gene glick <[email protected]> writes: >> This is the board: >> >> http://www.ieap.uni-kiel.de/et/people/stephan/solo/eda/erena/erena.pcb >> >> Any idea if it is a good idea to just ignore these violations? >> > > Blindly ignoring violations is probably not a good idea. Better to > understand them first.
Well, I visually scanned the perimeter of the violating planes and did not find any problems, OTOH, Peter did see them, he said, so I need to look more carefully. > I hope you don't think I am picking on you, and maybe I am mis-reading > the design, but I think there's a bunch of stuff wrong: > > 1. You have silkscreen printing going right through most of your > pads. How do you plan to solder to that? The silk is not going to be printed, it is only for the assembly drawing. I gave up on silk at this density. For a dense flight board I once had the silk printed, but without the names, and masked by the soldermask layer. > 2. Many of your parts are placed *extremely* close together. > Certainly a pick and place machine won't be able to handle it. Hand > placing may be difficult. I'm not sure if you'll be able to solder to > them. Well, yes, we will manage ... but If I go for 0402s instead of 0603s, the techs will complain even more. > 3. On the signal layer, you have a big copper ring going along the > perimeter, unconnected to anything. That is not a good idea. Maybe > you intended this to be a ground guard ring? If so, it should connect > to ground. It is connected. It is the power return for the front-end, going from one connector (power board) to the other (premap board). So, it is actually on ground potential, when the front end is plugged in, and there is a resistor (R3) on this board for when it is not. > There's more. Have I misunderstood your layout? Thank you very much for you review! I need to go now, when I am back later today I will tell you what the board is supposed to do. -- Stephan _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
