Exporting DXF Scaling Issue
If you check, you will find the dimensions are correct, number wise, but the units have been changed. Fusion works on centimeters if you use the Export function. You will find the ratio is 2.54:1 between the Fusion model and the DXF.
John Hackney, Retired
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Hi,
@cdamiani wrote:
How can I correct the scaling.
if you want to "export" a sketch do it this way:
and not via file > export!
günther
@cdamiani wrote:
How can I correct the scaling. You would think Autodesk would fix this
issue by now.
What and how are you exporting? From all my tests exports whether using Save as DXF or exporting the whole model, the file contains unit information. As long as the program opening the file reads this info the scale will be correct, I'm surprised AutoCAD is getting it wrong. Can you attach an example file, you might need to ZIP it to attach it to the forum.
Note. Save as DXF will export in the current document units whereas export will save in CM. The exported file will have units information stored in it so any program opening can read this info.
Mark
Mark Hughes
Owner, Hughes Tooling
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@jandolina Are you using Save As DXF from the right click menu when you click on a sketch in the browser? If you are the DXF will export using the current document units, so 10 inches if your document is inches. The unit info is stored in the DXF file so any scaling problems will be down to the receiving program.
Mark
Mark Hughes
Owner, Hughes Tooling
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@jandolina wrote:
Mark,
didn't validate as proper xml when
I tried to attach it to my original post?
Do you mean DXF? The forum only allows a few file types, DXF is not one of them so you need to ZIP the file then attach the ZIP file.
Mark
Mark Hughes
Owner, Hughes Tooling
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@stevewilkin wrote:
I’m not an expert on the DXF format, but I think what’s happening in your case is the following:
DXF is a unit-less format, which means it doesn’t store which measurement system you used to create it (mm, inches, pixels etc), just the numbers.
Actually that is wrong, there are a lot of programs that don't set the units but AutoCAD has had the ability for years. The unit information is stored in DXF files exported from Fusion, the variable $INSUNITS is set to 4 for mm. You can test this in Fusion, setup a design in inches, export a sketch using Save As DXF then import into a design set to mm and the size will be correct.
Mark
Mark Hughes
Owner, Hughes Tooling
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@Anonymous wrote:
This isn't at all solved for me.
Which ever method I use to export DXFs, either directly from the sketch or from drawings, the scale is completely skewed when opening the DXF in any third party software (have tried 5 different packages all showing the same skewed results).
I'm utterly blown away that this is an issue. And one that there seems to be no response for. How can that even be possible for such a critical component of the software? What is the point of having all of this amazing design power if you can't send files to machines to get cut at the right size?
Mind blowing. Never had this issue with Solidworks.
How are Autodesk supposed to fix a third party's program that isn't reading the DXF correctly? Here is what I get exporting a DXF to ZW3d. As you can see ZW3d reads the unit info and scales the sketch correctly. Your mention of Solidworks is quite funny as they don't actually set the unit info correctly in their files, they only set the $Measurement variable to either 0 for English or 1 for Metric but English what inches, feet, yards, miles?! Fusion's DXF files are correct so you need to report the bug to the third party developers and point them to this document, page 47 might help.
Mark Hughes
Owner, Hughes Tooling
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