Function for decision if we have valid Z-calibration data in eeprom fixed, mesh bed leveling: possible crash fix, temporaty debug info on serial line.

Firmware/Marlin_main.cpp

@@ -4438,7 +4438,10 @@ if((eSoundMode==e_SOUND_MODE_LOUD)||(eSoundMode==e_SOUND_MODE_ONCE))
 		    bool clamped = world2machine_clamp(current_position[X_AXIS], current_position[Y_AXIS]);
 			clamped ? SERIAL_PROTOCOLPGM("First calibration point clamped.\n") : SERIAL_PROTOCOLPGM("No clamping for first calibration point.\n");
 		}
-		#endif //SUPPORT_VERBOSITY          
+		#else //SUPPORT_VERBOSITY
+			world2machine_clamp(current_position[X_AXIS], current_position[Y_AXIS]);
+		#endif //SUPPORT_VERBOSITY
+
 		plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], homing_feedrate[X_AXIS] / 30, active_extruder);
 		// Wait until the move is finished.
 		st_synchronize();
@@ -4475,21 +4478,24 @@ if((eSoundMode==e_SOUND_MODE_LOUD)||(eSoundMode==e_SOUND_MODE_ONCE))
 				uint16_t z_offset_u = 0;
 				if (nMeasPoints == 7) {
 					z_offset_u = eeprom_read_word((uint16_t*)(EEPROM_BED_CALIBRATION_Z_JITTER + 2 * ((ix/3) + iy - 1)));
+					printf_P(PSTR("[%d;%d]: Z_offset = %d \n"), ix, iy, z_offset_u);
 				}
 				else {
 					z_offset_u = eeprom_read_word((uint16_t*)(EEPROM_BED_CALIBRATION_Z_JITTER + 2 * (ix + iy * 3 - 1)));
+					printf_P(PSTR("[%d;%d]: Z_offset = %d \n"), ix, iy, z_offset_u);
 				}
 				z0 = mbl.z_values[0][0] + *reinterpret_cast<int16_t*>(&z_offset_u) * 0.01;
-				#ifdef SUPPORT_VERBOSITY
-				if (verbosity_level >= 1) {
+				//#ifdef SUPPORT_VERBOSITY
+				//if (verbosity_level >= 1) {
 					printf_P(PSTR("Bed leveling, point: %d, calibration Z stored in eeprom: %d, calibration z: %f \n"), mesh_point, z_offset_u, z0);
-				}
-				#endif // SUPPORT_VERBOSITY
+				//}
+				//#endif // SUPPORT_VERBOSITY
 			}
 
 			// Move Z up to MESH_HOME_Z_SEARCH.
 			if((ix == 0) && (iy == 0)) current_position[Z_AXIS] = MESH_HOME_Z_SEARCH;
 			else current_position[Z_AXIS] += 2.f / nMeasPoints; //use relative movement from Z coordinate where PINDa triggered on previous point. This makes calibration faster.
+			float init_z_bckp = current_position[Z_AXIS];
 			plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], Z_LIFT_FEEDRATE, active_extruder);
 			st_synchronize();
 
@@ -4497,43 +4503,48 @@ if((eSoundMode==e_SOUND_MODE_LOUD)||(eSoundMode==e_SOUND_MODE_ONCE))
 			current_position[X_AXIS] = BED_X(ix, nMeasPoints);
 			current_position[Y_AXIS] = BED_Y(iy, nMeasPoints);
 
-			//printf_P(PSTR("[%f;%f]\n"), current_position[X_AXIS], current_position[Y_AXIS]);
+			printf_P(PSTR("[%f;%f]\n"), current_position[X_AXIS], current_position[Y_AXIS]);
 
-			world2machine_clamp(current_position[X_AXIS], current_position[Y_AXIS]);
+			
 			#ifdef SUPPORT_VERBOSITY
 			if (verbosity_level >= 1) {
-
+				clamped = world2machine_clamp(current_position[X_AXIS], current_position[Y_AXIS]);
 				SERIAL_PROTOCOL(mesh_point);
 				clamped ? SERIAL_PROTOCOLPGM(": xy clamped.\n") : SERIAL_PROTOCOLPGM(": no xy clamping\n");
 			}
+			#else //SUPPORT_VERBOSITY
+				world2machine_clamp(current_position[X_AXIS], current_position[Y_AXIS]);
 			#endif // SUPPORT_VERBOSITY
 
