Donut shaped board gerber export issue

[PeeterVois]

Hi, I have trouble with donut shaped board gerber exports (kicad 5.1.0 release). The board outer area is circular with dia ~40mm and in the center is dia ~20mm cutout. I can draw the circular edges (outer circle and inner circle) nicely into Edge.Cuts layer. When viewing the board with 3D viewer it looks perfect. But when looking the exported gerber files with Gerber view, then edge cuts are not visible at all. When uploading the gerbers into Eurocircuit then the outer edge is ivisble on preview but inner cutout is not there.

I would appreciate any ideas how to draw this board with in the center cut out huge area.

(as I can not upload attachements, I paste here the simple edge cuts gerber)
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,5.1.0-1.fc28*
G04 #@! TF.CreationDate,2019-05-07T13:04:58+03:00*
G04 #@! TF.ProjectId,liugur,6c697567-7572-42e6-9b69-6361645f7063,0.1*
G04 #@! TF.SameCoordinates,Original*
G04 #@! TF.FileFunction,Profile,NP*
%FSLAX46Y46*%
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
G04 Created by KiCad (PCBNEW 5.1.0-1.fc28) date 2019-05-07 13:04:58*
%MOMM*%
%LPD*%
G04 APERTURE LIST*
%ADD10C,0.050000*%
G04 APERTURE END LIST*
D10*
X147680000Y-101150000D02*
G75*
G03X147680000Y-101150000I-10200000J0D01*
G01*
X155480000Y-101150000D02*
G75*
G03X155480000Y-101150000I-18000000J0D01*
G01*
M02*

[eelik]

Have you read https://www.eurocircuits.com/indicating-slots-milling-contour-and-routouts-in-your-pcb-design/ ?

[davidsrsb]

Also beware that there are low cost PCB makers with old software that has a bug with full circles, it is safer to use a couple of semi-circles

[SembazuruCDE]

@PeeterVois

But when looking the exported gerber files with Gerber view, then edge cuts are not visible at all.

EDIT: Ok, yes… This was a silly question, I didn’t notice that you cut and pasted your Edge.Cuts gerber to the original post. Obviously you generated it. Sorry for the confusion (I think I saw the paste and assumed without looking that was version info…)

Silly question, but often the silly ones are the solution… You did remember to generate a Gerber of the Edge.Cuts layer, right?

There is also a setting on the gerber plot dialog called “Exclude PCB edge layer from other layers” that on my system is selected. I don’t recall what the default value is for that, but since I haven’t generated gerbers on this particular machine I suspect the setting I see is the out-of-the-box default. Some manufacturers insist that the board edge only appear on it’s own gerber layer, other manufacturers don’t care. So if this option is set and you don’t generate the Edge.Cuts layer on its own, you won’t get any board edge data in your gerbers at all.

[maui]

@PeeterVois

But when looking the exported gerber files with Gerber view, then edge cuts are not visible at all.

your pasted simple edge cut is visible with kicad gerbview on nightly…

@PeeterVois

When uploading the gerbers into Eurocircuit then the outer edge is ivisble on preview but inner cutout is not there.

Eurocircuits has its way to include internal pcb cut-out:

Slots and cut-outs - Eurocircuits

[der.ule]

I recently have also this issue with another Web preview, I was told that it was normal (known limitation of Web render), however I could see everything nicely on my gerber files.

[PeeterVois]

Thank you for all the feedback.

It all ended up well: I’ve got quotation from Eurocircuit and on that quotation the board looks perfect, as it should be. Thus the generated edge cuts file must be correct. The produced boards are perfect aswell.

Thus I need to upgrade my Gerber View to view edge.cuts layer witch circles correctly.