kicad-lib-committers team mailing list archive

[nnn <nnn4000@xxxxx>]

Sometimes footprints are created by modifications of other footprints 
and some users may forget about editing of some footprint properties.
1. Doc - it should be at least prohibited to leave there misleading 
informations.
2. Keywords - requirements of library file format should be reminded 
(lowercase, separated by space - 
http://www.compuphase.com/electronics/LibraryFileFormats.pdf)
3. and 4. Reference and Value - user manual says "Before saving, it is 
also recommended to change the reference or value of the module to be 
equal to
the library name of the module."
5. (!) Attributes - I think it's important to remind in KLC about 
setting proper attributes.
6. 7. 8. Move and Place, Auto Place, Local Clearance Values - the rule 
may be: keep default (Move and Place: Free; Auto Place: 0 and 0,  Local 
Clearance Values: 0)
9. 3D Shape Names - at the moment there are no rules about 3D
11. Text line width - it's easy to forget about applying rule 6.5 to 
text fields
12. Text size - I'm not sure but it seems that default is 1 mm so it 
would be easiest to define as 6. 7. 8.

The most important are Doc, Keywords and Attributes because they can't 
be repaired automatically.



W dniu 12.01.2015 o 23:44, Carl Poirier pisze:
> Hi Michal,
>
> Thanks for your comments. My apologies for not seeing your email at first.
>
> 3 to 8 can be summarized with "using defaults values for footprint 
> properties". My goal is to keep the KLC as simple as possible so any 
> contributor can quickly understand it. 11 is redundant with 6.5 and 12 
> is debatable. In /PCB Design Optimization Starts in the CAD Library/, 
> they mention the nominal height is 1.2mm. I'd go with that.
>
> Carl
>
> On Mon, Jan 12, 2015 at 5:05 PM, nnn <nnn4000@xxxxx 
> <mailto:nnn4000@xxxxx>> wrote:
>
>     I forgot:
>     11. Line width is 0.15 mm also for value and reference (because
>     it's on silkscreen).
>     12. Text size 1 mm (or more? smaller looks bad).
>
>     Maybe not all these rules should be in KLC, but I think that some
>     of them are important (eg setting proper attributes).
>
>     Michał Stec
>
>
>     W dniu 04.01.2015 o 20:22, nnn pisze:
>
>         Library convention doesn't inform how Footprint Properties
>         should be filled. I think it would be good to add some rules
>         to avoid mess.
>         My proposition is:
>         1. Doc
>             Some information that will allow to identify footprint
>         should be provided, eg manufacturer, manufacturers name,
>         datasheet file name. Link to datasheet is not enough because
>         it can be broken in future.
>         2. Keywords
>             Don't use misleading Keywords. Keywords separated with
>         space character.
>         3. Reference
>             Reference should be default (the same as footprint name).
>         4. Value
>             Default: VAL**
>         5. Attributes
>             Follow recommendations from user manual.
>         6. Move and Place
>             Default: Free.
>         7. Auto Place
>             0 and 0 (recommendation from user manual).
>         8. Local Clearance Values
>             Default: 0 (if there is no reason to change it).
>         9. 3D Shape Names
>             Relative path with KISYS3DMOD set to ...
>         /kicad-library/modules/packages3d, path is:
>         LIBRARY_NAME/FOOTPRINT_NAME.wrl
>
>         What do you think about it?
>
>         Michał Stec
>
>
>
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