Merge pull request prusa3d#4765 from leptun/MBL_fixes

Region MBL fixes

Firmware/Marlin_main.cpp

@@ -2583,7 +2583,8 @@ static void gcode_G80()
 {
     constexpr float XY_AXIS_FEEDRATE = (homing_feedrate[X_AXIS] * 3) / 60;
     constexpr float Z_LIFT_FEEDRATE = homing_feedrate[Z_AXIS] / 60;
-    constexpr float Z_CALIBRATION_THRESHOLD = 0.35f;
+    constexpr float Z_CALIBRATION_THRESHOLD_TIGHT = 0.35f; // used for 7x7 MBL
+    constexpr float Z_CALIBRATION_THRESHOLD_RELAXED = 1.f; // used for 3x3 MBL
     constexpr float MESH_HOME_Z_SEARCH_FAST = 0.35f;
     st_synchronize();
     if (planner_aborted)
@@ -2618,6 +2619,10 @@ static void gcode_G80()
     if (uint8_t codeSeen = code_seen('N'), value = code_value_uint8(); codeSeen && (value == 7 || value == 3))
       nMeasPoints = value;
 
+    // 7x7 region MBL needs tighter thresholds for triggering a Z realignment. This is because you want to have as little of a misalignment as possible between
+    // the "inner" MBL region and "outer" MBL region which is interpolated from Z calibration values.
+    const float Z_CALIBRATION_THRESHOLD = (nMeasPoints == 3) ? Z_CALIBRATION_THRESHOLD_RELAXED : Z_CALIBRATION_THRESHOLD_TIGHT;
+
     uint8_t nProbeRetryCount = eeprom_read_byte((uint8_t*)EEPROM_MBL_PROBE_NR);
     if (uint8_t codeSeen = code_seen('C'), value = code_value_uint8(); codeSeen && value >= 1 && value <= 10)
       nProbeRetryCount = value;
@@ -2766,8 +2771,11 @@ static void gcode_G80()
     st_synchronize();
     static uint8_t g80_fail_cnt = 0;
     if (mesh_point != MESH_NUM_X_POINTS * MESH_NUM_Y_POINTS) {
-        if (g80_fail_cnt++ >= 2) {
-            kill(_T(MSG_MBL_FAILED_Z_CAL));
+        if (g80_fail_cnt++ >= 1) {
+            print_stop();
+            lcd_show_fullscreen_message_and_wait_P(_T(MSG_MBL_FAILED));
+            lcd_z_calibration_prompt(false);
+            goto exit;
         }
         Sound_MakeSound(e_SOUND_TYPE_StandardAlert);
         bool bState;
@@ -2812,44 +2820,47 @@ static void gcode_G80()
 #endif
     babystep_apply(); // Apply Z height correction aka baby stepping before mesh bed leveing gets activated.
 
