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Re: CADSTAR Importer & Pad Stacks


Hi Roberto,

Sorry it took so long to reply but I've been busy.  I did read your
draft and it looks promising.   Please give me permission to at least
add comments.  I don't necessarily need full edit permission.



On 7/11/20 8:01 AM, Roberto Fernández Bautista wrote:
> Hi all,
> Has anybody had a chance to check the draft document I made on Pad
> Stacks
> <https://docs.google.com/document/d/1lxBI7_X_I7pO-nuDHPRVlfRBH24XTmwuuN69o_Bqk3s/edit?usp=sharing>? 
> I would like at least some feedback if this is the kind of document you
> would be looking for, or if not what to change about it/what it should
> focus on. 
> I'm keen on pad stacks in KiCad since CADSTAR heavily relies on them -
> at the moment the importer wouldn't be able to handle complex cases. 
> I would like to help wherever I can to get this in before v6 feature freeze.
> Thanks.
> Roberto.
> On Sun, 21 Jun 2020 at 12:19, Roberto Fernández Bautista
> <roberto.fer.bau@xxxxxxxxx <mailto:roberto.fer.bau@xxxxxxxxx>> wrote:
>     Jon,
>     Thanks for the advice. It will still be a while until I have
>     something working but yes, I will create a merge request once I have
>     a skeleton for the importer.
>     @Jeff Young - I've made you an editor of the document I made on Pad
>     Stacks
>     <https://docs.google.com/document/d/1lxBI7_X_I7pO-nuDHPRVlfRBH24XTmwuuN69o_Bqk3s/edit?usp=sharing>.
>     Hopefully you will have received a separate email with an editor's
>     link. Let me know if that wasn't the case.
>     Roberto
>     On Sun, 21 Jun 2020 at 02:51, Jon Evans <jon@xxxxxxxxxxxxx
>     <mailto:jon@xxxxxxxxxxxxx>> wrote:
>         Hi Roberto,
>         Welcome!  Thanks for pointing that out about Altium, I learn
>         something
>         new every day!
>         I recommend that you open a merge request for your CADSTAR importer
>         once it is far enough along for people to do some basic tests.  You
>         can mark it as "WIP", but having the MR open early will help get
>         early
>         testing and review so that we can help get it in for V6.
>         Regarding Pad Stacks, @Jeff Young is probably the best person to
>         sync
>         with on the lead dev team as he has recently been doing some of the
>         groundwork.
>         Best,
>         Jon
>         On Sat, Jun 20, 2020 at 9:07 PM Roberto Fernández Bautista
>         <roberto.fer.bau@xxxxxxxxx <mailto:roberto.fer.bau@xxxxxxxxx>>
>         wrote:
>         >
>         > Hi all,
>         >
>         > I'm new to the mailing list. I just wanted to make you aware
>         that I'm starting work on a native Zuken CADSTAR importer for
>         KiCad. I intend to follow a similar approach to @pointhi in the
>         forums for his Altium importer - trying to stick to similar
>         class structure where possible. My "short" term plan is to
>         provide an importer for the CADSTAR PCB archive format (which is
>         an ASCII file that is based on S-expressions). Since I'm doing
>         this in my free time, I expect it will take a few months but
>         hopefully the PCB importer would be ready before KiCad v6
>         feature freeze. Once I have something that sort of works, I'll
>         make a merge request and ask for further feedback on how to
>         improve it.
>         >
>         > Now, on a second note, I'd like to provide some input on Pad
>         Stacks. I joined the mailing list after the last post on the
>         thread "How do we envision Pad Stacks?"
>         (https://lists.launchpad.net/kicad-developers/msg44006.html), so
>         I can't reply to that thread directly, unfortunately. However,
>         the topic discussed in that thread is very relevant to the work
>         I am trying to do with the CADSTAR importer (and I bet also
>         important for the Altium importer @pointhi  made).
>         >
>         > I'd like to point out two small inaccuracies in Jon's message:
>         >
>         > In Altium you can define a full pad stack when editing
>         footprints: Altium uses a default 14-electrical-layer board
>         stackup which is then mapped to whatever layers you actually use
>         in your design when you include the footprint.
>         > You can define a SMD pad in an inner layer.
>         >
>         > Please see attached screenshots from v20.1 showing above two
>         cases, maybe earlier versions didn't allow this?.  More details
>         can be found here:
>         https://www.altium.com/documentation/altium-designer/pcb-prop-padpad-properties-ad.
>         >
>         >
>         > To keep this email short, I've created a document with other
>         bits of information that I feel might be useful (such as how
>         CADSTAR handles Pad Stacks) as well as some suggestions for Pad
>         Stack implementation in KiCad - maybe this could be the start of
>         a more complex design document?
>         https://docs.google.com/document/d/1lxBI7_X_I7pO-nuDHPRVlfRBH24XTmwuuN69o_Bqk3s/edit?usp=sharing
>         >
>         > Since this mailing list is public, I have made the above link
>         view only access, but if you'd like to edit, just request it.
>         >
>         > Please let me know what you think.
>         >
>         > Roberto Fernandez (Qbort)
>         >
>         >
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