This is very likely related to Corel/Flash
exporting the files as R12 DXF files since this version did not support spline
objects. Therefore, as part of the export process, the splines are
converted to a series of line segments. One of the reasons for this is
that many laser cutting machines can accept DXF files as input format but they
cannot understand spline curves so from within your CAD application you can
design using splines and then export to R12 DXF which would convert all splines
to a series of line segments which is something the laser cutter can
understand.
As for getting true splines into Inventor, you are
going to have to go to a format that maintains the curves as splines.
Because I'm not familiar with Corel Designer, I can't say what route is the
best. Are there other versions of DXF or DWG that you can export to?
It might be a long way around but you could *try* to export from Corel as Adobe
Illustrator, import that into Rhino, and export out DWG from there. I
can't confirm that any of this will maintain the splines because I don't have
Corel Designer so I'm not sure what formats it exports to.
-Ryan
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I
am not an experienced CAD user but this is something that has been bugging me
for a long time. I have several packages which I use to create graphics with
and recently I have been trying to get a Corp logo from one of my 2d programs
into inventor so that I could get it CNC'd or something similar and it seems
that even though it is curves in my 2d program. Corel Designer As well as
FLash 5 if I export it to dxf from those programs and import it to Inventor it
ALLWAYS converts curves to 'billions & billions' of straight line
segments. Am I missing something fundamental? Am I just Daft? If anyone has
any suggestions for getting a useful sketch from some 'other' 2d cad program
into inventor?