diff --git a/docs/Bed_Mesh.md b/docs/Bed_Mesh.md
index d2a417dd4..ada3de29d 100644
--- a/docs/Bed_Mesh.md
+++ b/docs/Bed_Mesh.md
@@ -370,14 +370,68 @@ are identified in green.
+### Adaptive Meshes
+
+Adaptive bed meshing is a way to speed up the bed mesh generation by only probing
+the area of the bed used by the objects being printed. When used, the method will
+automatically adjust the mesh parameters based on the area occupied by the defined
+print objects.
+
+The adapted mesh area will be computed from the area defined by the boundaries of all
+the defined print objects so it covers every object, including any margins defined in
+the configuration. After the area is computed, the number of probe points will be
+scaled down based on the ratio of the default mesh area and the adapted mesh area. To
+illustrate this consider the following example:
+
+For a 150mmx150mm bed with `mesh_min` set to `25,25` and `mesh_max` set to `125,125`,
+the default mesh area is a 100mmx100mm square. An adapted mesh area of `50,50`
+means a ratio of `0.5x0.5` between the adapted area and default mesh area.
+
+If the `bed_mesh` configuration specified `probe_count` as `7x7`, the adapted bed
+mesh will use 4x4 probe points (7 * 0.5 rounded up).
+
+
+
+```
+[bed_mesh]
+speed: 120
+horizontal_move_z: 5
+mesh_min: 35, 6
+mesh_max: 240, 198
+probe_count: 5, 3
+adaptive_margin: 5
+```
+
+- `adaptive_margin` \
+ _Default Value: 0_ \
+ Margin (in mm) to add around the area of the bed used by the defined objects. The diagram
+ below shows the adapted bed mesh area with an `adaptive_margin` of 5mm. The adapted mesh
+ area (area in green) is computed as the used bed area (area in blue) plus the defined margin.
+
+ 
+
+By nature, adaptive bed meshes use the objects defined by the Gcode file being printed.
+Therefore, it is expected that each Gcode file will generate a mesh that probes a different
+area of the print bed. Therefore, adapted bed meshes should not be re-used. The expectation
+is that a new mesh will be generated for each print if adaptive meshing is used.
+
+It is also important to consider that adaptive bed meshing is best used on machines that can
+normally probe the entire bed and achieve a maximum variance less than or equal to 1 layer
+height. Machines with mechanical issues that a full bed mesh normally compensates for may
+have undesirable results when attempting print moves **outside** of the probed area. If a
+full bed mesh has a variance greater than 1 layer height, caution must be taken when using
+adaptive bed meshes and attempting print moves outside of the meshed area.
+
## Bed Mesh Gcodes
### Calibration
`BED_MESH_CALIBRATE PROFILE=<name> METHOD=[manual | automatic] [<probe_parameter>=<value>]
- [<mesh_parameter>=<value>]`\
+ [<mesh_parameter>=<value>] [ADAPTIVE=[0|1] [ADAPTIVE_MARGIN=<value>]`\
_Default Profile: default_\
-_Default Method: automatic if a probe is detected, otherwise manual_
+_Default Method: automatic if a probe is detected, otherwise manual_ \
+_Default Adaptive: 0_ \
+_Default Adaptive Margin: 0_
Initiates the probing procedure for Bed Mesh Calibration.
@@ -399,6 +453,8 @@ following parameters are available:
- `ROUND_PROBE_COUNT`
- All beds:
- `ALGORITHM`
+ - `ADAPTIVE`
+ - `ADAPTIVE_MARGIN`
See the configuration documentation above for details on how each parameter
applies to the mesh.
diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
index 3b2f17709..985408091 100644
--- a/docs/Config_Reference.md
+++ b/docs/Config_Reference.md
@@ -991,6 +991,9 @@ Visual Examples:
# Optional points that define a faulty region. See docs/Bed_Mesh.md
# for details on faulty regions. Up to 99 faulty regions may be added.
# By default no faulty regions are set.
+#adaptive_margin:
+# An optional margin (in mm) to be added around the bed area used by
+# the defined print objects when generating an adaptive mesh.
