Strictly by looking at the technical specifications of an FDM printer, there are a few things to note regarding the maximum print quality you can expect to achieve:
- The minimum layer height - here given to be 0.1 mm
- The nozzle diameter - here given to be 0.4 mm
Minimum layer height:
On a finished print, the minimum layer height will affect how visible the horisontal lines of the print will be. Printing at a lower layer height can dramatically increase the smoothness of the finished part, while equally increasing the printing time - among several other things.
A minimum layer height of 0.1 mm is fairly common for low-cost desktop FDM printers.
Just like the layer height defines the vertical resolution of a print, the nozzle diameter defines the sharpness of horizontal features of a print.
When printing with a large nozzle diameter, all sharp edges and corners of the model will have a slight roundness to them: the larger the nozzle diameter, the more rounded sharp corners will be, and vice versa. You might think of it as making a detailed drawing with a blunt pencil.
A nozzle diameter of 0.4 mm can perhaps be considered the standard for desktop FDM printers today, and will allow you to print "fairly accurate" parts.
Will the daVinci work for you?
Since I've never worked with the daVinci printer before, I cannot make a statement on it's user friendliness, or actual performance.
In general, if you intend to use it to print fragile, complex models such as insects, I believe a resin based printer might be more right for you, since they typically will allow for much higher reproduction of details than FDM printers. Printing solid/compact structures like coins and nuts, on the other hand, can typically be handled by a well calibrated FDM printer.