I import a .DXF file from Freecad a simple square into lightburn. into Atomstack A10 pro.
Set layer 2 190 85% 1 pass. run the file
the laser cuts out the square 3 times.
I make the same square in lightburn and set the same layer 2 and the square runs 1 pass as it should.
I have some complex hydroplane parts to cut and would like to have a one pass operation.
Thanks
Donn
Did you check for duplicates?
Yes I deleted duplicates. Remember i created a square in lightburn and used the same layer settings and it was a 1 run pass
Sometimes I have imported them in and there are double lines. If you select a single line it looks different than a line with one on top of it.
Might select it and press delete and see if that changes or deletes itâŚ
Itâs kind of a trick to see this because the are perfectly alignedâŚ
Can you post your DXF file for us to look at? BTW youâll probably need to append â.TXTâ to the file name (after the .DXF extension) so the forum software doesnât reject it.
1 Like
Feel free to also( along with the dxf file ) include the LightBurn project file after youâve imported the dxf, adjusted your layer information then saved it.
With those two files we should be able to pinpoint whatâs going on.
Today everything is working as it should. not sure what changed.
I have exactly this very problem and nothing I have done so far helps.
I sketch the part in FreeCAD then pad it.
No matter in which format I export (flattened SVG, DXF etc.) LB always does 3 to 5 times the whole cut (so if I say 5 passes it does 25).
I tried everything, including exporting just the sketch, working with LC Interlocking workbench, nothing works out. I just unnecessarily often cuts. I also do not understand why it is called Flattened SVG when i reality it is for from being flattened (if it has numerous lines on top of each other obviously).
I also personally feel that it shouldnât be necessary to delete additional lines. Because even if I do that, the stupid thing just goes over it again and again. I just canât figure it out how to do it right.
Can you upload the dxf file here.
I use freecad a lot and I have to flatten the svg or it wonât export.
I drew up a case for a flow meter, exported the lid svg to cut on the laser and 3d printed the case.
Everything fits fineâŚ
Maybe a step by step procedure so we can duplicate what you are doing?
Here is what I finally did to make it work, I just re-did the whole thing from scratch in FreeCAD. I assume, there was some error in creating the CAD file in the first place.
For the more complex shapes (see below) I just broke the basic form apart in LightBurn (awesome, what it can do!) and drew some new lines to get to the shape.
Have not yet cut it but at least the preview looks good and works as expected.
Hereâs the file
dice tray new.lbrn2 (86.1 KB)
1 Like
Looks like you found a hack to get by but maybe if you share the dxf or detail what you did in FreeCAD then someone can post a solution so you or others donât need to hack the results?
Iâve seen someone post about this problem beforeâŚ
1 Like
Sorry, of course youâre right. As my âhackâ is somewhat based on community response itâs only fair to share my original file so maybe someone else can benefit from the solution (and I learn something 
)
Hereâs the dxf I created by exporting in FreeCAD to Autodesk flattened file:
export-dice-tray-BodyPad.dxf (44.5 KB)
1 Like
it is coming from FreeCAD with multiple/overlapping drawing elements. So now to find out how is this created/generated in FreeCAD.
Is it like this( only minus the dimension and extra stuff you donât want since youâre using it for laser input)?
BTW, have you tried to export the sketch as a DXF file instead of padding it into a 3D object and then trying to export it? And donât get me wrong, Iâd still like to know how you exported the 3D object and got the DXF which had duplicates.
hm⌠not really sure, as this seems to be a technical drawing that is really made for being printed on paper (or for documentation).
I also tried to export from the sketch, didnât work either. There must be a mistake somewhere in the creation process, because when I âre-createdâ the file (basically doing it again from scratch) it all worked out.
Oh man, THAT is exactly what happened with the original author of this thread. 
Any chance you have the previous FreeCAD design file which generates the bad output? I would be willing to post to the FreeCAD forum whatâs going on and some of the experts there might be able to see what glitching is going on.
didnât know of this one, thanks a lot @Jimcoy
This means for me, that no matter how messy my original file is (because Iâm a FreeCAD noob 
) I can still clean it up in LightBurn.
I once again have to pad myself on the should for purchasing this software haha 
Not exactly. That tool will only delete true duplicates. When you made your initial post about this I tried applying this technique. Some of the duplicates were removed but not all the artifacts in the drawing were actually duplicates so were not removed.
In general, while this is a nice tool to help cleanup drawings I wouldnât suggest relying on it in a production workflow.