I am a totally beginner at 3D printing and I have this question: I see many 3D printers (at amazon) with Z precision as low as 0.1mm! To me that's amazing but what does not amaze me is this: when I see the printed objects of those 3D printers you can easily with naked eye see the "vertical steps". How?
A precision of 0.1mm should be really almost impossible to see. If a person printed using 0.1mm precision how can I see the vertical steps?
I know there are some smoothin techniques to make the surface better but that shouldnt even be needed if the printer actually printed at 0.1mm in the first case.