Re: Preserve UBL Mesh Between Firmware Updates

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brucehvn
Thanks Roxy. This will be very helpful.

You are welcome.

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brucehvn
So when I usually save my mesh, I do a G29 S which then says it is saving to mesh 0. So I assume the commands you listed above would be G29 L0 T and G29 S-0?

Yes. But no minus sign on the 0 Do a G29 S0

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brucehvn
What is the fade height and where is it set?

Oh! Read the documentation. Fade Height is a very powerful concept. With the Mesh Bed Leveling schemes, you can set the distance to eleminate any correction. The default for UBL is 10.0 mm. You set it with G29 F 10.0
At a layer height of 0.00 you get 100% correction added in. At a layer height of 10.0mm you get 0% correction. The correction 'Fades' as the layer height increases.

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brucehvn
If I do a M502/M500 to pull in some changed values from the configuration.h, would that wipe out the mesh, or is it still preserved?

The mesh data is preserved. (Assuming you don't change the mesh dimenstions.) It will be there. It is saved in the free space at the end of the EEPROM.