-    // Apply the bed level correction to the mesh
-    bool eeprom_bed_correction_valid = eeprom_read_byte((unsigned char*)EEPROM_BED_CORRECTION_VALID) == 1;
-    auto bedCorrectHelper = [eeprom_bed_correction_valid] (char code, uint8_t *eep_address) -> int8_t {
-        if (code_seen(code)) {
-            // Verify value is within allowed range
-            int16_t temp = code_value_short();
-            if (abs(temp) > BED_ADJUSTMENT_UM_MAX) {
-                printf_P(PSTR("%SExcessive bed leveling correction: %i microns\n"), errormagic, temp);
-            } else {
-                return (int8_t)temp; // Value is valid, use it
+    { // Apply the bed level correction to the mesh
+        bool eeprom_bed_correction_valid = eeprom_read_byte((unsigned char*)EEPROM_BED_CORRECTION_VALID) == 1;
+        auto bedCorrectHelper = [eeprom_bed_correction_valid] (char code, uint8_t *eep_address) -> int8_t {
+            if (code_seen(code)) {
+                // Verify value is within allowed range
+                int16_t temp = code_value_short();
+                if (abs(temp) > BED_ADJUSTMENT_UM_MAX) {
+                    printf_P(PSTR("%SExcessive bed leveling correction: %i microns\n"), errormagic, temp);
+                } else {
+                    return (int8_t)temp; // Value is valid, use it
+                }
+            } else if (eeprom_bed_correction_valid) {
+                return (int8_t)eeprom_read_byte(eep_address);
+            }
+            return 0;
+        };
+        const int8_t correction[4] = {
+            bedCorrectHelper('L', (uint8_t*)EEPROM_BED_CORRECTION_LEFT),
+            bedCorrectHelper('R', (uint8_t*)EEPROM_BED_CORRECTION_RIGHT),
+            bedCorrectHelper('F', (uint8_t*)EEPROM_BED_CORRECTION_FRONT),
+            bedCorrectHelper('B', (uint8_t*)EEPROM_BED_CORRECTION_REAR),
+        };
+        for (uint8_t row = 0; row < MESH_NUM_Y_POINTS; row++) {
+            for (uint8_t col = 0; col < MESH_NUM_X_POINTS; col++) {
+                constexpr float scaler = 0.001f / (MESH_NUM_X_POINTS - 1);
+                mbl.z_values[row][col] += scaler * (
+                + correction[0] * (MESH_NUM_X_POINTS - 1 - col)
+                + correction[1] * col
+                + correction[2] * (MESH_NUM_Y_POINTS - 1 - row)
+                + correction[3] * row);
             }
-        } else if (eeprom_bed_correction_valid) {
-            return (int8_t)eeprom_read_byte(eep_address);
-        }
-        return 0;
-    };
-    const int8_t correction[4] = {
-        bedCorrectHelper('L', (uint8_t*)EEPROM_BED_CORRECTION_LEFT),
-        bedCorrectHelper('R', (uint8_t*)EEPROM_BED_CORRECTION_RIGHT),
-        bedCorrectHelper('F', (uint8_t*)EEPROM_BED_CORRECTION_FRONT),
-        bedCorrectHelper('B', (uint8_t*)EEPROM_BED_CORRECTION_REAR),
-    };
-    for (uint8_t row = 0; row < MESH_NUM_Y_POINTS; row++) {
-        for (uint8_t col = 0; col < MESH_NUM_X_POINTS; col++) {
-            constexpr float scaler = 0.001f / (MESH_NUM_X_POINTS - 1);
-            mbl.z_values[row][col] += scaler * (
-              + correction[0] * (MESH_NUM_X_POINTS - 1 - col)
-              + correction[1] * col
-              + correction[2] * (MESH_NUM_Y_POINTS - 1 - row)
-              + correction[3] * row);
         }
     }
 
     mbl.upsample_3x3(); //interpolation from 3x3 to 7x7 points using largrangian polynomials while using the same array z_values[iy][ix] for storing (just coppying measured data to new destination and interpolating between them)
 
-    uint8_t useMagnetCompensation = code_seen('M') ? code_value_uint8() : eeprom_read_byte((uint8_t*)EEPROM_MBL_MAGNET_ELIMINATION);
-    if (nMeasPoints == 7 && useMagnetCompensation) {
-        mbl_magnet_elimination();
+    { // apply magnet compensation
+        uint8_t useMagnetCompensation = code_seen('M') ? code_value_uint8() : eeprom_read_byte((uint8_t*)EEPROM_MBL_MAGNET_ELIMINATION);
+        if (nMeasPoints == 7 && useMagnetCompensation) {
+            mbl_magnet_elimination();
+        }
     }
 
