Do not heat the bed, on load/unload

If during a paused print, the preheat is canceled, keep the bed target temperature
Display bed temperatures only if bed is also heated
Remove not needed variables nTargetOld and nTargetBedOld from the mFilamentItem function
Define new Setting "HeatBedOnLoad" [Yes/No]

Firmware/eeprom.cpp

@@ -57,6 +57,9 @@ void eeprom_init()
     eeprom_init_default_dword((uint32_t*)EEPROM_TOTALTIME, 0);
     eeprom_init_default_dword((uint32_t*)EEPROM_FILAMENTUSED, 0);
     eeprom_init_default_byte((uint8_t*)EEPROM_MMU_CUTTER_ENABLED, 0);
+
+    eeprom_init_default_byte((uint8_t*)EEPROM_HEAT_BED_ON_LOAD_FILAMENT, 1);
+
 }
 
 //! @brief Get default sheet name for index

Firmware/eeprom.h

@@ -344,6 +344,9 @@ static_assert(sizeof(Sheets) == EEPROM_SHEETS_SIZEOF, "Sizeof(Sheets) is not EEP
 | 0x0CAD 3245 | uint8   | EEPROM_FSENSOR_JAM_DETECTION          | 01h 1        | ff/01                 | fsensor pat9125 jam detection feature             | LCD menu     | D3 Ax0cad C1
 | 0x0CAC 3244 | uint8   | EEPROM_MMU_ENABLED                    | 01h 1        | ff/01                 | MMU enabled                                       | LCD menu     | D3 Ax0cac C1
 | 0x0CA8 3240 | uint32  | EEPROM_TOTAL_TOOLCHANGE_COUNT         | ???          | ff ff ff ffh          | MMU toolchange counter over printers lifetime     | LCD statistic| D3 Ax0ca8 C4
+| 0x0CA7 3239 | uint8   | EEPROM_HEAT_BED_ON_LOAD_FILAMENT      | ffh 255      | ffh 255               | Heat bed on load filament unknown state           | LCD menu     | D3 Ax0d02 C1
+| ^           | ^       | ^                                     | 00h 0        | ^                     | Do not heat bed on load filament                  | ^            | ^
+| ^           | ^       | ^                                     | 01h 1        | ^                     | Heat bed on load filament                         | ^            | ^
 
 |Address begin|Bit/Type | Name                                  | Valid values | Default/FactoryReset  | Description                                       |Gcode/Function| Debug code
 | :--:        | :--:    | :--:                                  | :--:         | :--:                  | :--:                                              | :--:         | :--:
@@ -570,8 +573,10 @@ static Sheets * const EEPROM_Sheets_base = (Sheets*)(EEPROM_SHEETS_BASE);
 #define EEPROM_FSENSOR_JAM_DETECTION (EEPROM_TEMP_MODEL_E-1) // uint8_t
 #define EEPROM_MMU_ENABLED (EEPROM_FSENSOR_JAM_DETECTION-1) // uint8_t
 #define EEPROM_TOTAL_TOOLCHANGE_COUNT (EEPROM_MMU_ENABLED-4)
+#define EEPROM_HEAT_BED_ON_LOAD_FILAMENT (EEPROM_TOTAL_TOOLCHANGE_COUNT-1) //uint8
+
 //This is supposed to point to last item to allow EEPROM overrun check. Please update when adding new items.
-#define EEPROM_LAST_ITEM EEPROM_TOTAL_TOOLCHANGE_COUNT
+#define EEPROM_LAST_ITEM EEPROM_HEAT_BED_ON_LOAD_FILAMENT
 // !!!!!
 // !!!!! this is end of EEPROM section ... all updates MUST BE inserted before this mark !!!!!
 // !!!!!

Firmware/ultralcd.cpp

@@ -1824,12 +1824,42 @@ bool bFilamentPreheatState;
 bool bFilamentAction=false;
 static bool bFilamentWaitingFlag=false;
 
+bool shouldPreheatOnlyNozzle() {
+    uint8_t eeprom_setting = eeprom_read_byte((uint8_t*)EEPROM_HEAT_BED_ON_LOAD_FILAMENT);
+    if (eeprom_setting != 0)
+        return false;
+
+    switch(eFilamentAction) {
+        case FilamentAction::Load:
+        case FilamentAction::AutoLoad:
+        case FilamentAction::UnLoad:
+        case FilamentAction::MmuLoad:
+        case FilamentAction::MmuUnLoad:
+        case FilamentAction::MmuEject:
+        case FilamentAction::MmuCut:
+            return true;
+        default:
+            return false;
+    }
+}
+
+void lcd_print_target_temps_first_line(){
+    lcd_set_cursor(0, 0);
+    lcdui_print_temp(LCD_STR_THERMOMETER[0], (int) degHotend(0), (int) degTargetHotend(0));
+    lcd_set_cursor(10, 0);
+    int targetBedTemp = (int) degTargetBed();
+    if (targetBedTemp) {
+        lcdui_print_temp(LCD_STR_BEDTEMP[0], (int) degBed(), targetBedTemp);
+    } else {
+        lcd_space(10);
+    }
+}
+
 static void mFilamentPrompt()
 {
 uint8_t nLevel;
 
