I tried many cheap printers, also I have large 3D printer that we designed but these don't have this issue.
We bought Ultimakers because they are advertised for product development and on data sheet they state that dimensional accuracy is 12.5 microns but we did some measurements using microscopes and other optical measuring equipment and Ultimaker 2+ is even better than advertised but Ultimaker 3 at default settings has up to 0.5mm deviation..
I've tried support they responded first time, but haven't heard from them in month.
So what are my options here? I just want to know if Ultimaker is aware of this issue, and will this printer every be able to correctly at 0.2 and 0.15mm layer hight?