--- In
Homebrew_PCBs@yahoogroups.com, "warrenbrayshaw" <warrenbrayshaw@...> wrote:
>
> Piers Goodhew wrote:
> >
> > Next question:
> >
> > If I flood my current design, I get quite a few "Islands" which cannot
> > be grounded. Is it a bad idea to flood them as you'll induce all kinds
> > of voodoo, or is it perfectly safe?
>
>
> In Eagle if you flood-fill a polygon without first specifying the net the flooded polygon should connect to (like GND ) it will create these "islands".
>
> Have a practice with the Eagle Tutorial (page 56 in Version4), and you will see it won't create the islands if you relate the polygon to GND or any other net before flooding it.
>
> i.e. If an island cannot attach to a net with the same name as that of the polygon then the island isn't created. Just what you wanted.
>
> Additionally if you 'do not' name the polygon then the flood fill will not connect to any points inside the polygon. So what appears as a good flood fill is really a super island not connected to any point. Looks pretty and saves etchchant but not likely what you were after.
>
> Hope this helps
> Warren
I agree, what he said :)