Andrew,
please don't throw me into the simple nay-sayers, I have my doubts
about whether it could be accomplished amongst a group as diverse as ours,
but it can be done. My concerns would be more for the diverse opinions and
desired features within the library and coming to some consensus on a
standard approach. Would these be IPC standard? With what tolerances
applied? What difference in basic part dimensions constitutes the design of
a footprint variation? Etc..
While the AutoCAD blocks are a good example, I want some coordinate
control in Protel that would match AutoCAD, then boy could we do footprints.
Right now I find the greatest issue with making footprints is simply the
weak dimensional coordination supported in Protel. I would gladly do
footprints in ACAD any day.
Many of us have that tendency to ramble, as long as it is a flow of
thoughts that others can discuss and build on what is the problem with it?
Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com
> -----Original Message-----
> From: Andrew J Jenkins [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, July 24, 2001 12:10 PM
> To: Protel EDA Forum
> Subject: Re: [PEDA] a lib. for everyone
>
>
> On 08:54 AM 7/24/2001 -0700, Brad Velander wrote:
> >Andrew et al,
> > I get the feeling that many people think that there
> would not be too
> >many footprints.
>
> IMO, "too many" is a relative term. 2500 is nothing compared
> to the discrete number of components available, footprint(s) aside.
>
> > How many is not too many? My SMT+ footprint reference has
> >2474 footprints and adds at least 50 - 100 per year. ...
> > Additionally there would be the work of documenting
> such footprints
> >and deriving a naming structure. Whew, a lot of work people.
> Not to mention
> >there will be several dozen opinions about how to construct
> everything based
> >upon biases, opinions, experiences and guidelines.
>
> I agree, it would/will be a daunting task, to be sure, but
> not impossible, by any means. And, while your ref shows ~2.5K
> footprints, as you say, many are used by very few, but also,
> many are probably also obsolete. (granted, I can't say for
> sure, but I have my suspicions...)
>
> As an example, I once created over 100 unique multi-layer
> Autocad blocks in less than a day, most of which included
> much greater levels of detail than the average Protel block.
> Tedious, yes, impossible, no.
>
> However, my main reply point was to the comment "It can't be
> done". It's an irritating statement, that I find is most
> often used by those who are nay-sayers, or those who are
> simply trying to use 1st year psychology to goad a person
> into action by negative reinforcement.
>
> I simply have an annoying tendency to ramble. <g>
>
> regards,
>
> aj
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