Circular Ground Pour in Eagle

I have a circular PCB and would like to do a ground pour on the entire thing. I’m thinking I could just draw a rectangle enclosing the circle, and that the fab house would just cut it off. That seems like more of a hack though. I’ve also been experimenting with all of the wire routing options in the polygon mode. That seems to only get me a quarter-circle at a time at best and my skills are not always good enough to match up the final quarter circle when I come around.

Does anyone know how to do a circular ground pour for your PCB in Eagle?

stellios,

Define your board outline on the Dimension layer using the circle tool, then surround your circle with rectangular polygons in the copper layers.

Jon

Magic incantation for the CLI window, to draw a circular polygon (using the current layer and line width, centered on the “mark”, with radius 10 in current grid units):

poly gnd (P 10 0) +180 (P 10 180) +180 (P 10 0);

That translates approximately to “draw a 180 degree arc for the first half of the circle (from 0 to 180 degrees), and then another 180 degree arc from there back to the beginning of the circle.”

(every time I hear people say how clunky EAGLE’s odd GUI/CLI combo interface is, I remember how it can do things like this, too…)

westfw, that was awesome! Thank you so much both. Yes, EAGLE does offer a lot of great features and I’m happy there’s a lot of smart people on this forum who collectively know many of them. I wonder if some kind of photoshop online video course might be worthwhile? I’d certainly be happy watching a little series on lynda.com about using more of EAGLE’s command line interface and writing my own ULPs.