Peter,
Thanks very much, I understand you can put anything you want in there for a
footprint, I just would like the system to update what IS there and use it,
without any extra work involved. I just used the 3 footprints for the
example of what I was trying to accomplish. Like was stated and tried, if
you put anything in there other than the first footprint defined every time
you do a footprint update with the sync it WILL change the footprint back to
that first one in the pulldown list defined in the part library. I really am
just basically looking for the system to be driven by library and schematic
data. I don't want to have to keep typing anything, I would like the update
schematic or cache to actually take and use the footprint defined in the
part even if it was the
same name part but with the new footprint. My feeling is that update should
work this way. Or at least
give you an option to work this way.
Thanks for the help.
Bob

Robert M. Wolfe, C.I.D.
[EMAIL PROTECTED]
----- Original Message -----
From: "Peter Bennett" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, January 02, 2002 3:48 PM
Subject: Re: [PEDA] Multisheet Problems & Updates etc.


> Bob Wolfe wrote:
> >
> > OK Here is the scenario, I ran through this today.
> > Hopefully I have described it clearly enough.
> > I am running 99SE, SP6 on WIN98 Second Ed.
> > Using the Database structure.
> >
> > Create 3 footprints called KP1, KP2, & KP3 that could be used for this
> > part in a library,
> > Create a part for a contact pattern for a keypad in a library.
> > Part named "KEY"
> > In that part I have defined KP1, KP2 & KP3 as legal footprints for that
> > part,
> > KP1 the 1st on the list then KP2, then KP3.
>
> This defines three easily-selectable footprints for the schematic
> symbol, but it does not mean that these are the only footprints that can
> be used.  When you place a part (or later), you can either use the
> drop-down list to select one of these pre-defined footprints, or you can
> type any footprint name in the box.
>
> <snippage>
>
> > So I create the new footprint KP4 and edit the library for the part KEY
> > to use only KP4 as a footprint, while both databases for board and
library
> > are open.
> >
> > While editing the part in library I select update schematic.
> >
> > Save then go in to schematic, hit part properties and guess what the old
> > footprint, KP1,
> > is what is listed,
> > I can then select the arrow pulldown and see there is a choice for KP4
and
> > once selected it now becomes the only choice for that part. But that
means
> > every unique part needs a global update, that's allot of needless work
in my
> > mind.
>
> Parts that you place after this change will get the new footprint.
> Existing parts will not be changed.  Since the footprints listed in the
> schematic library are not the only permissible footprints for that part,
> I expect it would be quite hard for Protel to decide whether or not to
> replace an existing footprint with the new one. Arbitrarily changing to
> the new "default" footprint could have undesirable effects.
> >
> > Schematic Problem:
> >
> > Problem here is each unique part needs to be touched separately and then
> > globally updated
> > to REALLY change the footprint. Other wise the old footprint will get
put on
> > the board.
>
> Global Editing is your friend!
>
> Using Global Editing, you can easily change all occurances of "KP1" or
> "KP4" without touching all affected parts individually.
>
> > And yes you could then change it in the board but why I already
supposedly
> > updated
> > it in the schematic. Seems like allot of extra useless work.
> > In my opinion the update schematic function does not work properly,
don't
> > know whether Protel intends it to work this way or if it is a bug.
> > You might as well not have this update feature if it will not change
this
> > data in the schematic
> > globally for you automatically.
> > Now for one or two parts this may not be that much extra work but if
your
> > library structure needs to change drastically this is a major issue.
> > Especially
> > in a service bureau environment.
>
> I don't think this is a bug.  I suspect from your use of the phrase
> "legal footprint" above, that you have a slight misunderstanding of the
> function of the footprint fields in the library editor.  As I said
> above, those fields do not define the only "legal" footprints for that
> schematic symbol - they just let you list four that can be easily
> selected.  You can type in any other footprint name rather than using
> one of the pre-defined ones, if you wish.
>
>
>
>
> --
> Peter Bennett
> TRIUMF
> 4004 Wesbrook Mall, Vancouver, BC, Canada
> GPS and NMEA info and programs:
> http://vancouver-webpages.com/peter/index.html
>

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