```
### [bed_tilt]
diff --git a/docs/img/adaptive_bed_mesh.svg b/docs/img/adaptive_bed_mesh.svg
new file mode 100644
index 000000000..954ca0b32
--- /dev/null
+++ b/docs/img/adaptive_bed_mesh.svg
@@ -0,0 +1,4 @@
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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 461px; margin-left: 216px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">(90,75)</div></div></div></foreignObject><text x="245" y="465" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">(90,75)</text></switch></g><rect x="426" y="234" width="60" height="30" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; 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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 38px; height: 1px; padding-top: 405px; margin-left: 251px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><font style="font-size: 10px;">(60,90)</font></div></div></div></foreignObject><text x="270" y="409" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">(60,90)</text></switch></g><rect x="290" y="288.5" width="40" height="9" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; 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diff --git a/klippy/extras/bed_mesh.py b/klippy/extras/bed_mesh.py
index 6c714304f..9e30846f0 100644
--- a/klippy/extras/bed_mesh.py
+++ b/klippy/extras/bed_mesh.py
@@ -1,6 +1,5 @@
# Mesh Bed Leveling
#
-# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
# Copyright (C) 2018-2019 Eric Callahan <arksine.code@gmail.com>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
@@ -291,6 +290,7 @@ class BedMeshCalibrate:
self.orig_config = {'radius': None, 'origin': None}
self.radius = self.origin = None
self.mesh_min = self.mesh_max = (0., 0.)
+ self.adaptive_margin = config.getfloat('adaptive_margin', 0.0)
self.zero_ref_pos = config.getfloatlist(
"zero_reference_position", None, count=2
)
@@ -573,6 +573,113 @@ class BedMeshCalibrate:
"interpolation. Configured Probe Count: %d, %d" %
(self.mesh_config['x_count'], self.mesh_config['y_count']))
params['algo'] = 'lagrange'
+ def set_adaptive_mesh(self, gcmd):
+ if not gcmd.get_int('ADAPTIVE', 0):
+ return False
+ exclude_objects = self.printer.lookup_object("exclude_object", None)
+ if exclude_objects is None:
+ gcmd.respond_info("Exclude objects not enabled. Using full mesh...")
+ return False
+ objects = exclude_objects.get_status().get("objects", [])
+ if not objects:
+ return False
+ margin = gcmd.get_float('ADAPTIVE_MARGIN', self.adaptive_margin)
+
+ # List all exclude_object points by axis and iterate over
+ # all polygon points, and pick the min and max or each axis
+ list_of_xs = []
+ list_of_ys = []
+ gcmd.respond_info("Found %s objects" % (len(objects)))
+ for obj in objects:
+ for point in obj["polygon"]:
+ list_of_xs.append(point[0])
+ list_of_ys.append(point[1])
+
+ # Define bounds of adaptive mesh area
+ mesh_min = [min(list_of_xs), min(list_of_ys)]
+ mesh_max = [max(list_of_xs), max(list_of_ys)]
+ adjusted_mesh_min = [x - margin for x in mesh_min]
+ adjusted_mesh_max = [x + margin for x in mesh_max]
+
+ # Force margin to respect original mesh bounds
+ adjusted_mesh_min[0] = max(adjusted_mesh_min[0],
+ self.orig_config["mesh_min"][0])
+ adjusted_mesh_min[1] = max(adjusted_mesh_min[1],
+ self.orig_config["mesh_min"][1])
+ adjusted_mesh_max[0] = min(adjusted_mesh_max[0],
+ self.orig_config["mesh_max"][0])
+ adjusted_mesh_max[1] = min(adjusted_mesh_max[1],
+ self.orig_config["mesh_max"][1])
+
+ adjusted_mesh_size = (adjusted_mesh_max[0] - adjusted_mesh_min[0],
+ adjusted_mesh_max[1] - adjusted_mesh_min[1])
+
+ # Compute a ratio between the adapted and original sizes
+ ratio = (adjusted_mesh_size[0] /
+ (self.orig_config["mesh_max"][0] -
+ self.orig_config["mesh_min"][0]),
+ adjusted_mesh_size[1] /
+ (self.orig_config["mesh_max"][1] -
+ self.orig_config["mesh_min"][1]))
+
+ gcmd.respond_info("Original mesh bounds: (%s,%s)" %
+ (self.orig_config["mesh_min"],
+ self.orig_config["mesh_max"]))
+ gcmd.respond_info("Original probe count: (%s,%s)" %
+ (self.mesh_config["x_count"],
+ self.mesh_config["y_count"]))
+ gcmd.respond_info("Adapted mesh bounds: (%s,%s)" %
+ (adjusted_mesh_min, adjusted_mesh_max))
+ gcmd.respond_info("Ratio: (%s, %s)" % ratio)
+
+ new_x_probe_count = int(
+ math.ceil(self.mesh_config["x_count"] * ratio[0]))
+ new_y_probe_count = int(
+ math.ceil(self.mesh_config["y_count"] * ratio[1]))
+
+ # There is one case, where we may have to adjust the probe counts:
+ # axis0 < 4 and axis1 > 6 (see _verify_algorithm).
