Bed Mesh Height Being Added Onto Model Height

[zealous hazel]

Hm. What could be affecting my model height? I was printing a 20mm^3 test cube for shrinkage and elephant's foot. My sides are 19.87, so I do have some X and Y shrinkage, but...
My height is 22.58mm?
The caliper tool in Orca Slicer shows I should get 20mm.
Something is causing my model to be taller than it should be.

My bed mesh is 7x7, 3pps, and fade at 10mm. Z-offset is perfectly calibrated. However, my printer seems to be adding this initial Z value to the model height? Is it because my Z-offset is somehow not being treated as the true height or something? My deviance is below 0.2, usually 0.16 or so. I do heat soak the bed for 5 minutes before load cell taring and doing the bed mesh. Maybe adding the z-offset to Orca Slicer will help? I honestly have no clue what's going on. I just want an accurate height...

I also noticed that about 10mm up my model, the filament color gets slightly darker and the walls are ever so slightly moved inwards, no matter the model I print. This is leading me to believe something is screwy on my bed mesh settings.

[bed_mesh] speed: 120 # probing speed in mm/s horizontal_move_z: 5 # safe travel height between probe points mesh_min: -107, -107 # X_min, Y_min (probe area start; avoid edges) mesh_max: 107, 107 # X_max, Y_max (220mm bed minus 10mm safe margin) probe_count: 7, 7 # 7 points along X, 7 points along Y → 49 total fade_start: 1.0 # height where mesh starts to fade fade_end: 10.0 # height where mesh fully fades fade_target: 0.0 # target Z at max fade mesh_pps: 3,3 algorithm: bicubic # interpolation algorithm (optional)

Hm... Fade does end at 10mm, so the odd filament color change seems to start at the fade end.

I still think something here is messed up.

I also have no idea why it's reporting -2.505 in the center, because I calibrated the z-offset and printed a perfectly smooth layer across the entire bed.

So something is causing a value ot be weird on the firmware.

It might be the fade target set to 0, not the mesh average.

It then adds that height on layer ten, leading to walls moving inwards since the filament layer is stretching.

I'll try commenting that out and see what happens.

[upper elk]

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[zealous hazel]

Bump

Removing the fade target fixed it.