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M421 - Set Mesh Value

motion Set a single mesh Z height AUTO_BED_LEVELING_(BILINEAR|UBL)|MESH_BED_LEVELING

Description

This command is used to set a single Z value for a mesh point in the stored bed leveling data.

Allowed forms are M421 In Jn Zn, M421 Xn Yn Zn (MESH_BED_LEVELING only) or M421 C Zn (AUTO_BED_LEVELING_UBL only).

Usage

M421 [C<bool>] [I<index>] [J<index>] [N<bool>] [Q<linear>] [X<linear>] [Y<linear>] [Z<linear>]

Parameters

[C<bool>]

Set the mesh point closest to the current nozzle position (AUTO_BED_LEVELING_UBL only)

    [I<index>]

    X index into the mesh array

      [J<index>]

      Y index into the mesh array

        [N<bool>]

        Set the mesh point to undefined (AUTO_BED_LEVELING_UBL only)

          [Q<linear>]

          A value to add to the existing Z value

            [X<linear>]

            X position (which should be very close to a grid line) (MESH_BED_LEVELING only)

              [Y<linear>]

              Y position (which should be very close to a grid line) (MESH_BED_LEVELING only)

                [Z<linear>]

                The new Z value to set

                  Examples

                  Set the Z height in the middle of a 5x5 grid

                  M421 I2 J2 Z-0.05

                  Set the same Z height using XY

                  M421 X100 Y100 Z-0.05

                  Adjust the mesh point by -0.01

                  M421 I2 J2 Q-0.01