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Table of Contents
Why does the Z Offset Drift, Vary or is Lost?
Answer:
Should it be saved?
The value for the gcode z offset that fine adjusts layer height to properly shape the filament cross section is not saved in printer.cfg. The Elegoo ancillary screen has workflows that attempt to save it to a file yet this is not a standard Klipper practice and using other printer controls results in indeterministic results.
Does it drift or vary between prints?
Well, it doesn't, yet things that it's based off of do.
The default probe tolerance for its readings using either the klipper or elegoo defaults allows for inaccuracies of 100 microns, which while often a variation of 30 microns is enough to throw off the filament squish. tuning_the_z_probe_configuration and improve this issue and is a best practice.
The z steppers using Elegoo's defaults allow for interpolation and introduce inaccuracies in the movement of the Z axis causing drift. This can be remedied by tuning_the_z_steppers.