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Can I make oval holes?

nesti
Mon, 21 May 2018 10:46:47 GMT

hi, I need make a oval holes, i have various devices with its foot oval, FlatCAM make this footprint? or how can I make this work in flatCAM?

Marius Stanciu
Mon, 21 May 2018 11:56:09 GMT

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).

nesti
Tue, 22 May 2018 06:18:05 GMT

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

idechix
Thu, 31 May 2018 16:15:39 GMT

You can export the holes as gerber files directly from KiCad ;) This is an option in the "Generate Drill Files" window.

nesti
Thu, 31 May 2018 21:45:32 GMT

Sorry but not work. Maybe I'm doing it wrong but it does not work

idechix
Fri, 01 Jun 2018 10:07:03 GMT

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)

nesti
Fri, 01 Jun 2018 10:36:38 GMT

I haven't this windows [img]https://i.imgur.com/9vrT9ND.png[/img]

idechix
Fri, 01 Jun 2018 10:54:27 GMT

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/

nesti
Sun, 03 Jun 2018 08:15:25 GMT

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

idechix
Sun, 03 Jun 2018 10:11:18 GMT

You're welcome :)

idechix
Sun, 03 Jun 2018 10:20:54 GMT

> - 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 ^^')