Homebrew PCBs

>I would also say the copper pour must be the last step in the 
>process. All traces are finished and the board is basically working 
>before i add a copper pour.

Doesn't have to be with Eagle. By design, the pour doesn't exist when 
you load the saved board. A **repour** will only occur after you use 
the ratsnest command. For all intents and purposes a repour is like 
pouring for the first time. In other words nothing is written in 
stone (or copper).

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> On Fri, 10 Mar 2006 17:33:29 +0100, kilocycles <kilocycles@...>  
> wrote:
> 
> > The writer's description of the copper pour process is not 
completely
> >
> > accurate.  He says to rip up the traces and let the autorouter 
work
> >
> > while doing the pour.  I've never done it that way.  I do the pour
> >
> > (polygon gnd) command *after* my board is completely 
routed...auto,
> >
> > manual or a combination of both sometimes...and I've resized the
> >
> > traces, etc.
> >
> >
> > Cheers,
> >
> > Ted
> 
> 
> I would also say the copper pour must be the last step in the 
process. All  
> traces are finished and the board is basically working before i add 
a  
> copper pour.
> This is for one or two layer boards, if you have more layers with  
> dedicated ground and power planes you would not need to route 
ground  
> traces beforehand.
> 
> I do not know the peculiarities of eagle, since the UI is way above 
what  
> my nerves can take, but it should be the same principle.
> 
> 
> By the way, anyone know advanced PCb layout pages/online 
courses/faqs/...  
> please let us know.
> Someone suggested that analog devices online seminar on PCB design 
a while  
> ago, i watched it but thought it rather poor. The information i 
learned  
> was minimal, and the speaker was really bad (maybe it has to do 
with the  
> transfer/bandwidth limitations).
> I do not know if this is in general a problem with analog courses, 
but the  
> ones by national semi are great in comparision.
> 
> I would like to know more about design considerations concerning 
ground  
> planes / copper pours especially.
> 
> ST
>