Cam making....

Firstly, many thanks for all the help with the ELCB problem.

My miller spends a lot of its time making patterns for lost wax
casting parts for obsolete engines mainly associated with Morgan
Three Wheelers and now and then the odd exotic motorbike.
Latest idea is to make cams. A colleague is planning to draw the cams
5 times life size on paper (probably a bit of magic goes into this
step....) so step one is to scan the drawing into the PC and get a
JPG. I then want to convert to a CAD file so have come across IMG2CAD
which allows me to convert the scan to a DXF file. This then is
loaded into my copy of Autocad LT. The cam shape is a 3D polyline and
if you zoom in it is pretty bumpy. The plan then was to scale the
drawing back to normal size then feed the DXF file into Mach3 to
generate the G code. A dry run indicates that all this works but I
would like to smooth the polyline in Autocad LT before sending it to
Mach3.
My knowledge of Autocad is limited at best and I have had a poke
about looking for a command that will allow me to smooth the polyline
but so far no luck.
Does anyone have any advice on smoothing my scanned polyline cam
profile in LT or even a better idea on how to go about this?
Thanks

Ian