Flat pattern DXF export scales incorrectly

[Anonymous]

Hello,

I need dxf files for laser cutting. I tried to export the flat pattern, but when I export the flat pattern, the scale seems way off. It seems odd that I cannot simply convert a dwg to dxf. This is going to be an ongoing issue, I suspect.

The attached file should be somewhere in the 1:4 range (maximum dimension of 25.xx"). The only dxf viewer I have returns a measurement in excess of 200"

I'm hoping for some help.

E

[saito.kh]

Hi @Anonymous,

Welcome to the Fusion 360 community!

Thanks for posting.  As I opened the attached file with Autodesk DWG True viewer and measured some lengths, it seems to be correct with the scale noted in the drawings (it was 1:8 for sheet1; 1:5 for sheet2).  If I missed something, can you please share more information about this?  Did this happen after converted to DXF?

Thank you.

[Anonymous]

Hi Kanehiko, 

I am unable to use Fusion 360 to convert the correctly scaled DWG to a DXF. The DWG I attached in the first message is scaled correctly, as you mentioned. The issue I have is that I need a dxf to laser cut and I will need dxf's often. I downloaded a trial of AutoCAD LT to get over this hurdle, but need to determine a solution. 

This time I attached the DXF which is the incorrectly scaled export. I generated this by activating the design flat pattern and exporting.

Thanks for your reply, 

E 

[nolimitsplastic]

I have the same problem. I did notice that is seems to be exporting in Centimeters instead of what is active in the drawing. I know dxf files used to import with Centimeter measurements and then I think they fixed it but maybe they haven't fixed the export option?

Or maybe it is a setting option I am not seeing?

[ronaldrose1]

I seem to be running into a similar issue with the DXF not comin out to the size I require. I'm fairly new to fusion but if I draw in 1:1 scale why am I not getting a 1:1 DXF export? I need my files to go on a laser and these extra steps make this software cumbersome and less desirable to use. I cannot even open it in AutoCad with out Dimensions changing . example a .625 hole is coming out to 15.875 what am I doing wrong? my units are in Inches so not really sure what I am doing wrong 

[TheCADWhisperer]

@ronaldrose1 

What are your AutoCAD units -dwgunits with the preceding - sign as shown?

Attach your *.f3d file, and resulting *.dxf and *.dwg files here.

This will be an easy one to solve.

[ronaldrose1]

to my knowledge the everything should be set to inches and scaled 1:1 but I am still fairly new to the more advanced settings most my experience has been in only 2d cad and never really messing with the settings since I didn't own the software at the time. 

[ronaldrose1]

thank you for the quick response

[HughesTooling]

There's no flat pattern in the f3d file. When I create one the units in the flat pattern are in mm, do you see the same?

[ronaldrose1]

 

[HughesTooling]

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@ronaldrose1 wrote:

 

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Are you creating a flat pattern? The screenshot is not in the flat pattern workspace.

[ronaldrose1]

 the 2 pictures are a before and after I select to create a flat pattern. I guess my confusion is I come from mostly just AutoCAD and really have only ever needed 2D. In my brain I should be able to draw a sketch and save that flat so I can have my laser file and then finish modeling the part so I have a 3D model. I set preferences to English In ,psi

 

[HughesTooling]

Can you share an f3d design where you've created the flat pattern? The DXF you shared above is in mm, so 5/8 is coming out at 15.85mm

Thanks Mark

[HughesTooling]

If you use insert DXF from the insert menu it shows what units the file uses.

As you can see mm for your DXF.

Edit. If I create a flat pattern set to inches and export it inserts back into Fusion as inches.

[ronaldrose1]

created a flat pattern and saved. far as I can tell I was in Inches measured after and it was in Inches and correct size. I imported as well and had the same problem with the flat coming in as MM. I exported another DXF so this one I just created. I'm sure I'm missing some silly setting just cant see what it is. thanks for reaching out and helping out. when I just draw in AutoCAD and not Fusion I dont have that problem importing into my NC Post

[HughesTooling]

There's no flat pattern saved in this file! I can't test if you don't save the file with the flat pattern.

[HughesTooling]

The DXF file you just shared is in inches.

Also when i open in ZW3d it shows inches where used to create the file. I guess the program you're opening the file with is overriding the setting or just ignoring it.

[ronaldrose1]

Apologies if Im not doing stuff right Im a shop guy trying to learn this on my own using Youtube mostly 

[ronaldrose1]

thank you again for the assistance I started a personal project from scratch making sure I had everything in the proper units before progressing. and was able to import it into my NC writer software ( merrymech). so I'm guessing I missed a step somewhere on the model I was sharing earlier. thanks again I'm sure you'll see me asking dumb questions again have a great weekend !!