     mbl.active = 1; //activate mesh bed leveling
@@ -2869,6 +2880,7 @@ static void gcode_G80()
         plan_buffer_line_curposXYZE(400);
     }
 #endif // !PINDA_THERMISTOR
+exit:
     KEEPALIVE_STATE(NOT_BUSY);
     // Restore custom message state
     lcd_setstatuspgm(MSG_WELCOME);
@@ -2945,9 +2957,9 @@ bool gcode_M45(bool onlyZ, int8_t verbosity_level)
 	if (lcd_calibrate_z_end_stop_manual(onlyZ))
 	{
 #endif //TMC2130
-
 		lcd_show_fullscreen_message_and_wait_P(_T(MSG_CONFIRM_NOZZLE_CLEAN));
 		if(onlyZ){
+			prompt_steel_sheet_on_bed(true);
 			lcd_display_message_fullscreen_P(_T(MSG_MEASURE_BED_REFERENCE_HEIGHT_LINE1));
 			lcd_puts_at_P(0,3,_n("1/9"));
 		}else{
@@ -2966,12 +2978,7 @@ bool gcode_M45(bool onlyZ, int8_t verbosity_level)
 		if(!onlyZ)
 		{
 			KEEPALIVE_STATE(PAUSED_FOR_USER);
-			#ifdef STEEL_SHEET
-			uint8_t result = lcd_show_multiscreen_message_yes_no_and_wait_P(_T(MSG_STEEL_SHEET_CHECK), false);
-			if(result == LCD_LEFT_BUTTON_CHOICE) {
-				lcd_show_fullscreen_message_and_wait_P(_T(MSG_REMOVE_STEEL_SHEET));
-			}
-			#endif //STEEL_SHEET
+			prompt_steel_sheet_on_bed(false);
 			lcd_show_fullscreen_message_and_wait_P(_T(MSG_PAPER));
 			KEEPALIVE_STATE(IN_HANDLER);
 			lcd_display_message_fullscreen_P(_T(MSG_FIND_BED_OFFSET_AND_SKEW_LINE1));

Firmware/messages.cpp

@@ -125,6 +125,7 @@ const char MSG_SILENT[] PROGMEM_I1 = ISTR("Silent"); ////MSG_SILENT c=7
 const char MSG_NORMAL[] PROGMEM_I1 = ISTR("Normal"); ////MSG_NORMAL c=7
 const char MSG_STEALTH[] PROGMEM_I1 = ISTR("Stealth"); ////MSG_STEALTH c=7
 const char MSG_STEEL_SHEET_CHECK[] PROGMEM_I1 = ISTR("Is steel sheet on heatbed?"); ////MSG_STEEL_SHEET_CHECK c=20 r=3
+const char MSG_Z_CALIBRATION_PROMPT[] PROGMEM_I1 = ISTR("Z calibration recommended. Run it now?"); ////MSG_Z_CALIBRATION_PROMPT c=20 r=3
 const char MSG_STOP_PRINT[] PROGMEM_I1 = ISTR("Stop print"); ////MSG_STOP_PRINT c=18
 const char MSG_STOPPED[] PROGMEM_I1 = ISTR("STOPPED."); ////MSG_STOPPED c=20
 const char MSG_PINDA_CALIBRATION[] PROGMEM_I1 = ISTR("PINDA cal."); ////MSG_PINDA_CALIBRATION c=13
@@ -211,7 +212,7 @@ extern const char MSG_CHANGED_PRINTER [] PROGMEM_I1 = ISTR("Warning: printer typ
 extern const char MSG_CHANGED_BOTH [] PROGMEM_I1 = ISTR("Warning: both printer type and motherboard type changed."); ////MSG_CHANGED_BOTH c=20 r=4
 extern const char MSG_DEFAULT_SETTINGS_LOADED [] PROGMEM_I1 = ISTR("Old settings found. Default PID, Esteps etc. will be set."); ////MSG_DEFAULT_SETTINGS_LOADED c=20 r=6
 extern const char MSG_FORCE_SELFTEST [] PROGMEM_I1 = ISTR("Selftest will be run to calibrate accurate sensorless rehoming."); ////MSG_FORCE_SELFTEST c=20 r=8
-extern const char MSG_MBL_FAILED_Z_CAL [] PROGMEM_I1 = ISTR("Mesh bed leveling failed. Please run Z calibration."); ////MSG_MBL_FAILED_Z_CAL c=20 r=4
+extern const char MSG_MBL_FAILED [] PROGMEM_I1 = ISTR("Mesh bed leveling failed. Print canceled."); ////MSG_MBL_FAILED c=20 r=4
 extern const char MSG_ZLEVELING_ENFORCED [] PROGMEM_I1 = ISTR("Some problem encountered, Z-leveling enforced ..."); ////MSG_ZLEVELING_ENFORCED c=20 r=4
 extern const char MSG_UNLOAD_SUCCESSFUL [] PROGMEM_I1 = ISTR("Was filament unload successful?"); ////MSG_UNLOAD_SUCCESSFUL c=20 r=3
 extern const char MSG_CHECK_IDLER [] PROGMEM_I1 = ISTR("Please open idler and remove filament manually."); ////MSG_CHECK_IDLER c=20 r=4

