In attempting to use either 'export face as' or 'export sketch as' from a solid model in Inventor 2013 the resultant DXF file ALWAYS consists of PolyLines. This prevents other "downstream" software from properly importing the file as a DXF. Thus far the ONLY work-around I have found is to open the DXF in AutoCAD, Explode the polylines, and then re-save as a DXF from AutoCAD. Does anyone have any "easier" solution?
To expand on the explanation of the challenge that I have. We need 'true' DXF files consisting of ONLY lines, arcs, circles etc. for use with downstream software. What is produced by Inventor 2013 in either the "Export Face As" or "Export Sketch As" functions are (IMHO) pseudo-DXF files in that they are composed of (primarily) closed polylines. Currently, I have found that the only manner I have to get back to "true" DXF structure is to open the exported DXF file with AutoCAD, "explode" the polylines, then SaveAs DXF. This results in a "real" DXF file without polylines.
Useage of the DXF files are for various CNC path programming software. These range from some older Amada & Trumpf machines to some 'replicator' turning machines.
Hope this helps understand my situation.
I created an IV dwg and did a save copy as acad dwg.
Opened it in Acad, did a list of all curves and there are no polylines.
What are you seeing?
First off, let me thank you, and to any others, for your responsiveness to this situation.
If I 'open' the DXF (created by Inventor 2013) directly in AutoCAD, I get the profiles. If you hover the cursor over one of the profiles it lists it (in the tool tips) as a PLINE. If I click anywhere on one of the profiles, I get the entire profile highlighted with the coincident points with grips showing. If I issue the 'explode' command and select the profiles contained in the DXF and subsequently use AutoCAD's 'Save As DXF' it will be saved as the individual component arcs, lines and circles. After the 'explode' command (and if I later open the re-saved DXF) if I click on any portion of the profile, it only highlights the individual entity (arc, line etc.).
Once the 'explode' and 'Save As DXF' is done, (in AutoCAD) my downstream software works fine. However, the DXF issued from Inventor 2013 will NOT function with the downstream software. The ONLY possible file linkage I have with this downstream software IS via DXF files.
I consider this a significant flaw on ADESK's side. A 'DXF' file saved by one product should have the exact same functionality as any other product. In other words, there should NOT be any PLINES in the DXF files. If the intention of the DXF format (Drawing eXchange Format) is to allow tranfer of intent from one operational system to another, it has been defeated.
The pain is having to make a secondary "conversion" (with another piece of software) after creating the DXF in the first place.
Does anyone know if Autodesk will be addressing this issue (soon)?
Best regards, to all,
Additional functional process description...
For the process which is being employed, there are NO Inventor IDW or DWG files being created. Only the model from which to derive toolpath profiles. This is a EXTREME minimalist approach. Again, if the DXF file was being saved as it is 'supposed' to be, there would be no issue.
I was asked what I was "seeing"...I have attached a screen shot in which I have opened the DXF file and clicked on the outer profile and then hovered over the inner profile. These are the PLINEs that I see.
Thanks to all,
I believe that all variation of exporting to DXF from the sketch will provide you with a polyline.
Have you tried the App Exchange?
What I can suggest is for you, is to log a request to our Product Feedback Forum. This information is reviewed by each product manager for purposes of future development:
Autodesk Product Support
Thanks for the info. I will follow up on this with the Autodesk support forum you mention. For the time being, I will leave this thread open as a viable "internal to Inventor" solution is not yet forthcoming.
Thanks to all who have responded in my "plight".
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