Re: gEDA-user: next PCB release - 1.99za vs 4.0

["Bert Timmerman" <bert.timmerman@xxxxxxxxx>]

Hi all, 

> -----Original Message-----
> From: geda-user-bounces@xxxxxxxxxxxxxx 
> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] On Behalf Of Bob Paddock
> Sent: Sunday, September 12, 2010 1:40 AM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: next PCB release - 1.99za vs 4.0
> 
>    In Protel there is a keep-out layer.  A object, square, 
> polygon etc, on
>    that layer prevents traces from being run through that area, either
>    manually or by the auto-router (which sucks so bad I never use it).
> 
> 
> > Hmmm... Can we have multiple keep-outs for a single copper 
> layer, e.g.
> > digital keepout, analog keepout, HV keepout?  That would be 
> very useful!
> >  (Or maybe more appropriate to say "keep-in".)
> 
> 
> Yes, the 'keep-out' should be per layer.  In Protel it blocks 
> all layers which is frequently what you do not want.
> 
> Drawing a contain outline in copper, then remembering to 
> delete it latter, can serve as  pseudo keep-out/in.
> 

IMHO, we should be thinking about keepout as in:

1) traces keepout for copper layers (routing traces is out of bounds here),

2) placing parts op [top, bottom, buried components] in the keepout area for
reasons of clashing with mounting holes, other parts courtyard (real
estate), underlying stripline antennas, diff pair traces and other EMC
reasons.

Just my EUR 0.02

Kind regards,

Bert Timmerman. 



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