Hi Pat as our learned colleagues have said, its a complex journey. To get fine details on small items you need an very expensive printer. Depending on how small, its may be better to purchase, Mold/ model from cold set clay ( lots of info on youtube), hand carve wood etc, model railway figures etc There are lots of options. Both a CNC & 3D printer are a Hole for money to be put in that never fill ups. They are fun but a long journey and not always the solution.