Hi PaQ, I tried loading the DXF file into Rhino and ViaCAD and even Adobe Illustrator and it comes in as expected in all of those, so as far as I can tell there isn't anything wrong with the DXF file itself.

As far as I can tell it looks like some kind of bug in the Modo DXF importer.


> However, when using the .dxf, object comes 100* bigger in modo, so a 30 cm length curve = 30 m in modo.
> Maybe this scaling difference is the reason of this loosing precision problem.

You'd have to have a lot more scaling happening than that to lose precision to the extent to get that type of noticeable coordinate quantization. More like scaling by 1/100000000000000 or so.

Units with DXF files are kind of tricky, the setting for which unit system the DXF file is actually in is fairly obscure and so a lot of programs don't know how to find which units the file coordinates were in. Some programs give an option that shows up at import time where you can pick the units but it sounds like Modo just assumes meters. So you might want to switch units to meters before doing the DXF output to match what Modo is expecting to see in the DXF file.

- Michael