Complete but incomplete?

On 07/09/16 17:59, Tom Storey wrote:

Working on a PCB design, and Ive completed  the layout, but Eagle is telling me there are seemingly some things that still need to be done.

 

Take the attached screen shot for example. Ive selected a net, which highlights all of the nearby pads/traces etc that are part of it. But there are airwires telling me I still need to connect something?

 

Can anyone tell me why this would be happening, and perhaps how I can get rid of them (short of connecting them the way it thinks I should, which would spoil my design.)

 

Thanks!

I assume you mean that your intent was to have multiple copies of the

same circuit, and your problem is that Eagle wants to connect them all

together? If so, the cause is almost certainly that you copied blocks of

schematic which had named nets. The names are retained in the copy,

which tells Eagle they are the same net (that's how you connect nets

between sheets, for example). You need to go back to the schematic and

rename the problematic net segments to be different.

Note that any net connected to a supply symbol is inherently named by

that connection. If you want your multiple circuits to have independent

power connections then you have to do more work.

On 07/09/16 17:59, Tom Storey wrote:

Working on a PCB design, and Ive completed  the layout, but Eagle is telling me there are seemingly some things that still need to be done.

 

Take the attached screen shot for example. Ive selected a net, which highlights all of the nearby pads/traces etc that are part of it. But there are airwires telling me I still need to connect something?

 

Can anyone tell me why this would be happening, and perhaps how I can get rid of them (short of connecting them the way it thinks I should, which would spoil my design.)

 

Thanks!

I assume you mean that your intent was to have multiple copies of the

same circuit, and your problem is that Eagle wants to connect them all

together? If so, the cause is almost certainly that you copied blocks of

schematic which had named nets. The names are retained in the copy,

which tells Eagle they are the same net (that's how you connect nets

between sheets, for example). You need to go back to the schematic and

rename the problematic net segments to be different.

Note that any net connected to a supply symbol is inherently named by

that connection. If you want your multiple circuits to have independent

power connections then you have to do more work.

Indeed I did duplicate blocks of circuit in my schematic. In this case the parts in question all share the same net name on purpose (+5V in this case, and one between two pads/traces part of the GND net). But although I have connected them all together, and in the screenshot I have highlighted the net named +5V and it has highlighted everything correctly, its still telling me that I need to connect them together. It doesnt seem happy with the way Ive done it, even though it would appear to be valid.

It all checks out in the gerbers that I exported, so maybe its nothing to worry about. Just thought it would be nice to see a full board without any airwires left.