Duet 2 WiFi - Mesh Grid Heightmap Too High

[tec_bamm]

Hello once again to readers!

I've run a mesh grid heightmap on a small portion of my "fake bed" (which is a flat block of MDF), and I seem to get a result that is super high from the axis. I don''t entirely know whether this is a G-Code problem, or a BLTouch positioning problem. Is this able to be fixed at all, like offsetting, or would I need to physically adjust something?

[LHelge]

I had the same problem when I used G92 Z0 for Z homing instead of G31

[Phaedrux]

It would help to know some more information.

What firmware version?
Can you post your config.g and homing files?
Does the BLTouch function as expected otherwise?
Other details about the printer.

[tjb1]

Do you use your BLTouch for homing the Z axis also? If so, did you home the Z axis while the bed was cold and then probe while hot?