I have the .STL file of a geometry and I want to add a small ball on already existing ball. please refer to the pictures for better understanding.
You can use meshlab (http://meshlab.sourceforge.net/), it's a free software, to convert to DWG, so you can edit it. I did this several times to import STL into Solidworks. My logo (fuleco) was made this way.
Thanks trinityscsp for giving me time, I have tried Meshlab for the same but couldn't get the file that I can edit in solidworks. My sincere request is that if you can do this it would be highly appreciable. You can give the output file in any suitable format (.IGES).