Z_STEPPER_AUTO_ALIGN — To align with Z stepper points (#15195)

config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

@@ -604,18 +604,31 @@
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
   #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+
+  // Provide Z stepper positions for more rapid convergence in bed alignment.
+  // Currently requires triple stepper drivers.
+  //#define Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS
+  #if ENABLED(Z_STEPPER_ALIGN_KNOWN_STEPPER_POSITIONS)
+    // Define Stepper XY positions for Z1, Z2, Z3 corresponding to
+    // the Z screw positions in the bed carriage.
+    // Define one position per Z stepper in stepper driver order.
+    #define Z_STEPPER_ALIGN_STEPPER_XY { { 210.7, 102.5 }, { 152.6, 220.0 }, { 94.5, 102.5 } }
+  #else
+    // Amplification factor. Used to scale the correction step up or down.
+    // In case the stepper (spindle) position is further out than the test point.
+    // Use a value > 1. NOTE: This may cause instability
+    #define Z_STEPPER_ALIGN_AMP 1.0
+  #endif
+
   // Set number of iterations to align
   #define Z_STEPPER_ALIGN_ITERATIONS 3
+
   // Enable to restore leveling setup after operation
   #define RESTORE_LEVELING_AFTER_G34
 
   // On a 300mm bed a 5% grade would give a misalignment of ~1.5cm
   #define G34_MAX_GRADE  5  // (%) Maximum incline G34 will handle
 
-  // Use the amplification factor to de-/increase correction step.
-  // In case the stepper (spindle) position is further out than the test point
-  // Use a value > 1. NOTE: This may cause instability
-  #define Z_STEPPER_ALIGN_AMP 1.0
   // Stop criterion. If the accuracy is better than this stop iterating early
   #define Z_STEPPER_ALIGN_ACC 0.02
 #endif