[BUG] plugin says No Mesh, but g29 returns mesh

[whitewhidow]

Describe the bug plugin says No Mesh, but g29 returns mesh:

Send: G29 S0
Recv: Mesh Bed Leveling ON
Recv: 3x3 mesh. Z offset: 0.00000
Recv: Measured points:
Recv:         0        1        2
Recv:  0 -0.22500 +0.02500 +0.07500
Recv:  1 -0.10000 +0.07500 -0.02500
Recv:  2 +0.05000 +0.12500 -0.02500
Recv: 
Recv: X:-5.00 Y:0.00 Z:0.27 E:184.88 Count X:-400 Y:0 Z:3
Recv: ok

Mesh was set using the following : https://marlinfw.org/docs/gcode/G029-mbl.html

instead of using a probe M420 Output If this bug is related to the mesh not loading or updating properly, include the output of M420 V1 T1 including the last 'ok'.

Send: M420 V1 T1
Recv: Mesh Bed Level data:
Recv: 3x3 mesh. Z offset: 0.00000
Recv: Measured points:
Recv:         0        1        2
Recv:  0 -0.22500 +0.02500 +0.07500
Recv:  1 -0.10000 +0.07500 -0.02500
Recv:  2 +0.05000 +0.12500 -0.02500
Recv: 
Recv: echo:Bed Leveling ON
Recv: echo:Fade Height 10.00
Recv: ok

Firmware marlin 2.0.8 on mks sgen l v1

[The-EG]

Hello, I can see from the output:

Recv: Mesh Bed Level data:

And the document you linked that you are using MBL not UBL. This plugin does not support MBL.

While the two are similar, MBL has some quirks that would make supporting it much more complex and convoluted. I recommend switching to UBL with PROBE_MANUALLY instead if you'd like to use this plugin.

[whitewhidow]

Hello, I can see from the output:

Recv: Mesh Bed Level data:

And the document you linked that you are using MBL not UBL. This plugin does not support MBL.

While the two are similar, MBL has some quirks that would make supporting it much more complex and convoluted. I recommend switching to UBL with PROBE_MANUALLY instead if you'd like to use this plugin.

Could you explain this further ? switching to UBL ?" will this work the same way tho ? wont that mess things up and make it think i have an actual probe ?

thx in advance

[whitewhidow]

or can i just purely change #define MESH_BED_LEVELING to #define AUTO_BED_LEVELING_UBL will the procedure and lcd items etc remain the same ? what is the actual difference between the 2 then ? i thought one was manual and one was auto, but you say you can do both manually ? but then what is the actual diff ? also i dont see any docs regarding manual procedures on the UBL page https://marlinfw.org/docs/gcode/G029-ubl.html

as i do see on the manual page ?

[The-EG]

Yes, but you'd also need to #define PROBE_MANUALLY above in the probe section. It's not exactly the same as MBL, but the concept is the same and the commands are similar. There are some advantages to UBL, most notably a mesh that is all 0's isn't invalid and will display, and you can save multiple meshes to 'slots' that don't get erased when the EEPROM is reset.

I've detailed some of this on my blog: https://the-eg.github.io/2021/04/28/using-ubl-with-probe-manually.html The Marlin documentation also has some details on UBL usage without a probe: https://marlinfw.org/docs/features/unified_bed_leveling.html#ubl-without-a-z-probe

[whitewhidow]

ok i tried it, but with the new options, it disables ubl every time i start the machine ?

and also, the cld item that lets me manually choose a point, and then move the z with the know, jsut kleeps cycling between points, i have no option of ever finishing this or going back to the previous menu ?

[whitewhidow]

ok, so im at a point now, where the plugin reports a zero mesh and the corner discs print properly but whenever i boot the machine, it will say UBL disabled, nor do i know how to change this mesh via the lcd, without getting stuck ..

[The-EG]

You'll have to enable UBL just like you would MBL (M420 S) unless you tell it to automatically enable with G28.

I don't recall the exact defines, but there are additional options to enable LCD menus that I mention in the post I linked and the Marlin docs.

[whitewhidow]

i have all the lcd menus enabled, as thats how i did it earlier aswell, propblem is once i am in the lcd menu to manually level, i cannot finish/exit it !

i also have auto enable after g28 enabled, but it will boot with it disabled, and after a g28 it will also still be disabled

if enabled, it will re-enable after g28, but if rebooted, its disabled again