kicad-developers team mailing list archive

[Cirilo Bernardo <cirilo.bernardo@xxxxxxxxx>]

There is really no point in writing Gerber files in inches; it would take
some extraordinarily bad software to not work with metric units.  From a
technical viewpoint using mm will require far fewer digits to represent a
point to a given tolerance even if the design is on an imperial grid. I
think effort is better spent finding out exactly why Seeed rejected the
files.

- Cirilo


On Tue, Feb 16, 2016 at 3:28 PM, Andy Peters <devel@xxxxxxxxx> wrote:

> This is 4.0.1 on Mac OS X 10.11.
>
> I submitted Gerbers and drill files to Seeed Studio for fab last night,
> and they got bounced for some reason which got lost in translation. I think
> they thought that the two separate sets of Gerbers submitted on the same
> order were for the same job. But anyway.
>
> Since Seeed’s support is little more than a set of Wiki articles written
> by users, it’s not at all clear what they require. But there is a page
> about generating Gerbers from Kicad here:
> http://support.seeedstudio.com/knowledgebase/articles/613173-how-to-generate-gerber-from-kicad
>
> It seems to suggest doing everything in inches, not mm.
>
> And here is the rub: I designed the board in mm, and can switch at will
> between mm and inch grids. But when it comes to generating Gerbers, there
> is no way to change the output from mm to inches. We can do that for the
> drill files, but not for the Gerber plots. Am I missing something or is
> this a missing feature?
>
> -a
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