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Converting splines to polylines

6 REPLIES 6
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Message 1 of 7
jamjumpin
5257 Views, 6 Replies

Converting splines to polylines

Does anybody know of a program that will convert splines to polylines cleanly or has experienced the problem below?

 

We need polylines for waterjet cutting. 

Using the polyline conversion in Autocad leaves us with highly complex jagged lines on the curves which crashes the waterjet machine. 

We don't need a perfect conversion, just a very close smooth representation using arcs. 

 

The main problem we have is with Sign Pro Flexi.

We use this program to convert clients spline artwork (usually supplied as EPS) to polylines

When we export to DXF to convert the splines to polylines, AutoCAD is unable to open the DXF and gives the error:

 

Table name missing on line 38.

Invalid or incomplete DXF input -- drawing discarded.

 

We don't know how to fix this. This problem didn't exist until we ungraded to a newer flexi program. The older one doesn't run on Windows 7. 

 

I am running Flexi 8.0 v2

 

Autocad 2014

 

6 REPLIES 6
Message 2 of 7
JDMather
in reply to: jamjumpin

Is this an AutoCAD question or an Inventor question?


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Message 3 of 7
jamjumpin
in reply to: JDMather

HAHAHAHA Oh no!! I'm so used to posting in the Inventor forum.

It's an ACAD question!

 

Thanks

Message 4 of 7
JDMather
in reply to: jamjumpin

Are you creating these dwg from Inventor sheet metal environment?

 

(there might be a solution that does not involve AutoCAD)


-----------------------------------------------------------------------------------------
Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional


The CADWhisperer YouTube Channel


EESignature

Message 5 of 7
jamjumpin
in reply to: JDMather

No, the information comes from an EPS usually.

 

The information was usually created by a graphic design company for use on letterheads and such. 

 

We want the polyline artwork to both use in AutoCAD for manufacturing drawings, but also to send for waterjet. 

Message 6 of 7
jamjumpin
in reply to: jamjumpin

We fixed it by upgrading Sign Pro Flexi
Message 7 of 7
mrattray
in reply to: jamjumpin

For future reference, there's a little known trick in ACAD for converting splines that I use for laser cutting. The trick is to down save the file to an R12, close the file (that's important), and then reopen the file and re-save to the version you need. R12 formats do not support splines, so ACAD will convert all splines to polylines automatically which can then be exploded if needed.
Mike (not Matt) Rattray

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