Firmware/messages.h

@@ -127,6 +127,7 @@ extern const char MSG_SILENT[];
 extern const char MSG_NORMAL[];
 extern const char MSG_STEALTH[];
 extern const char MSG_STEEL_SHEET_CHECK[];
+extern const char MSG_Z_CALIBRATION_PROMPT[];
 extern const char MSG_STOP_PRINT[];
 extern const char MSG_STOPPED[];
 extern const char MSG_PINDA_CALIBRATION[];
@@ -210,7 +211,7 @@ extern const char MSG_CHANGED_PRINTER [];
 extern const char MSG_CHANGED_BOTH [];
 extern const char MSG_DEFAULT_SETTINGS_LOADED [];
 extern const char MSG_FORCE_SELFTEST [];
-extern const char MSG_MBL_FAILED_Z_CAL [];
+extern const char MSG_MBL_FAILED [];
 extern const char MSG_ZLEVELING_ENFORCED [];
 extern const char MSG_UNLOAD_SUCCESSFUL [];
 extern const char MSG_CHECK_IDLER [];

Firmware/ultralcd.cpp

@@ -3748,6 +3748,22 @@ static void wizard_lay1cal_message(bool cold)
             _T(MSG_WIZARD_V2_CAL_2));
 }
 
+void lcd_z_calibration_prompt(bool allowTimeouting) {
+    uint8_t result = lcd_show_multiscreen_message_yes_no_and_wait_P(_T(MSG_Z_CALIBRATION_PROMPT), allowTimeouting, 0);
+    if (result == LCD_LEFT_BUTTON_CHOICE) {
+        lcd_mesh_calibration_z();
+    }
+}
+
+void prompt_steel_sheet_on_bed(bool wantedState) {
+#ifdef STEEL_SHEET
+    bool sheetIsOnBed = !lcd_show_multiscreen_message_yes_no_and_wait_P(_T(MSG_STEEL_SHEET_CHECK), false, !wantedState);
+    if (sheetIsOnBed != wantedState) {
+        lcd_show_fullscreen_message_and_wait_P(_T(wantedState ? MSG_PLACE_STEEL_SHEET : MSG_REMOVE_STEEL_SHEET));
+    }
+#endif //STEEL_SHEET
+}
+
 //! @brief Printer first run wizard (Selftest and calibration)
 //!
 //!
@@ -3865,10 +3881,6 @@ void lcd_wizard(WizState state)
 		case S::Z:
 			lcd_show_fullscreen_message_and_wait_P(_T(MSG_REMOVE_SHIPPING_HELPERS));
 			lcd_show_fullscreen_message_and_wait_P(_T(MSG_REMOVE_TEST_PRINT));
-			wizard_event = lcd_show_multiscreen_message_yes_no_and_wait_P(_T(MSG_STEEL_SHEET_CHECK), false);
-			if (wizard_event == LCD_MIDDLE_BUTTON_CHOICE) {
-				lcd_show_fullscreen_message_and_wait_P(_T(MSG_PLACE_STEEL_SHEET));
-			}
 			lcd_show_fullscreen_message_and_wait_P(_T(MSG_WIZARD_Z_CAL));
 			wizard_event = gcode_M45(true, 0);
 			if (!wizard_event) {
@@ -5533,10 +5545,16 @@ static void lcd_mesh_bed_leveling_settings()
 