+			printf_P(PSTR("after clamping: [%f;%f]\n"), current_position[X_AXIS], current_position[Y_AXIS]);
 			plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], XY_AXIS_FEEDRATE, active_extruder);
 			st_synchronize();
 
 			// Go down until endstop is hit
 			const float Z_CALIBRATION_THRESHOLD = 1.f;
 			if (!find_bed_induction_sensor_point_z((has_z && mesh_point > 0) ? z0 - Z_CALIBRATION_THRESHOLD : -10.f, nProbeRetry)) { //if we have data from z calibration max allowed difference is 1mm for each point, if we dont have data max difference is 10mm from initial point  
-				printf_P(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
+				//printf_P(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
+				printf_P("Point too low 1 \n");
 				break;
 			}
-			if (MESH_HOME_Z_SEARCH - current_position[Z_AXIS] < 0.1f) { //broken cable or initial Z coordinate too low. Go to MESH_HOME_Z_SEARCH and repeat last step (z-probe) again to distinguish between these two cases.
-
+			if (init_z_bckp - current_position[Z_AXIS] < 0.1f) { //broken cable or initial Z coordinate too low. Go to MESH_HOME_Z_SEARCH and repeat last step (z-probe) again to distinguish between these two cases.
+				printf_P(PSTR("Another attempt! Current Z position: %f\n"), current_position[Z_AXIS]);
 				current_position[Z_AXIS] = MESH_HOME_Z_SEARCH;
 				plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], Z_LIFT_FEEDRATE, active_extruder);
 				st_synchronize();
 
 				if (!find_bed_induction_sensor_point_z((has_z && mesh_point > 0) ? z0 - Z_CALIBRATION_THRESHOLD : -10.f, nProbeRetry)) { //if we have data from z calibration max allowed difference is 1mm for each point, if we dont have data max difference is 10mm from initial point  
-					printf_P(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
+					//printf_P(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
+					printf_P("Point too low 2 \n");
 					break;
 				}
 				if (MESH_HOME_Z_SEARCH - current_position[Z_AXIS] < 0.1f) {
-					printf_P(PSTR("Bed leveling failed. Sensor disconnected or cable broken. Waiting for reset.\n"));
+					printf_P(PSTR("Bed leveling failed. Sensor disconnected or cable broken.\n"));
 					break;
 				}
 			}
 			if (has_z && fabs(z0 - current_position[Z_AXIS]) > Z_CALIBRATION_THRESHOLD) { //if we have data from z calibration, max. allowed difference is 1mm for each point
-				printf_P(PSTR("Bed leveling failed. Sensor triggered too high. Waiting for reset.\n"));
+				printf_P(PSTR("Bed leveling failed. Sensor triggered too high.\n"));
 				break;
 			}
 			#ifdef SUPPORT_VERBOSITY

Firmware/mesh_bed_calibration.cpp

@@ -678,11 +678,13 @@ void reset_bed_offset_and_skew()
 
 bool is_bed_z_jitter_data_valid()
 // offsets of the Z heiths of the calibration points from the first point are saved as 16bit signed int, scaled to tenths of microns
-{
-    for (int8_t i = 0; i < 8; ++ i)
-        if (eeprom_read_word((uint16_t*)(EEPROM_BED_CALIBRATION_Z_JITTER+i*2)) == 0x0FFFF)
-            return false;
-    return true;
+// if at least one 16bit integer has different value then -1 (0x0FFFF), data are considered valid and function returns true, otherwise it returns false
+{	
+	bool data_valid = false;
+	for (int8_t i = 0; i < 8; ++i) {
+		if (eeprom_read_word((uint16_t*)(EEPROM_BED_CALIBRATION_Z_JITTER + i * 2)) != 0x0FFFF) data_valid = true;
+	}
+    return data_valid;
 }
 
