So your question is did difficult to fully understand but here is my take on. In a 3D scanner there are limitations with the way you scan: single line, structured illumination and also the wave length used and the capacity of your camera to pick up correctly the signal. If the scan is of low quality you have to start with. Low quality mesh/point cloud and you cannot do anything about that unless you correct every single mistake using a software that give you the possibility to polish and close the meshes such as blender, meshmixer but the learning curve can be steep. First make sure your raw data (initial scan) is optimal, play with your scanner settings, quality of the illumination, treatment of the surface with powder to limit reflection. If you can always increase the number of scnas
It is also a matter of the 3D printer you are using. If it is based on a FDM technology it can go at 30-50 micron, a DLP can go even higher in resolution.
In 2004, using a 3D digitizer (Konica Minolta Non-Contact 3D Digitizer VI-910) in small archaeological objects, as well as the application of the 3-Dimensional Photopolymers Printing System by means of a 3D printer (Objet EDEN 500VTM), it was made a printed model configured by layers of 16 micron.
For technical details, see more in the link below (specially in annexes):
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