+ min_num_of_probes = 3
+ if max(new_x_probe_count, new_y_probe_count) > 6 and \
+ min(new_x_probe_count, new_y_probe_count) < 4:
+ min_num_of_probes = 4
+
+ new_x_probe_count = max(min_num_of_probes, new_x_probe_count)
+ new_y_probe_count = max(min_num_of_probes, new_y_probe_count)
+
+ gcmd.respond_info("Adapted probe count: (%s,%s)" %
+ (new_x_probe_count, new_y_probe_count))
+
+ # If the adapted mesh size is too small, adjust it to something
+ # useful.
+ adjusted_mesh_size = (max(adjusted_mesh_size[0], new_x_probe_count),
+ max(adjusted_mesh_size[1], new_y_probe_count))
+
+ if self.radius is not None:
+ adapted_radius = math.sqrt((adjusted_mesh_size[0] ** 2) +
+ (adjusted_mesh_size[1] ** 2)) / 2
+ adapted_origin = (adjusted_mesh_min[0] +
+ (adjusted_mesh_size[0] / 2),
+ adjusted_mesh_min[1] +
+ (adjusted_mesh_size[1] / 2))
+ to_adapted_origin = math.sqrt(adapted_origin[0]**2 +
+ adapted_origin[1]**2)
+ # If the adapted mesh size is smaller than the default/full
+ # mesh, adjust the parameters. Otherwise, just do the full mesh.
+ if adapted_radius + to_adapted_origin < self.radius:
+ self.radius = adapted_radius
+ self.origin = adapted_origin
+ self.mesh_min = (-self.radius, -self.radius)
+ self.mesh_max = (self.radius, self.radius)
+ self.mesh_config["x_count"] = self.mesh_config["y_count"] = \
+ max(new_x_probe_count, new_y_probe_count)
+ else:
+ self.mesh_min = adjusted_mesh_min
+ self.mesh_max = adjusted_mesh_max
+ self.mesh_config["x_count"] = new_x_probe_count
+ self.mesh_config["y_count"] = new_y_probe_count
+ self._profile_name = None
+ return True
def update_config(self, gcmd):
# reset default configuration
self.radius = self.orig_config['radius']
@@ -616,6 +723,8 @@ class BedMeshCalibrate:
self.mesh_config['algo'] = gcmd.get('ALGORITHM').strip().lower()
need_cfg_update = True
+ need_cfg_update |= self.set_adaptive_mesh(gcmd)
+
if need_cfg_update:
self._verify_algorithm(gcmd.error)
self._generate_points(gcmd.error)
@@ -781,7 +890,8 @@ class BedMeshCalibrate:
z_mesh.set_zero_reference(*self.zero_ref_pos)
self.bedmesh.set_mesh(z_mesh)
self.gcode.respond_info("Mesh Bed Leveling Complete")
- self.bedmesh.save_profile(self._profile_name)
+ if self._profile_name is not None:
+ self.bedmesh.save_profile(self._profile_name)
def _dump_points(self, probed_pts, corrected_pts, offsets):
# logs generated points with offset applied, points received
# from the finalize callback, and the list of corrected points