend,
                                               // Short or zero length for printers without bowden where loading is not used
-  #define FILAMENT_CHANGE_LOAD_FEEDRATE 10    // Load filament feedrate in mm/s - filament loading into the bowden tube can be fast
+  #define FILAMENT_CHANGE_LOAD_FEEDRATE 6     // Load filament feedrate in mm/s - filament loading into the bowden tube can be fast
   #define FILAMENT_CHANGE_EXTRUDE_LENGTH 50   // Extrude filament length in mm after filament is load over the hotend,
                                               // 0 to disable for manual extrusion
                                               // Filament can be extruded repeatedly from the filament exchange menu to fill the hotend,
                                               // or until outcoming filament color is not clear for filament color change
   #define FILAMENT_CHANGE_EXTRUDE_FEEDRATE 3  // Extrude filament feedrate in mm/s - must be slower than load feedrate
+  #define FILAMENT_CHANGE_NOZZLE_TIMEOUT 45L  // Turn off nozzle if user doesn't change filament within this time limit in seconds
+  #define FILAMENT_CHANGE_NUMBER_OF_ALERT_BEEPS  5L             // Number of alert beeps before printer goes quiet 
+  #define STEPPER_MOTORS_DONT_TIMEOUT_DURING_FILAMENT_CHANGE    // Enable to make stepper motors hold position during filament change even if it 
+                                                                // takes longer than DEFAULT_STEPPER_DEACTIVE_TIME
 #endif
 
 /******************************************************************************\

Marlin/Marlin_main.cpp

 
 #if ENABLED(FILAMENT_CHANGE_FEATURE)
 
+  millis_t next_buzz = 0;
+  unsigned long int runout_beep = 0;
+
+  void filament_change_beep() {
+    millis_t ms = millis(); 
+    if (ms >= next_buzz) { 
+      if (runout_beep <= FILAMENT_CHANGE_NUMBER_OF_ALERT_BEEPS ) { // Only beep as long as we are supposed to! 
+      BUZZ(300, 2000); 
+      next_buzz = ms + 2500; // Beep every 2.5s while waiting 
+      runout_beep++; 
+      } 
+      else if (runout_beep > FILAMENT_CHANGE_NUMBER_OF_ALERT_BEEPS  && 
+               runout_beep <= (FILAMENT_CHANGE_NUMBER_OF_ALERT_BEEPS + 5)) { // End with a burst of short beeps 
+        BUZZ(200, 2000); 
+        next_buzz = ms + 400; // Beep  
+        runout_beep++; 
+      }
+    }
+  }
+
+  bool busy_doing_M600 = false;
+
   /**
    * M600: Pause for filament change
    *
       return;
     }
 
+    busy_doing_M600 = true;  // Stepper Motors can't timeout when this is set
+
     // Show initial message and wait for synchronize steppers
     lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_INIT);
     stepper.synchronize();
 
     stepper.synchronize();
     lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_UNLOAD);
+    idle();
 
     // Unload filament
     if (code_seen('L')) destination[E_AXIS] += code_value_axis_units(E_AXIS);
     disable_e3();
     delay(100);
 
-    #if HAS_BUZZER
-      millis_t next_buzz = 0;
-    #endif
+    millis_t nozzle_timeout = millis() + FILAMENT_CHANGE_NOZZLE_TIMEOUT*1000L;
+    bool nozzle_timed_out = false;
+    float temps[4];
+    int iii;
 
     // Wait for filament insert by user and press button
     lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_INSERT);
 
