Exporting DXF Scaling Issue

[cdamiani]

When I export a part from Fusion 360 to a dxf and open it in AutoCad the scale is wrong.  The same thing happens when I open the DXF in Vcarve Pro.  Seems like a Fusion issue.

[martin.murbach]

Here is the export I've done from fusion :

Here is the dimension mesured on e-drawings from the exported file : 

I've noticed that if I open the exported dxf in fusion rather, then the dimensions are correct. However, I've never seen this behaviour in any other CAD software, which makes me believe that it comes from Fusion 360 .. 

[HughesTooling]

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@martin.murbach wrote:

Here is the export I've done from fusion :

However, I've never seen this behaviour in any other CAD software, which makes me believe that it comes from Fusion 360 .. 

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No, the problem is the viewer is assuming the file is in inches and is scaling it, I expect if you set the units in the flat pattern to inches the viewer will show the correct size. Try downloading QCad for a viewer. 

If you're sending the file to someone for manufacture you might be better off using your 2d Drawing workaround so you can specify the units on the drawing.

Mark

[martin.murbach]

I'm no expert but find it quite surprising it only happens with Fusion if it is unrelated with Fusion. 
To test it I've exported the file from Fusion to Step
Opened it in solidworks. Flattened it and exported it to dxf from solidworks. 
Opened the dxf on edrawings and everything is fine here. 

[HughesTooling]

Try reimporting the DXF from Solidworks into Fusion. From my tests, solidworks files do not import into other programs that read the INSUNITS (System Variable) info in DWG\DXF files. Solidworks writes out the the file as metric or imperial but does not set the units used by the program creating the file. Solidworks own viewer will read the file because they only read the metric or imperial info. If you want to waste time you can create a file that set to imperial and set the units to feet and Solidworks viewer will not scale to the correct size.

Mark

[teknical.arts]

I wanted to mention this somewhere since I haven't seen this in any forum and thought it might help someone else.

We recently faced this issue in our work group where one of our members did not have access to AutoCAD for quick rescaling of a part they were working on. This is what we discovered in the way Fusion creates dxfs.

Fusion uses the drawing standard, ASME or ISO, as the indicator for the type of dxf it creates.

ASME = inch scaling

ISO = mm scaling

The standard is only selectable on drawing creation. So if you need the opposing scaling you have to create a new drawing in the correct standard.

To check what standard a drawing is using go into the drawing and open the "Document Settings" in the navigation browser.