Redcutlass wrote on Thu, 10 September 2009 18:23
Hello eagle users,
I am a newcomer to this forum, so here goes "me" on my first post.
First off, I'd like to say that I didn't like Eagle at first, but in a week's time I've grown to like it more and more. Or maybe it's because I know how to use it now. Anyway, I am having a strange problem on my ground layer that even a coworker has never seen. We both think it's some kind of clearance issue, but not sure where to change it, if even it is that.
So, I made a polygon on the bottom layer of my double sided board (pretty high-tech eh?) and named it, appropriately, GND. As soon as I do that, I get an area that is filled in to 0.050" of the contour (edge) of my board. Here is a picture:
Bear in mind that the Isolation and Spacing attributes are set to 0 and 0.01, respectively. I have a large 40 thou gap on each side of the ground plane, so, what's going on?
I think what you are seeing is a classic gotcha. If you read the help about the polygon command it does mention it. Basically, there is nothing for your polygon to connect to so it behaves not as expected.
Plop a via somewhere in your polygon, name it gnd, and then run the ratsnest command to redraw. I bet it will look more like you imagined.
James Morrison ~~~ Stratford Digital
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