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Clarify on some requirements for adaptive meshing #6476

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Clarify on some requirements for adaptive meshing #6476

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Clarify on some requirements for adaptive meshing
kyleisah Jan 29, 2024
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Update Bed_Mesh.md
kyleisah Feb 9, 2024
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Update Bed_Mesh.md
kyleisah Feb 9, 2024
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Update Bed_Mesh.md
kyleisah Feb 9, 2024
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24 changes: 12 additions & 12 deletions docs/Bed_Mesh.md
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Expand Up @@ -372,14 +372,15 @@ 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.
Adaptive bed meshing is a way to speed up the bed meshing process as well as waste less mesh information by only probing
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What does "waste less mesh information" mean? What information is being wasted if adaptive is not being used?

Also, a nit: can you please conform to the document's line length?

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@kyleisah kyleisah Feb 10, 2024 •
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What does "waste less mesh information" mean? What information is being wasted if adaptive is not being used?

Well, if you're doing a regular full mesh for a small cube on a big bed, you're really only using 1 probed point and some interpolation rather than all of the probed points fitting to the object being printed.

Also, a nit: can you please conform to the document's line length?

I don't know what I'm doing here, I'm just trying to help out.

the area of the bed that will be used for printing. When used, this method will
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When used, this method will [...]

What I find a bit unclear today: What is the criteria, when adaptive meshing is used? Is it just the presence of [exclude_object] along with named objects in the gcode? What if I wanted to not use adaptive meshing? Would I need to turn off naming objects in the slicer or take out [exclude_object]?

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if you wanted to not use adaptive meshing, you would just call BED_MESH_CALIBRATE without the ADAPTIVE=1 flag on the command

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What I wanted to point out:

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@Sineos I've just made some updates to the bed_mesh.md for clarification on setup requirements. If this looks okay, I can move forward with making changes to the exclude_object.md about setting up object processing with moonraker.

automatically adjust the mesh parameters based on the area occupied by objects defined by the `EXCLUDE_OBJECT` command. See the [exclude objects guide](Exclude_Object.md) and
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I actually think that the old version ("area occupied by the defined print objects") was a bit better. Talking about how those objects get defined (the EXCLUDE_OBJECTS command) seem more appropriate for the "How it works" section.

[command reference](G-Codes.md#excludeobject)
for additional information.

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
the [configuration](Config_Reference.md#bed_mesh). 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:

Expand Down Expand Up @@ -410,17 +411,16 @@ adaptive_margin: 5

![adaptive_bedmesh_margin](img/adaptive_bed_mesh_margin.svg)

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
By nature, adaptive bed meshes use the objects defined by the [exclude_object](Exclude_Object.md) module in the Gcode file being printed, and 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
It is 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.
have undesirable results when attempting print moves **outside** of the probed area. If you normally have a variance greater than 1 layer height when generating a full bed mesh, greater caution must be taken when attempting print moves outside of the adapted mesh area.

If there are no objects defined by the [exclude_object](Exclude_Object.md) module before the adaptive bed mesh is requested, the default method will be used instead. If you are requesting an adaptive bed mesh and the default method is still being used, check that you have [exclude_object](Exclude_Object.md) set up correctly, and that the objects are being defined before the adaptive bed mesh command is executed in your Gcode file.
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## Bed Mesh Gcodes

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