-    // LCD click or M108 will clear this
-    wait_for_user = true;
+    idle();
+
+    wait_for_user = true;    // LCD click or M108 will clear this
+    next_buzz = 0;
+    runout_beep = 0;
+    for( iii=0; iii<HOTENDS; iii++)      //Save nozzle temps
+      temps[iii] = thermalManager.target_temperature[iii]; 
 
     while (wait_for_user) {
-      #if HAS_BUZZER
-        millis_t ms = millis();
-        if (ms >= next_buzz) {
-          BUZZ(300, 2000);
-          next_buzz = ms + 2500; // Beep every 2.5s while waiting
+      millis_t current_ms = millis();
+      if (nozzle_timed_out == true)
+        lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_CLICK_TO_HEAT_NOZZLE);
+      #if HAS_BUZZER 
+        filament_change_beep();
+      #endif //HAS_BUZZER
+
+      if (current_ms >= nozzle_timeout) {
+        if (nozzle_timed_out == false ) {
+          nozzle_timed_out = true;         // if the nozzle time out happens, remember we turned off the nozzles. 
+          for( iii=0; iii<HOTENDS; iii++)  // turn off all the nozzles
+            thermalManager.setTargetHotend( 0.0 , iii );
+
+          lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_CLICK_TO_HEAT_NOZZLE);
         }
+      }
+      idle(true);
+    }
+
+    if (nozzle_timed_out == true ) {      // Turn nozzles back on if we turned them off.
+      for( iii=0; iii<HOTENDS; iii++)
+        thermalManager.setTargetHotend( temps[iii] , iii );
+      lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_WAIT_FOR_NOZZLES_TO_HEAT);
+    }
+
+KEEP_CHECKING_TEMPS:
+    idle();
+    for( iii=0; iii<HOTENDS; iii++){
+      if (abs(thermalManager.degHotend(iii)-temps[iii]) > 3 ) {
+        lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_WAIT_FOR_NOZZLES_TO_HEAT);
+        goto KEEP_CHECKING_TEMPS;
+      }
+    }
+
+    wait_for_user = true;    // LCD click or M108 will clear this
+    next_buzz = 0;
+    runout_beep = 0;
+    while (wait_for_user) {
+      if (nozzle_timed_out == true)
+        lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_INSERT);
+      else break;
+      #if HAS_BUZZER
+        filament_change_beep();
       #endif
       idle(true);
     }
     // Show load message
     lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_LOAD);
 
+    idle();
+
     // Load filament
     if (code_seen('L')) destination[E_AXIS] -= code_value_axis_units(E_AXIS);
     #if defined(FILAMENT_CHANGE_LOAD_LENGTH) && FILAMENT_CHANGE_LOAD_LENGTH > 0
 
     // Show status screen
     lcd_filament_change_show_message(FILAMENT_CHANGE_MESSAGE_STATUS);
+    busy_doing_M600 = false;  // Allow Stepper Motors to be turned off during inactivity
   }
 
 #endif // FILAMENT_CHANGE_FEATURE
   millis_t ms = millis();
 
   if (max_inactive_time && ELAPSED(ms, previous_cmd_ms + max_inactive_time)) kill(PSTR(MSG_KILLED));
-
+	
+  #if ENABLED(FILAMENT_CHANGE_FEATURE)
+    #ifdef STEPPER_MOTORS_DONT_TIMEOUT_DURING_FILAMENT_CHANGE
+      if (busy_doing_M600 == false )	   // We only allow the stepper motors to time out if
+    #endif                                 // we are not in the middle of an M600 command.
+  #endif
+             
   if (stepper_inactive_time && ELAPSED(ms, previous_cmd_ms + stepper_inactive_time)
       && !ignore_stepper_queue && !planner.blocks_queued()) {
     #if ENABLED(DISABLE_INACTIVE_X)

Marlin/dogm_font_data_ISO10646_1_tr.h

   X Font      ascent = 7 descent=-1
   Max Font    ascent = 8 descent=-1
 */
-#include "U8glib.h"
+#include <U8glib.h>
 const u8g_fntpgm_uint8_t ISO10646_TR[2591] U8G_SECTION(".progmem.ISO10646_TR") = {
   0,6,9,0,254,7,1,146,3,33,32,255,255,8,255,7,
   255,0,0,0,6,0,0,1,7,7,6,2,0,128,128,128,

