✨ Z_PROBE_ERROR_TOLERANCE

MarlinFirmware/Marlin#26229
MarlinFirmware · Oct 12, 2023 · c6e6b84 · c6e6b84
1 parent 0e94d88
commit c6e6b84
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diff --git a/config/default/Configuration.h b/config/default/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/3DFabXYZ/Migbot/Configuration.h b/config/examples/3DFabXYZ/Migbot/Configuration.h
@@ -1652,16 +1652,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE    5 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  3 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE    5 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  3 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/ADIMLab/Gantry v1/Configuration.h b/config/examples/ADIMLab/Gantry v1/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/ADIMLab/Gantry v2/Configuration.h b/config/examples/ADIMLab/Gantry v2/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Alfawise/U20-bltouch/Configuration.h b/config/examples/Alfawise/U20-bltouch/Configuration.h
@@ -1719,16 +1719,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 #define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Alfawise/U20/Configuration.h b/config/examples/Alfawise/U20/Configuration.h
@@ -1720,16 +1720,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/AliExpress/CL-260/Configuration.h b/config/examples/AliExpress/CL-260/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/AliExpress/UM2pExt/Configuration.h b/config/examples/AliExpress/UM2pExt/Configuration.h
@@ -1651,16 +1651,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Anet/A2/Configuration.h b/config/examples/Anet/A2/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Anet/A2plus/Configuration.h b/config/examples/Anet/A2plus/Configuration.h
@@ -1650,16 +1650,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Anet/A6/Configuration.h b/config/examples/Anet/A6/Configuration.h
@@ -1682,21 +1682,22 @@
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
 #if 1 // 0 for less clearance
-  #define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-  #define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
+  #define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+  #define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
 #else
-  #define Z_CLEARANCE_DEPLOY_PROBE    5 // Z Clearance for Deploy/Stow
-  #define Z_CLEARANCE_BETWEEN_PROBES  3 // Z Clearance between probe points
+  #define Z_CLEARANCE_DEPLOY_PROBE    5 // (mm) Z Clearance for Deploy/Stow
+  #define Z_CLEARANCE_BETWEEN_PROBES  3 // (mm) Z Clearance between probe points
 #endif
 
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Anet/A8/Configuration.h b/config/examples/Anet/A8/Configuration.h
@@ -1653,16 +1653,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST

diff --git a/config/examples/Anet/A8plus/Configuration.h b/config/examples/Anet/A8plus/Configuration.h
@@ -1652,16 +1652,17 @@
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
-#define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
-//#define Z_AFTER_PROBING           5 // Z position after probing is done
+#define Z_CLEARANCE_DEPLOY_PROBE   10 // (mm) Z Clearance for Deploy/Stow
+#define Z_CLEARANCE_BETWEEN_PROBES  5 // (mm) Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     5 // (mm) Z Clearance between multiple probes
+#define Z_PROBE_ERROR_TOLERANCE     3 // (mm) Tolerance for early trigger (<= -probe.offset.z + ZPET)
+//#define Z_AFTER_PROBING           5 // (mm) Z position after probing is done
 
-#define Z_PROBE_LOW_POINT          -2 // Farthest distance below the trigger-point to go before stopping
+#define Z_PROBE_LOW_POINT          -2 // (mm) Farthest distance below the trigger-point to go before stopping
 
 // For M851 give a range for adjusting the Z probe offset
-#define Z_PROBE_OFFSET_RANGE_MIN -20
-#define Z_PROBE_OFFSET_RANGE_MAX 20
+#define Z_PROBE_OFFSET_RANGE_MIN  -20 // (mm)
+#define Z_PROBE_OFFSET_RANGE_MAX   20 // (mm)
 
 // Enable the M48 repeatability test to test probe accuracy
 //#define Z_MIN_PROBE_REPEATABILITY_TEST