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diff --git a/Marlin/src/feature/z_stepper_align.cpp b/Marlin/src/feature/z_stepper_align.cpp
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+++ b/Marlin/src/feature/z_stepper_align.cpp
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * feature/z_stepper_align.cpp
+ */
+
+#include "../inc/MarlinConfigPre.h"
+
+#if ENABLED(Z_STEPPER_AUTO_ALIGN)
+
+#include "z_stepper_align.h"
+#include "../module/probe.h"
+
+ZStepperAlign z_stepper_align;
+
+xy_pos_t ZStepperAlign::xy[NUM_Z_STEPPER_DRIVERS];
+
+#if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+  xy_pos_t ZStepperAlign::stepper_xy[NUM_Z_STEPPER_DRIVERS];
+#endif
+
+void ZStepperAlign::reset_to_default() {
+  #ifdef Z_STEPPER_ALIGN_XY
+
+    constexpr xy_pos_t xy_init[] = Z_STEPPER_ALIGN_XY;
+    static_assert(COUNT(xy_init) == NUM_Z_STEPPER_DRIVERS,
+      "Z_STEPPER_ALIGN_XY requires "
+      #if NUM_Z_STEPPER_DRIVERS == 4
+        "four {X,Y} entries (Z, Z2, Z3, and Z4)."
+      #elif NUM_Z_STEPPER_DRIVERS == 3
+        "three {X,Y} entries (Z, Z2, and Z3)."
+      #else
+        "two {X,Y} entries (Z and Z2)."
+      #endif
+    );
+
+    #define VALIDATE_ALIGN_POINT(N) static_assert(N >= NUM_Z_STEPPER_DRIVERS || Probe::build_time::can_reach(xy_init[N]), \
+      "Z_STEPPER_ALIGN_XY point " STRINGIFY(N) " is not reachable with the default NOZZLE_TO_PROBE offset and PROBING_MARGIN.")
+    VALIDATE_ALIGN_POINT(0); VALIDATE_ALIGN_POINT(1); VALIDATE_ALIGN_POINT(2); VALIDATE_ALIGN_POINT(3);
+
+  #else // !Z_STEPPER_ALIGN_XY
+
+    const xy_pos_t xy_init[] = {
+      #if NUM_Z_STEPPER_DRIVERS >= 3  // First probe point...
+        #if !Z_STEPPERS_ORIENTATION
+          { probe.min_x(), probe.min_y() }, // SW
+        #elif Z_STEPPERS_ORIENTATION == 1
+          { probe.min_x(), probe.max_y() }, // NW
+        #elif Z_STEPPERS_ORIENTATION == 2
+          { probe.max_x(), probe.max_y() }, // NE
+        #elif Z_STEPPERS_ORIENTATION == 3
+          { probe.max_x(), probe.min_y() }, // SE
+        #else
+          #error "Z_STEPPERS_ORIENTATION must be from 0 to 3 (first point SW, NW, NE, SE)."
+        #endif
+        #if NUM_Z_STEPPER_DRIVERS == 4    // 3 more points...
+          #if !Z_STEPPERS_ORIENTATION
+            { probe.min_x(), probe.max_y() }, { probe.max_x(), probe.max_y() }, { probe.max_x(), probe.min_y() }  // SW
+          #elif Z_STEPPERS_ORIENTATION == 1
+            { probe.max_x(), probe.max_y() }, { probe.max_x(), probe.min_y() }, { probe.min_x(), probe.min_y() }  // NW
+          #elif Z_STEPPERS_ORIENTATION == 2
+            { probe.max_x(), probe.min_y() }, { probe.min_x(), probe.min_y() }, { probe.min_x(), probe.max_y() }  // NE
+          #elif Z_STEPPERS_ORIENTATION == 3
+            { probe.min_x(), probe.min_y() }, { probe.min_x(), probe.max_y() }, { probe.max_x(), probe.max_y() }  // SE
+          #endif
+        #elif !Z_STEPPERS_ORIENTATION     // or 2 more points...
+          { probe.max_x(), probe.min_y() }, { X_CENTER, probe.max_y() } // SW
+        #elif Z_STEPPERS_ORIENTATION == 1
+          { probe.min_x(), probe.min_y() }, { probe.max_x(), Y_CENTER } // NW
+        #elif Z_STEPPERS_ORIENTATION == 2
+          { probe.min_x(), probe.max_y() }, { X_CENTER, probe.min_y() } // NE
+        #elif Z_STEPPERS_ORIENTATION == 3
+          { probe.max_x(), probe.max_y() }, { probe.min_x(), Y_CENTER } // SE
+        #endif
+      #elif Z_STEPPERS_ORIENTATION
+        { X_CENTER, probe.min_y() }, { X_CENTER, probe.max_y() }
+      #else
+        { probe.min_x(), Y_CENTER }, { probe.max_x(), Y_CENTER }
+      #endif
+    };
+
+  #endif // !Z_STEPPER_ALIGN_XY
+
+  COPY(xy, xy_init);
+
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    constexpr xy_pos_t stepper_xy_init[] = Z_STEPPER_ALIGN_STEPPER_XY;
+    static_assert(
+      COUNT(stepper_xy_init) == NUM_Z_STEPPER_DRIVERS,
+      "Z_STEPPER_ALIGN_STEPPER_XY requires "
+      #if NUM_Z_STEPPER_DRIVERS == 4
+        "four {X,Y} entries (Z, Z2, Z3, and Z4)."
+      #elif NUM_Z_STEPPER_DRIVERS == 3
+        "three {X,Y} entries (Z, Z2, and Z3)."
+      #endif
+    );
+    COPY(stepper_xy, stepper_xy_init);
+  #endif
+}
+
+#endif // Z_STEPPER_AUTO_ALIGN