This problem is driving me crazy, no, seriously speaking. I bought this printer this week and started to calibrate for accurate dimensions. I printed the one-and-only calibration cube (20x20x20 also a 10x10x10) and well, the dimensions for the X & Y axis are perfect, but the Z-axis is a big problem, almost 1.5 mm bigger than expected.
I tried everything in order to resolve this issue, I checked to see if the steps are correctly calibrated using a ruler and moving my extruder up and down, precise as you expected, no weird sounds coming from the Z-axis and stepper while printing. I calibrated the E-Step, also the bed leveling is done automatically using the BLTouch probe. Also I want to mention that the first layer is perfect (took time to calibrate this too).
I am using Cura for slicing using the default profile for the Ender 3 Pro, Premium PLA, 210 °C for the first layer & 200 °C for the rest, 50 °C bed temperature.
I will leave here some photos, perhaps somebody could give me an idea.
As you can see from the images the Z-axis is scaled-up perfectly. This difference is about 1.5 mm for both cubes (the one with 20 mm & 10 mm).
Has anyone encountered this type of problem before?
EDIT: I will attach some pictures with the first layer. Right now I observe some wobbling in the Z axis and saw that the printer is not perfect laid on the table, one corner was lifted. So I tried to flatten. Waiting for the test print.