 static void world2machine_update(const float vec_x[2], const float vec_y[2], const float cntr[2])
@@ -946,7 +948,7 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
 #ifdef TMC2130
 	FORCE_HIGH_POWER_START;
 #endif
-
+	printf_P(PSTR("Min. Z: %f\n"), minimum_z);
 	#ifdef SUPPORT_VERBOSITY
     if(verbosity_level >= 10) SERIAL_ECHOLNPGM("find bed induction sensor point z");
 	#endif // SUPPORT_VERBOSITY
@@ -961,9 +963,16 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
     // we have to let the planner know where we are right now as it is not where we said to go.
     update_current_position_z();
     if (! endstop_z_hit_on_purpose())
-        goto error;
+	{
+		printf_P(PSTR("endstop not hit 1, current_pos[Z]: %f \n"), current_position[Z_AXIS]);
+		goto error;
+	}
 #ifdef TMC2130
-	if (READ(Z_TMC2130_DIAG) != 0) goto error; //crash Z detected
+	if (READ(Z_TMC2130_DIAG) != 0)
+	{
+		printf_P(PSTR("crash detected 1, current_pos[Z]: %f \n"), current_position[Z_AXIS]);
+		goto error; //crash Z detected
+	}
 #endif //TMC2130
     for (uint8_t i = 0; i < n_iter; ++ i)
 	{
@@ -973,12 +982,13 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
 		go_to_current(homing_feedrate[Z_AXIS]/60);
 		// Move back down slowly to find bed.
         current_position[Z_AXIS] = minimum_z;
+		printf_P(PSTR("init Z = %f, min_z = %f\n"), z_bckp, minimum_z);
         go_to_current(homing_feedrate[Z_AXIS]/(4*60));
         // we have to let the planner know where we are right now as it is not where we said to go.
         update_current_position_z();
 		//printf_P(PSTR("Zs: %f, Z: %f, delta Z: %f"), z_bckp, current_position[Z_AXIS], (z_bckp - current_position[Z_AXIS]));
 		if (abs(current_position[Z_AXIS] - z_bckp) < 0.025) {
-			//printf_P(PSTR("PINDA triggered immediately, move Z higher and repeat measurement\n")); 
+			printf_P(PSTR("PINDA triggered immediately, move Z higher and repeat measurement\n")); 
 			current_position[Z_AXIS] += 0.5;
 			go_to_current(homing_feedrate[Z_AXIS]/60);
 			current_position[Z_AXIS] = minimum_z;
@@ -989,10 +999,16 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
 
 
 
-		if (! endstop_z_hit_on_purpose())
-            goto error;
+		if (!endstop_z_hit_on_purpose())
+		{
+			printf_P(PSTR("i = %d, endstop not hit 2, current_pos[Z]: %f \n"), i, current_position[Z_AXIS]);
+			goto error;
+		}
 #ifdef TMC2130
-		if (READ(Z_TMC2130_DIAG) != 0) goto error; //crash Z detected
+		if (READ(Z_TMC2130_DIAG) != 0) {
+			printf_P(PSTR("crash detected 2, current_pos[Z]: %f \n"), current_position[Z_AXIS]);
+			goto error; //crash Z detected
+		}
 #endif //TMC2130
 //        SERIAL_ECHOPGM("Bed find_bed_induction_sensor_point_z low, height: ");
 //        MYSERIAL.print(current_position[Z_AXIS], 5);
@@ -1000,7 +1016,11 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
 		float dz = i?abs(current_position[Z_AXIS] - (z / i)):0;
         z += current_position[Z_AXIS];
 		//printf_P(PSTR("Z[%d] = %d, dz=%d\n"), i, (int)(current_position[Z_AXIS] * 1000), (int)(dz * 1000));
-		if (dz > 0.05) goto error;//deviation > 50um
+		if (dz > 0.05) {
+			printf_P(PSTR("big deviation \n"));
+			goto error;//deviation > 50um
+		}
+		printf_P(PSTR("PINDA triggered at %f\n"), current_position[Z_AXIS]);
     }
     current_position[Z_AXIS] = z;
     if (n_iter > 1)