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-rw-r--r--docs/Manual_Level.md7
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/Manual_Level.md b/docs/Manual_Level.md
index 3ae75447..a50e6daf 100644
--- a/docs/Manual_Level.md
+++ b/docs/Manual_Level.md
@@ -191,3 +191,10 @@ it has an X or Y offset) then note that adjusting the bed tilt will
invalidate any previous probe calibration that was performed with a
tilted bed. Be sure to run [probe calibration](Probe_Calibrate.md)
after the bed screws have been adjusted.
+
+The `MAX_DEVIATION` parameter is useful when a saved bed mesh is used,
+to ensure that the bed level has not drifted too far from where it was when
+the mesh was created. For example, `SCREWS_TILT_CALCULATE MAX_DEVIATION=0.01`
+can be added to the custom start gcode of the slicer before the mesh is loaded.
+It will abort the print if the configured limit is exceeded (0.01mm in this
+example), giving the user a chance to adjust the screws and restart the print.