Marlin/endstops.cpp

     SERIAL_PROTOCOLPGM(MSG_Z_PROBE);
     SERIAL_PROTOCOLLN(((READ(Z_MIN_PROBE_PIN)^Z_MIN_PROBE_ENDSTOP_INVERTING) ? MSG_ENDSTOP_HIT : MSG_ENDSTOP_OPEN));
   #endif
+  #if ENABLED(FILAMENT_RUNOUT_SENSOR)
+    SERIAL_PROTOCOLPGM(MSG_FILAMENT_RUNOUT_SENSOR);
+    SERIAL_PROTOCOLLN(((READ(FIL_RUNOUT_PIN)^FIL_RUNOUT_INVERTING) ? MSG_ENDSTOP_HIT : MSG_ENDSTOP_OPEN));
+  #endif
 } // Endstops::M119
 
 #if ENABLED(Z_DUAL_ENDSTOPS)

Marlin/enum.h

       FILAMENT_CHANGE_MESSAGE_EXTRUDE,
       FILAMENT_CHANGE_MESSAGE_OPTION,
       FILAMENT_CHANGE_MESSAGE_RESUME,
-      FILAMENT_CHANGE_MESSAGE_STATUS
+      FILAMENT_CHANGE_MESSAGE_STATUS,
+      FILAMENT_CHANGE_MESSAGE_CLICK_TO_HEAT_NOZZLE,
+      FILAMENT_CHANGE_MESSAGE_WAIT_FOR_NOZZLES_TO_HEAT
     };
   #endif
 #endif

Marlin/language.h

 #define MSG_Z2_MIN                          "z2_min: "
 #define MSG_Z2_MAX                          "z2_max: "
 #define MSG_Z_PROBE                         "z_probe: "
+#define MSG_FILAMENT_RUNOUT_SENSOR          "filament_Runout_Sensor: "
 #define MSG_ERR_MATERIAL_INDEX              "M145 S<index> out of range (0-1)"
 #define MSG_ERR_M355_NONE                   "No case light"
 #define MSG_ERR_M421_PARAMETERS             "M421 required parameters missing"

Marlin/language_en.h

 #ifndef WELCOME_MSG
   #define WELCOME_MSG                         MACHINE_NAME _UxGT(" ready.")
 #endif
+#ifndef MSG_BACK
+  #define MSG_BACK                            _UxGT("Back")
+#endif
 #ifndef MSG_SD_INSERTED
   #define MSG_SD_INSERTED                     _UxGT("Card inserted")
 #endif
 #ifndef MSG_DELTA_CALIBRATE_CENTER
   #define MSG_DELTA_CALIBRATE_CENTER          _UxGT("Calibrate Center")
 #endif
-
 #ifndef MSG_INFO_MENU
   #define MSG_INFO_MENU                       _UxGT("About Printer")
 #endif
 #ifndef MSG_FILAMENT_CHANGE_OPTION_RESUME
   #define MSG_FILAMENT_CHANGE_OPTION_RESUME   _UxGT("Resume print")
 #endif
+#ifndef MSG_FILAMENT_CHANGE_MINTEMP
+  #define MSG_FILAMENT_CHANGE_MINTEMP         _UxGT("Minimum Temp is ")
+#endif
+#ifndef MSG_FILAMENT_CHANGE_NOZZLE
+  #define MSG_FILAMENT_CHANGE_NOZZLE          _UxGT("  Nozzle: ")
+#endif
 
 //
 // Filament Change screens show up to 3 lines on a 4-line display
     #define MSG_FILAMENT_CHANGE_INSERT_2        _UxGT("and press button")
     #define MSG_FILAMENT_CHANGE_INSERT_3        _UxGT("to continue...")
   #endif
+  #ifndef MSG_FILAMENT_CHANGE_HEAT_1
+    #define MSG_FILAMENT_CHANGE_HEAT_1          _UxGT("Press button to")
+    #define MSG_FILAMENT_CHANGE_HEAT_2          _UxGT("heat nozzle.")
+  #endif
+  #ifndef MSG_FILAMENT_CHANGE_HEATING_1
+    #define MSG_FILAMENT_CHANGE_HEATING_1       _UxGT("Heating nozzle")
+    #define MSG_FILAMENT_CHANGE_HEATING_2       _UxGT("Please wait...")
+  #endif
   #ifndef MSG_FILAMENT_CHANGE_LOAD_1
     #define MSG_FILAMENT_CHANGE_LOAD_1          _UxGT("Wait for")
     #define MSG_FILAMENT_CHANGE_LOAD_2          _UxGT("filament load")
   #ifndef MSG_FILAMENT_CHANGE_INSERT_1
     #define MSG_FILAMENT_CHANGE_INSERT_1        _UxGT("Insert and Click")
   #endif
+  #ifndef MSG_FILAMENT_CHANGE_HEATING_1
+    #define MSG_FILAMENT_CHANGE_HEATING_1       _UxGT("Heating...")
+  #endif
   #ifndef MSG_FILAMENT_CHANGE_LOAD_1
     #define MSG_FILAMENT_CHANGE_LOAD_1          _UxGT("Loading...")
   #endif

