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Table of Contents
How to run a Bed Mesh
Defining the Bed Mesh
We have to have the bed mesh parameter's define before running a bed mes. They are stored in printer.cfg
Example for Neptune 4 and Neptune 4 Pro:
[bed_mesh] mesh_min:10,21 mesh_max:210,211 probe_count: 9,9 algorithm:bicubic bicubic_tension:0.2 mesh_pps: 4, 4 split_delta_z: 0.020 fade_start: 4 fade_end: 12
Full bed meshes aren't useful for production printing because they are stale almost immediately, yet they are useful to evaluate the shape of the bed. Having a large probe matrix, such as the Elegoo “Professional” size bed mesh, isn't going to tell us significantly more about the overall bed shape than a 6×6 or 9×9 mesh in less time. We'll want to be using Adaptive Bed Meshes run at print time for production prints and they'll have a denser mesh for just the object size.
Note: the G29 gocode is a marlin gcode and not an actual gcode in Klipper], it's implemented as a [[macro. Klipper instead implements the BED_MESH_CALIBRATE command. As such consider using G29 instead of the Klipper command as unreliable and unpredictable as its behavior may change.
Full Bed Mesh
Run the following in the console to generate a full bed mesh that you can use to evaluate how flat the bed is compared to the bed level.
BED_MESH_CLEAR BED_MESH_CALIBRATE
Adaptive Bed Meshes
Use the following in Orca's Printer Machine Start gcode:
BED_MESH_CALIBRATE mesh_min={adaptive_bed_mesh_min[0]},{adaptive_bed_mesh_min[1]} mesh_max={adaptive_bed_mesh_max[0]},{adaptive_bed_mesh_max[1]} ALGORITHM=[bed_mesh_algo] PROBE_COUNT={bed_mesh_probe_count[0]},{bed_mesh_probe_count[1]} ADAPTIVE=0 ADAPTIVE_MARGIN=0
Read the Orca docs on Direct Adaptive Bed Mesh Compensation