kicad-developers team mailing list archive

[Nick Østergaard <oe.nick@xxxxxxxxx>]

I have identified all the circles in the photo from Jon that creates
the circles. The red indicates approximately where the circle was
supposed to be and the green links that to the big circle.

Nick

2014-10-15 20:11 GMT+02:00 Nick Østergaard <oe.nick@xxxxxxxxx>:
> Hello
>
> I might have identified the issue. I did checkout Jon's board on his
> github account, then I grepped around a bit and found that: grep
> circle POE.kicad_pcb  | grep "0 0)"   matches almost the number of
> circles that appear on silk.
>
> I then noticed that, at least the fp_circle entries ones use relative
> coordinates to the module to draw that. The issue _I think_ is that
> the gerber exporter do not interpret this coordinate as local to the
> module but global. So this would match up pretty good to the images
> that Jon is seeing on his board.
>
> An example is the P1 and P2 modules (which is a single pad with a
> centered circle on the silk).
>
> So the isse could be that the exporter is mising the module origin
> offset when using the fp_circles.
>
> I have attached a minimal board that I think should show the bug.
> Mitch, can you please try to send that though your fabs viewer?
>
> Regards
> Nick Østergaard
>
> 2014-10-15 20:00 GMT+02:00 Jon Neal <reportingsjr@xxxxxxxxx>:
>> Since the image was not attached either here is a link to it:
>> https://www.dropbox.com/s/3nffd78xj154txh/2014-09-22%2012.32.53.jpg?dl=0
>>
>>
>> Jon
>>
>> On Wed, Oct 15, 2014 at 1:36 PM, Jon Neal <reportingsjr@xxxxxxxxx> wrote:
>>>
>>> Maybe I'm not allowed to attach zips? I can see it on my end! I will try
>>> again with this email.
>>>
>>>
>>> Jon
>>>
>>> On Wed, Oct 15, 2014 at 1:33 PM, Nick Østergaard <oe.nick@xxxxxxxxx>
>>> wrote:
>>>>
>>>> Classic.If we assume you really attached a zip then it has been hidden
>>>> pretty well on the way to my end.
>>>>
>>>> 2014-10-15 18:23 GMT+02:00 Jon Neal <reportingsjr@xxxxxxxxx>:
>>>> > Hi,
>>>> >
>>>> > I had a board manufactured about a month ago and when I got it back
>>>> > there
>>>> > was a strange issue with the silkscreen. (see attached image) All of
>>>> > the
>>>> > circles in the silkscreen layers are absolutely giant and all centered
>>>> > on a
>>>> > point offset from the board.
>>>> >
>>>> > The gerbers were generated with KiCad BZR 5101, gerber format 4.6, mm
>>>> > for
>>>> > the units, and absolute positioning.
>>>> >
>>>> > Another person that used the same pcb service I used had the same
>>>> > problem
>>>> > using the same gerber settings with BZR 4988.
>>>> >
>>>> > The service (hackvana) believes this to be a KiCad issue rather than an
>>>> > issue at the fab. I tried looking at the gerbers a bit, but I don't
>>>> > know
>>>> > enough about the gerber format to know what to look for.
>>>> >
>>>> > I attached the gerbers used for the board as a zip for those who want
>>>> > to
>>>> > look through them.
>>>> >
>>>> > Thanks!
>>>> > Jon Neal
>>>> >
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>>>> >
>>>
>>>
>>