Cloud Compare or Meshlab could help.

Cloud Compare might be better here because you can add points with a regular spacing using point sampling. So rather than just giving each vertex as a point, you can get points that lie on the triangles/polys. This will help if your object has a low poly count or the polys vary in size.

As far as the ordering of points I mentioned in my earlier post, hopefully the software that came with the engraver will do this. Its possible to change the ordering by using a spreadsheet, and then you might be limited in the number of points. I don't know the maximum number of rows in a typical spreadsheet.