-lcd_set_cursor(0,0);
-lcdui_print_temp(LCD_STR_THERMOMETER[0],(int)degHotend(0),(int)degTargetHotend(0));
+lcd_print_target_temps_first_line();
 lcd_puts_at_P(0,1, _i("Press the knob"));                 ////MSG_PRESS_KNOB c=20
 lcd_set_cursor(0,2);
 switch(eFilamentAction)
@@ -1891,14 +1921,10 @@ switch(eFilamentAction)
 
 void mFilamentItem(uint16_t nTemp, uint16_t nTempBed)
 {
-    static int nTargetOld;
-    static int nTargetBedOld;
     uint8_t nLevel;
 
-    nTargetOld = target_temperature[0];
-    nTargetBedOld = target_temperature_bed;
-    setTargetHotend0((float )nTemp);
-    setTargetBed((float) nTempBed);
+    setTargetHotend0((float)nTemp);
+    if (!shouldPreheatOnlyNozzle()) setTargetBed((float)nTempBed);
 
     {
         const FilamentAction action = eFilamentAction;
@@ -2033,8 +2059,7 @@ void mFilamentItem(uint16_t nTemp, uint16_t nTempBed)
         }
 
         if (bFilamentWaitingFlag) {
-            lcd_set_cursor(0, 0);
-            lcdui_print_temp(LCD_STR_THERMOMETER[0], (int) degHotend(0), (int) degTargetHotend(0));
+            lcd_print_target_temps_first_line();
         }
 