 	bool magnet_elimination = (eeprom_read_byte((uint8_t*)EEPROM_MBL_MAGNET_ELIMINATION) > 0);
 	uint8_t points_nr = eeprom_read_byte((uint8_t*)EEPROM_MBL_POINTS_NR);
-    uint8_t mbl_z_probe_nr = eeprom_read_byte((uint8_t*)EEPROM_MBL_PROBE_NR);
+	uint8_t mbl_z_probe_nr = eeprom_read_byte((uint8_t*)EEPROM_MBL_PROBE_NR);
 	char sToggle[4]; //enough for nxn format
 
 	MENU_BEGIN();
+	ON_MENU_LEAVE(
+		// Prompt user to run Z calibration for best results with region MBL.
+		if (points_nr == 7) {
+            lcd_z_calibration_prompt(true);
+		}
+	);
 	MENU_ITEM_BACK_P(_T(MSG_SETTINGS));
 	sToggle[0] = points_nr + '0';
 	sToggle[1] = 'x';

Firmware/ultralcd.h

@@ -220,6 +220,9 @@ void lcd_temp_calibration_set();
 void lcd_language();
 #endif
 
+void lcd_z_calibration_prompt(bool allowTimeouting);
+void prompt_steel_sheet_on_bed(bool wantedState);
+
 void lcd_wizard();
 
 //! @brief Wizard state

lang/po/Firmware.pot

@@ -1203,9 +1203,9 @@ msgstr ""
 msgid "Mesh Bed Leveling"
 msgstr ""
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
+msgid "Mesh bed leveling failed. Print canceled."
 msgstr ""
 
 #. MSG_MODE c=6
@@ -2452,6 +2452,11 @@ msgstr ""
 msgid "You can always resume the Wizard from Calibration -> Wizard."
 msgstr ""
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr ""
+
 #. MSG_Z_CORRECTION c=13
 #: ../../Firmware/messages.cpp:306 ../../Firmware/ultralcd.cpp:3988
 msgid "Z-correct"

lang/po/Firmware_cs.po

@@ -2551,10 +2551,10 @@ msgstr "Výměna filamentu M600. Vložte nový filament nebo vysuňte starý."
 msgid "Sensitivity"
 msgstr "Citlivost"
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
-msgstr "Mesh Bed Leveling selhal. Spusťte kalibraci osy Z."
+msgid "Mesh bed leveling failed. Print canceled."
+msgstr "Mesh Bed Leveling selhal. Tisk zrušen."
 
 #. MSG_SET_READY c=18
 #: ../../Firmware/messages.cpp:105 ../../Firmware/ultralcd.cpp:5265
@@ -2602,6 +2602,11 @@ msgstr "Není vložen filament. Pokračovat?"
 msgid "There is no filament loaded. Print cancelled."
 msgstr "Není vložen filament. Tisk zrušen."
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr "Doporučujeme kalibraci osy Z. Spustit nyní?"
+
 #~ msgid "Remove old filament and press the knob to start loading new filament."
 #~ msgstr "Vyjmete stary filament a stisknete tlacitko pro zavedeni noveho."
 

lang/po/Firmware_de.po

@@ -2579,10 +2579,10 @@ msgstr ""
 msgid "Sensitivity"
 msgstr "Sensitivität"
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
-msgstr "MeshBett Ausgleich fehlgeschlagen. Z Kalibrierung ausführen."
+msgid "Mesh bed leveling failed. Print canceled."
+msgstr "MeshBett Ausgleich fehlgeschlagen. Druck abgebrochen."
 
