Hi all,
For ages SW outputs dxf files of 2d profiles from a drawing with minute errors. Most cnc laser or router cam software require flat 2d closed polylines to cut or machine. SW exports what should be a closed polyline as a series of lines and arcs with (sometimes) small gaps between the endpoints. This means you can't use pedit to join them. If you have express tools you can enter a fuzz factor to heal it, but it's obviously a work around.
What I do now is this:
In my part file I select the top face of what I want cut. If it's a split part I select all required faces. Then saveas Acis, select faces only option and save. You may need to create a 'proper' cartesian coordinate system, with Z pointing up not out.
Open this sat file in acad with 'acisin', and all the faces appear as regions. If you arn't familiar with regions they are like a 2d solid. ie, can't have gaps in the corners because it is a body.
If you explode a region it becomes a sequence or arcs and lines which can easily be pedited together to a closed polyline.
Zander