Was z-level calibration done correctly?
I tried to calibrate Z height and I'm not sure if I've done it correctly. This is picture o first layer of the Prusa logo print (I think print come out fine?). Does it look correctly?
The first later is the other side!
If you want to make a good first layer picture, print only one layer, and make a picture.
The first layer should have no holes and stick good together.
First layer
Sorry - it seems to be problem with forum software as I added both pictures but only second one was displayed?
If you're using the built-in first layer calibration method, do yourself a favor and ditch it in lieu of this: https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/.
This method makes it a lot easier to gauge the quality of your live z. Feel free to post pictures of your test square for critique. From the picture above it's hard to assess; if you print more than one layer, the next layer(s) will fill in gaps in the lower layer. Also, not sure what those black dots are. Are these holes or debris?
First layer
I will check this method. It seems to be very small holes (I can hardly feel it when I use my prints - the sensitive part of finger - to feel it)