Marlin/ultralcd.cpp

 
 #if ENABLED(DOGLCD)
   #include "ultralcd_impl_DOGM.h"
+  #include <U8glib.h>
 #else
   #include "ultralcd_impl_HD44780.h"
 #endif
     void lcd_filament_change_unload_message();
     void lcd_filament_change_insert_message();
     void lcd_filament_change_load_message();
+    void lcd_filament_change_heat_nozzle();
     void lcd_filament_change_extrude_message();
     void lcd_filament_change_resume_message();
   #endif
     // Change filament
     //
     #if ENABLED(FILAMENT_CHANGE_FEATURE)
-       MENU_ITEM(function, MSG_FILAMENTCHANGE, lcd_enqueue_filament_change);
+   	  if (!thermalManager.tooColdToExtrude(active_extruder))
+        MENU_ITEM(function, MSG_FILAMENTCHANGE, lcd_enqueue_filament_change);
     #endif
 
     END_MENU();
         MENU_ITEM(function, MSG_PREHEAT_1, lcd_preheat_material1_hotend0);
         MENU_ITEM(function, MSG_PREHEAT_2, lcd_preheat_material2_hotend0);
       #endif
+
       //
       // Change filament
       //
       #if ENABLED(FILAMENT_CHANGE_FEATURE)
-        MENU_ITEM(function, MSG_FILAMENTCHANGE, lcd_enqueue_filament_change);
+        if (!thermalManager.tooColdToExtrude(active_extruder))
+          MENU_ITEM(function, MSG_FILAMENTCHANGE, lcd_enqueue_filament_change);
       #endif
     #endif
 
     }
   #endif // LCD_INFO_MENU
 
+    /**
+     *
+     * Filament Change Feature Screens
+     *
+     */
   #if ENABLED(FILAMENT_CHANGE_FEATURE)
+
     void lcd_filament_change_toocold_menu() {
       START_MENU();
       STATIC_ITEM(MSG_HEATING_FAILED_LCD, true, true);
-      MENU_BACK(MSG_FILAMENTCHANGE);
+      STATIC_ITEM (MSG_FILAMENT_CHANGE_MINTEMP STRINGIFY(EXTRUDE_MINTEMP) ".", false, false);
+      MENU_BACK(MSG_BACK);
+      STATIC_ITEM (" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_MENU();
     }
 
       #ifdef MSG_FILAMENT_CHANGE_INIT_3
         STATIC_ITEM(MSG_FILAMENT_CHANGE_INIT_3);
       #endif
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_SCREEN();
     }
 
       #ifdef MSG_FILAMENT_CHANGE_UNLOAD_3
         STATIC_ITEM(MSG_FILAMENT_CHANGE_UNLOAD_3);
       #endif
+      STATIC_ITEM (" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
+      END_SCREEN();
+    }
+
+    void lcd_filament_change_wait_for_nozzles_to_heat() {
+      START_SCREEN();
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_HEADER, true, true);
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_HEATING_1);
+      #ifdef MSG_FILAMENT_CHANGE_HEATING_2
+        STATIC_ITEM(MSG_FILAMENT_CHANGE_HEATING_2);
+      #endif
+      STATIC_ITEM(" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
+      END_SCREEN();
+    }
+
+    void lcd_filament_change_heat_nozzle() {
+      START_SCREEN();
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_HEADER, true, true);
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_HEAT_1);
+      #ifdef MSG_FILAMENT_CHANGE_INSERT_2
+        STATIC_ITEM(MSG_FILAMENT_CHANGE_HEAT_2);
+      #endif
+      STATIC_ITEM(" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_SCREEN();
     }
 
