Failed Z axis calibration after mk4s -> Core One upgrade

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jhawk28

(@jhawk28)

Member

Failed Z axis calibration after mk4s -> Core One upgrade

What sort of things should I look into for troubleshooting why the Z axis fails calibration? It seems to make a grinding sound. It is able to move the bed up to the top.

Posted : 05/07/2025 10:55 pm

Tinker

(@tinker)

Member

RE: Failed Z axis calibration after mk4s -> Core One upgrade

Check if the nozzle is actually hitting the build plate. I had to lower the nozzle a bit to pass the Z axis calibration.

Posted : 07/07/2025 9:10 am

jhawk28

(@jhawk28)

Member

Topic starter answered:

RE: Failed Z axis calibration after mk4s -> Core One upgrade

Yes, that was the problem.

Posted : 11/07/2025 1:18 am

Lance Luther

(@lance-luther)

Eminent Member

RE: Failed Z axis calibration after mk4s -> Core One upgrade

Going to piggyback on here as I am having the same issues and tried to lower the nozzle but no luck. I have tried adjusting the trapezoidal nuts and even have a level to check the true of the bed and everything looks good but just will not pass. Any ideas on what else it could be?