Hi,

when I need to convert a bitmap I usually do it manually with a little trick:
  • First the picture is opened and scaled to fill almost the entire screen...
  • Then I start my CAD program and make its window half transparent (using a free program called "Glass2k")
  • This way I can see the bitmap through the CAD program window and easily trace it manually with lines, arcs and splines...


The output of most bitmap to vector conversion programs is basically unusable for CAM programs (due to gaps / overlapping lines etc.).
Only if the bitmap resolution is high, uses no color shades and all edges are sharp some programs are able to create reasonable results - but I've never seen e.g. a scanned drawing turned back into a usable .dxf file without doing a lot of rework first...


Christian