       #ifdef MSG_FILAMENT_CHANGE_INSERT_3
         STATIC_ITEM(MSG_FILAMENT_CHANGE_INSERT_3);
       #endif
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_SCREEN();
     }
 
       #ifdef MSG_FILAMENT_CHANGE_LOAD_3
         STATIC_ITEM(MSG_FILAMENT_CHANGE_LOAD_3);
       #endif
+      STATIC_ITEM(" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_SCREEN();
     }
 
       #ifdef MSG_FILAMENT_CHANGE_EXTRUDE_3
         STATIC_ITEM(MSG_FILAMENT_CHANGE_EXTRUDE_3);
       #endif
+      STATIC_ITEM(" ");
+      STATIC_ITEM(MSG_FILAMENT_CHANGE_NOZZLE, false, true);
+      lcd_implementation_hotend_status();
       END_SCREEN();
     }
 
       switch (message) {
         case FILAMENT_CHANGE_MESSAGE_INIT:
           defer_return_to_status = true;
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
           lcd_goto_screen(lcd_filament_change_init_message);
           break;
         case FILAMENT_CHANGE_MESSAGE_UNLOAD:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
           lcd_goto_screen(lcd_filament_change_unload_message);
           break;
         case FILAMENT_CHANGE_MESSAGE_INSERT:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
           lcd_goto_screen(lcd_filament_change_insert_message);
           break;
         case FILAMENT_CHANGE_MESSAGE_LOAD:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
           lcd_goto_screen(lcd_filament_change_load_message);
           break;
         case FILAMENT_CHANGE_MESSAGE_EXTRUDE:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
           lcd_goto_screen(lcd_filament_change_extrude_message);
           break;
+        case FILAMENT_CHANGE_MESSAGE_CLICK_TO_HEAT_NOZZLE:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
+          lcd_goto_screen(lcd_filament_change_heat_nozzle);
+          break;
+        case FILAMENT_CHANGE_MESSAGE_WAIT_FOR_NOZZLES_TO_HEAT:
+          lcdDrawUpdate = LCDVIEW_CALL_REDRAW_NEXT;
+          lcd_goto_screen(lcd_filament_change_wait_for_nozzles_to_heat);
+          break;
         case FILAMENT_CHANGE_MESSAGE_OPTION:
           filament_change_menu_response = FILAMENT_CHANGE_RESPONSE_WAIT_FOR;
           lcd_goto_screen(lcd_filament_change_option_menu);

Marlin/ultralcd_impl_DOGM.h

 
 //#define DOGM_SD_PERCENT
 
+
+static void lcd_implementation_hotend_status() {
+  u8g.setPrintPos(58, 60);
+  lcd_print( (char) '0'+active_extruder );
+  lcd_print( ' ' ); 
+  lcd_print( ' ' ); 
+  lcd_print(itostr3(thermalManager.degHotend(active_extruder)));
+  lcd_print('/');
+  lcd_print(itostr3(thermalManager.degTargetHotend(active_extruder)));
+}
+
 static void lcd_implementation_status_screen() {
 
   bool blink = lcd_blink();

Marlin/ultralcd_impl_HD44780.h

 
 #endif // LCD_PROGRESS_BAR
 
+static void lcd_implementation_hotend_status() {
+  lcd.setCursor(10,3);
+  lcd.print(LCD_STR_THERMOMETER[active_extruder]);
+  lcd.print(itostr3(thermalManager.degHotend(active_extruder)));
+  lcd.print('/');
+  lcd.print(itostr3(thermalManager.degTargetHotend(active_extruder)));
+}
+
 /**
 Possible status screens:
 16x2   |000/000 B000/000|

README.md

 ## Recent Changes
 - RCBugFix
   - Fixed broken MBL
+  - M600 heater timeout option
 
 - RC8 - 06 Dec 2016
   - Major performance improvement for Graphical LCDs