         if (lcd_clicked())
@@ -2043,14 +2068,9 @@ void mFilamentItem(uint16_t nTemp, uint16_t nTempBed)
             if (!bFilamentPreheatState)
             {
                 setTargetHotend0(0.0);
-                setTargetBed(0.0);
+                if (!isPrintPaused) setTargetBed(0.0);
                 menu_back();
             }
-            else
-            {
-                setTargetHotend0((float )nTargetOld);
-                setTargetBed((float) nTargetBedOld);
-            }
             menu_back();
             if (eFilamentAction == FilamentAction::AutoLoad) eFilamentAction = FilamentAction::None; // i.e. non-autoLoad
         }
@@ -2155,16 +2175,17 @@ void lcd_generic_preheat_menu()
     }
     else
     {
-        MENU_ITEM_SUBMENU_P(PSTR("PLA  -  " STRINGIFY(PLA_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PLA_PREHEAT_HPB_TEMP)),mFilamentItem_PLA);
-        MENU_ITEM_SUBMENU_P(PSTR("PET  -  " STRINGIFY(PET_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PET_PREHEAT_HPB_TEMP)),mFilamentItem_PET);
-        MENU_ITEM_SUBMENU_P(PSTR("ASA  -  " STRINGIFY(ASA_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(ASA_PREHEAT_HPB_TEMP)),mFilamentItem_ASA);
-        MENU_ITEM_SUBMENU_P(PSTR("PC   -  " STRINGIFY(PC_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PC_PREHEAT_HPB_TEMP)),mFilamentItem_PC);
-        MENU_ITEM_SUBMENU_P(PSTR("PVB  -  " STRINGIFY(PVB_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PVB_PREHEAT_HPB_TEMP)),mFilamentItem_PVB);
-        MENU_ITEM_SUBMENU_P(PSTR("PA   -  " STRINGIFY(PA_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PA_PREHEAT_HPB_TEMP)),mFilamentItem_PA);
-        MENU_ITEM_SUBMENU_P(PSTR("ABS  -  " STRINGIFY(ABS_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(ABS_PREHEAT_HPB_TEMP)),mFilamentItem_ABS);
-        MENU_ITEM_SUBMENU_P(PSTR("HIPS -  " STRINGIFY(HIPS_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(HIPS_PREHEAT_HPB_TEMP)),mFilamentItem_HIPS);
-        MENU_ITEM_SUBMENU_P(PSTR("PP   -  " STRINGIFY(PP_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PP_PREHEAT_HPB_TEMP)),mFilamentItem_PP);
-        MENU_ITEM_SUBMENU_P(PSTR("FLEX -  " STRINGIFY(FLEX_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(FLEX_PREHEAT_HPB_TEMP)),mFilamentItem_FLEX);
+        bool bPreheatOnlyNozzle = shouldPreheatOnlyNozzle();
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PLA  -  " STRINGIFY(PLA_PREHEAT_HOTEND_TEMP)) : PSTR("PLA  -  " STRINGIFY(PLA_PREHEAT_HOTEND_TEMP)  "/" STRINGIFY(PLA_PREHEAT_HPB_TEMP)) , mFilamentItem_PLA);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PET  -  " STRINGIFY(PET_PREHEAT_HOTEND_TEMP)) : PSTR("PET  -  " STRINGIFY(PET_PREHEAT_HOTEND_TEMP)  "/" STRINGIFY(PET_PREHEAT_HPB_TEMP)) , mFilamentItem_PET);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("ASA  -  " STRINGIFY(ASA_PREHEAT_HOTEND_TEMP)) : PSTR("ASA  -  " STRINGIFY(ASA_PREHEAT_HOTEND_TEMP)  "/" STRINGIFY(ASA_PREHEAT_HPB_TEMP)) , mFilamentItem_ASA);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PC   -  " STRINGIFY(PC_PREHEAT_HOTEND_TEMP))  : PSTR("PC   -  " STRINGIFY(PC_PREHEAT_HOTEND_TEMP)   "/" STRINGIFY(PC_PREHEAT_HPB_TEMP))  , mFilamentItem_PC);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PVB  -  " STRINGIFY(PVB_PREHEAT_HOTEND_TEMP)) : PSTR("PVB  -  " STRINGIFY(PVB_PREHEAT_HOTEND_TEMP)  "/" STRINGIFY(PVB_PREHEAT_HPB_TEMP)) , mFilamentItem_PVB);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PA   -  " STRINGIFY(PA_PREHEAT_HOTEND_TEMP))  : PSTR("PA   -  " STRINGIFY(PA_PREHEAT_HOTEND_TEMP)   "/" STRINGIFY(PA_PREHEAT_HPB_TEMP))  , mFilamentItem_PA);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("ABS  -  " STRINGIFY(ABS_PREHEAT_HOTEND_TEMP)) : PSTR("ABS  -  " STRINGIFY(ABS_PREHEAT_HOTEND_TEMP)  "/" STRINGIFY(ABS_PREHEAT_HPB_TEMP)) , mFilamentItem_ABS);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("HIPS -  " STRINGIFY(HIPS_PREHEAT_HOTEND_TEMP)): PSTR("HIPS -  " STRINGIFY(HIPS_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(HIPS_PREHEAT_HPB_TEMP)), mFilamentItem_HIPS);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("PP   -  " STRINGIFY(PP_PREHEAT_HOTEND_TEMP))  : PSTR("PP   -  " STRINGIFY(PP_PREHEAT_HOTEND_TEMP)   "/" STRINGIFY(PP_PREHEAT_HPB_TEMP))  , mFilamentItem_PP);
+        MENU_ITEM_SUBMENU_P(bPreheatOnlyNozzle ? PSTR("FLEX -  " STRINGIFY(FLEX_PREHEAT_HOTEND_TEMP)): PSTR("FLEX -  " STRINGIFY(FLEX_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(FLEX_PREHEAT_HPB_TEMP)), mFilamentItem_FLEX);
     }
     if (!eeprom_read_byte((uint8_t*)EEPROM_WIZARD_ACTIVE) && eFilamentAction == FilamentAction::Preheat) MENU_ITEM_FUNCTION_P(_T(MSG_COOLDOWN), lcd_cooldown);
     MENU_END();
@@ -4731,6 +4752,9 @@ static void lcd_settings_menu()
     }
 #endif //LCD_BL_PIN
 
+    //! Enables/disables the bed heating while heating the nozzle for loading/unloading filament
+    MENU_ITEM_TOGGLE_P(_N("HeatBedOnLoad"), eeprom_read_byte((uint8_t *)EEPROM_HEAT_BED_ON_LOAD_FILAMENT) ? _T(MSG_YES) : _T(MSG_NO), lcd_heat_bed_on_load_toggle);
+
 	if (farm_mode)
 	{
 		MENU_ITEM_FUNCTION_P(PSTR("Disable farm mode"), lcd_disable_farm_mode);
@@ -7766,3 +7790,13 @@ void lcd_pinda_temp_compensation_toggle()
 	SERIAL_ECHOLN(pinda_temp_compensation);
 }
 #endif //PINDA_TEMP_COMP
+
+void lcd_heat_bed_on_load_toggle()
+{
+    uint8_t value = eeprom_read_byte((uint8_t*)EEPROM_HEAT_BED_ON_LOAD_FILAMENT);
+    if (value > 1)
+        value = 1;
+    else
+        value = !value;
+    eeprom_update_byte((uint8_t*)EEPROM_HEAT_BED_ON_LOAD_FILAMENT, value);
+}

Firmware/ultralcd.h

@@ -255,4 +255,6 @@ uint8_t lcdui_print_extruder(void);
 extern void lcd_pinda_temp_compensation_toggle();
 #endif //PINDA_TEMP_COMP
 
+extern void lcd_heat_bed_on_load_toggle();
+
 #endif //ULTRALCD_H