By default FlatCAM do not read the Excellon files with slots (oval holes). The workaround is to convert the Excellon file that has slots inside (for example Altium can generate a separate Excellon file for slots) into a Gerber file. Altium can do this conversion in Camtastic but there may be other software that can do the conversion (you could try it with Software Companions Gerbview - I didn't test it as I use Altium work license for that :) ) In the Gerber form it will load into FlatCAM very well and then you can paint the shapes and mill them. But all of this depends on the CAD software's ability to generate a Excellon file just for the slot holes otherwise it will have all the holes inside and I think that you don't want to mill all the holes ... There may be other solutions, read this forum (I think someone asked for it some time ago).
I understand the problem is the CAD software, I use KiCad and I can see that software don't do this holes. I hope that in future versions implement this characteristic, thansk you for your help
You can export the holes as gerber files directly from KiCad ;) This is an option in the "Generate Drill Files" window.
Sorry but not work. Maybe I'm doing it wrong but it does not work
As Marius said, it is a *workaround*. I admit that feature is really missing in FlatCam, but you can still do something that works. Here is what I do: - in "Generate Drill Files", select "Gerber X2 (experimental)" [Capture](//muut.com/u/flatcam/s1/:flatcam:dAaq:capture.png.jpg) - you should get a gerber file that ends with "-PTH-drl.gbr", open it with FlatCam - in "Isolation Routing" use a negative tool diameter then hit "Generate Geometry". Note that it should be less than the half of the hole diameter. For example : for holes that have a diameter of 1mm, I use a 0.8 drill bit and I set -0.8 in Flatcam. Here is what I get : [Capture2](//muut.com/u/flatcam/s3/:flatcam:6LsV:capture2.png.jpg) - Then you could generate your CNC job. (don't forget to set back your tool diameter to a positive value in that tab)
I haven't this windows [img]https://i.imgur.com/9vrT9ND.png[/img]
You are on the right window, but I think your version of KiCad is too old. It's probably a new feature from KiCad 5. I currently use KiCad nightlies on Ubuntu. (my build is "5.0.0-rc2-unknown-dfa9175~65~ubuntu18.04.1") It seems that you can download some builds for windows here: http://downloads.kicad-pcb.org/windows/nightly/
I download the kicad in the official web the current version is 4.0.7, i don't know there are other versions thanks for your help
You're welcome :)
> - in “Isolation Routing” use a negative tool diameter then hit “Generate Geometry”. Note that it should be less than the half of the hole diameter. "it should be less than *the hole diameter*." (small mistake ^^')