On Mon, Feb 21, 2011 at 12:40 AM, Stephan Boettcher <boettc...@physik.uni-kiel.de> wrote: > Russell Dill <ru...@asu.edu> writes: > >> On Sun, Feb 20, 2011 at 10:05 AM, Kai-Martin Knaak <k...@lilalaser.de> wrote: >>> Russell Dill wrote: >>> >>>> I'm just wondering what everyones preferred method of breaking up >>>> power/ground planes is. >>> >>> My preferred method is to break the planes as little as possible :-) >>> IMHO, a continuous copper plane is the best you can get for shielding >>> purposes. If large amounts current need to be canalized, I prefer to >>> guide them in fat tracks rather than polygons. With tracks it is easier >>> to ensure a minimum diameter. >>> >> >> My design has several different power and IO rails, and so it requires >> split power planes.I realize its possible to do with the polygon >> editor, it just seems like it'd be much easier with the line drawing >> tool. > > You want to split a polygon into different nets? Does that work? Even > if you invoke the special magic to not loose isolated parts of the > polygon, will the connectivity check treat them as separate copper and > assign them to different nets? > > I've drawn separate polys for each power/gnd net on my boards. > > Let's see, ok, it does work. I'd still be uncomfortable with such a > layout. >
I haven't had the chance to test it yet, but I just found the magic command that completes the cycle: --- MorphPolygon(Object|Selected) Converts dead polygon islands into separate polygons. If a polygon is divided into unconnected "islands", you can use this command to convert the otherwise disappeared islands into separate polygons. Be sure the cursor is over a portion of the polygon that remains visible. Very small islands that may flake off are automatically deleted. --- So draw a polygon pour that fills the board, then draw traces that clear the desired amount of spacing to split up the planes. Perform a :MorphPolygon(Object), and then delete the traces. Of course, editing is still a bit of an issue. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user