 #. MSG_SET_READY c=18
 #: ../../Firmware/messages.cpp:105 ../../Firmware/ultralcd.cpp:5265
@@ -2630,6 +2630,11 @@ msgstr "Kein Filament geladen. Fortfahren?"
 msgid "There is no filament loaded. Print cancelled."
 msgstr "Kein Filament geladen. Druck abgebrochen."
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr "Z-Kalibrierung empfohlen. Jetzt ausführen?"
+
 #~ msgid "Remove old filament and press the knob to start loading new filament."
 #~ msgstr "Entferne das alte Fil. und drücke den Knopf, um das neue zu laden."
 

lang/po/Firmware_es.po

@@ -2574,10 +2574,10 @@ msgstr ""
 msgid "Sensitivity"
 msgstr "Sensibilidad"
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
-msgstr "Nivelación fallida. Ejecute la calibración Z."
+msgid "Mesh bed leveling failed. Print canceled."
+msgstr "Nivelación fallida. Impresión cancelada."
 
 #. MSG_SET_READY c=18
 #: ../../Firmware/messages.cpp:105 ../../Firmware/ultralcd.cpp:5265
@@ -2625,6 +2625,11 @@ msgstr "No hay ningún filamento cargado. ¿Continuar?"
 msgid "There is no filament loaded. Print cancelled."
 msgstr "No hay ningún filamento cargado. Impresión cancelada."
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr "Se recomienda calibrar Z. ¿Ejecutarlo ahora?"
+
 #~ msgid "Remove old filament and press the knob to start loading new filament."
 #~ msgstr ""
 #~ "Retira el fil. viejo y presiona el dial para comenzar a cargar el nuevo."

lang/po/Firmware_fr.po

@@ -2586,10 +2586,10 @@ msgstr ""
 msgid "Sensitivity"
 msgstr "Sensibilité"
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
-msgstr "Mesh bed leveling a échoué. Veuillez procéder à l'étalonnage Z."
+msgid "Mesh bed leveling failed. Print canceled."
+msgstr "Mesh bed leveling a échoué. Impression annulée."
 
 #. MSG_SET_READY c=18
 #: ../../Firmware/messages.cpp:105 ../../Firmware/ultralcd.cpp:5265
@@ -2637,6 +2637,11 @@ msgstr "Il n'y a pas de filament chargé. Continuer?"
 msgid "There is no filament loaded. Print cancelled."
 msgstr "Il n'y a pas de filament chargé. Impression annulée."
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr "Calibrage Z recommandé. Exécuter maintenant?"
+
 #~ msgid "Remove old filament and press the knob to start loading new filament."
 #~ msgstr ""
 #~ "Retirez l'ancien fil. puis appuyez sur le bouton pour charger le nouveau."

lang/po/Firmware_hr.po

@@ -2568,10 +2568,10 @@ msgstr "Promjena filamenta M600. Stavite novu nit ili izbacite staru."
 msgid "Sensitivity"
 msgstr "Osjetljivost"
 
-#. MSG_MBL_FAILED_Z_CAL c=20 r=4
+#. MSG_MBL_FAILED c=20 r=4
 #: ../../Firmware/Marlin_main.cpp:3038 ../../Firmware/messages.cpp:203
-msgid "Mesh bed leveling failed. Please run Z calibration."
-msgstr "Niveliranje podloge nije uspijelo. Pokrenite Z kalibraciju."
+msgid "Mesh bed leveling failed. Print canceled."
+msgstr "Niveliranje podloge nije uspijelo. Print je otkazan."
 
 #. MSG_SET_READY c=18
 #: ../../Firmware/messages.cpp:105 ../../Firmware/ultralcd.cpp:5265
@@ -2619,6 +2619,11 @@ msgstr "Nema umetnute niti. Nastavite?"
 msgid "There is no filament loaded. Print cancelled."
 msgstr "Nema umetnute niti. Print je otkazan."
 
+#. MSG_Z_CALIBRATION_PROMPT c=20 r=3
+#: ../../Firmware/messages.cpp:128 ../../Firmware/ultralcd.cpp:3752
+msgid "Z calibration recommended. Run it now?"
+msgstr "Preporuča se Z kalibracija. Pokrenuti ga sada?"
+
 #~ msgid "Remove old filament and press the knob to start loading new filament."
 #~ msgstr "Uklonite stari fil. i pritisnite gumb za pocetak stavljanja novog."