Missing air wire

Dave wrote:

I have a prety much completed board with everything routed and I forgot

a connector. I have similar connectors in the schematic so I copied one

of the others and placed it and made a connection to it. The second pin

of the connector is ground so I copied a grond symbol from elsewhere in

the schematic and connected it to the connector. On the board view only

the air wire to the non-ground pin is showing. The ground pin has no air

wire. All the other ground connections had air-wires before I routed

them. I tried deleting the connector and starting over. The connection

to ground in the schamatic appears complete becasue I can move the

connector or the ground symbol and the connection follows.

I tried "redraw" on the board. No luck. If I try to put a trace on the

board to make the ground connection to the connector pin it complains it

cannot back annotate and it must be done on the schematic which I guess

means the connection is not there.

 

So where is the connection?

 

Sage

 

 

In the sch use info the check the net between the pin and ground symbol.

On the board show gnd or what ever the net name is.

Paul R.

Ok, so the new connection is on net "GND" and all the others are N$26. I guess when I re-routed the originals they got a new name.

So how do I make the new connection go to net N$26 ?

Sage

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Dave wrote:

Ok, so the new connection is on net "GND" and all the others are N$26. I

guess when I re-routed the originals they got a new name.

 

So how do I make the new connection go to net N$26 ?

 

Sage

help name

In sch pick one of the N$26 nets and rename to GND. it should ask

something like this one or all nets?

Paul R.

Ok. In the end that did it but I had to take the long way around.

Since I didn't know when I was going to get an answer to my question I just placed a wire on the schematic from the connector pin to one of the other grounds as a work around insted of havingf a dedicated gnd for the pin. After I got your message I tried the rename command by selecting a wire on one of the ground connections and the command sucessfully changed all the N$26 nets to GND. But I had left the new connector pin still connected to the other ground. I disconnected that wire and placed a new ground symbol for the connector and connected it to the pin. It became N$22 and it would not rename. The error was something like cannot connect N$22 to GND.

I had to go back to the other ground symbol and re-issue the command to rename ALL to GND even though the symbol I was working on was already GND from the last rename. It did change the new connection on the new GND symbol to GND net. So mission accomplished.

Seems to me there a lot of wierd things like this that happen in Eagle that I guess you eventually remember how to work with but it's a bit frustrating for me as a first timer.

THANKS for your help.

Sage

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Dave wrote:

Ok. In the end that did it but I had to take the long way around.

 

Since I didn't know when I was going to get an answer to my question I

just placed a wire on the schematic from the connector pin to one of the

other grounds as a work around insted of havingf a dedicated gnd for the

pin. After I got your message I tried the rename command by selecting a

wire on one of the ground connections and the command sucessfully

changed all the N$26 nets to GND. But I had left the new connector pin

still connected to the other ground. I disconnected that wire and placed

a new ground symbol for the connector and connected it to the pin. It

became N$22 and it would not rename. The error was something like cannot

connect N$22 to GND.

I had to go back to the other ground symbol and re-issue the command to

rename ALL to GND even though the symbol I was working on was already

GND from the last rename. It did change the new connection on the new

GND symbol to GND net. So mission accomplished.

Seems to me there a lot of wierd things like this that happen in Eagle

that I guess you eventually remember how to work with but it's a bit

frustrating for me as a first timer.

 

THANKS for your help.

 

Sage

The supply symbols may complicate things. They have an net name to start

with. If you start a net from a supply symbol it will pick up that net

name. If you start from a pin it takes on the N$# value until you

connect to a net with a different name.

I add the net name label to the nets near the symbol pin.

Paul R.

On Tue, 08 Sep 2009 22:12:45 -0400, Dave <davesage12@rogers.com> wrote:

Seems to me there a lot of wierd things like this that happen in Eagle that

I guess you eventually remember how to work with but it's a bit frustrating for me as a first timer.

It's not a bit frustrating at first, it's incredibly frustrating! But

eventually the methodology will start to make sense.

I can recommend a good book: "Build Your Own Printed Circuit Board" by Al

Williams. My review on Amazon said:

"I've been so confused with Eagle that I was on the brink of giving up, but

not anymore. I've just bought this fantastic book which explains everything

I need, in simple and logical language.

The first 'Eureka Moment' was when I realized what was causing me such

problems, to paraphrase the text in the book: Eagle's style of operation

seems backwards compared with many Windows programs...

If you are having problems getting started, I can't recommend this highly

enough. No connection with the author, just a very happy reader."

Link for news readers:

<http://www.amazon.co.uk/exec/obidos/ASIN/007142783X/dolcetto-21>

Link for forum:

http://www.amazon.co.uk/exec/obidos/ASIN/007142783X/dolcetto-21[/URL]

The weird things I'm referring to are not so much methodology issues. I can handle those. Things like this particular example where you can't rename the net on the symbol you want but you can go to another identical symbol and change ALL (including the stubborn one) is something you can never figure out. You are left with trying every backward workaround you can think of to solve the problem. I find I do this frequently in Eagle.

I'm not complaining, it's just someting you have to persit with and remember that you might have to try various alternatives to accomplish what you expect.

Sage

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My two cents:

Having used Eagle professionally but "casually" since version 3.? I understand the frustration comments. However, in general I have found it to be intuitive for me and I usually find that I didn't follow an example in the Tutorial properly or didn't read the details in the User's guide. I've been plenty frustrated with Windows apps too, so I tend to give Eagle a little more grace.

I found that the power and ground symbols are wonderfully powerful when used as intended. I am personally scared of "power pins" that aren't visible on the schematic and MUST have the correct net name to hook up right.

--

Jeff Rockel

WI, USA

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Browser access to CadSoft Support Forums at http://www.eaglecentral.ca

I agree. It has somehow become intuitive for me after figuring out what works in a particular situation and using that info to think through the next problem. I have only ever googled for solutions and found a good tutorial on making parts on the instructibles website and a few other turorials elsewhere. Now that I've stepped up from the free version to standard. Hopefully the manual when it arrives will be more handy and official insite on how I'm supposed to be using it.

I'm actually doing quite well at it (I think)with not too much experience so I think that says someting for the program.

I'm sure I'll have lots more questions.

Sage

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