Unwanted vias automatically added

Hi Morten

The generation of the vias will be correct but the placement of the lower

added via needs an answer.

From the HELP > ROUTE

"If you route towards the wire end points of a Differential Pair in a

different layer, and the wires are fully aligned, the proper vias will be

generated automatically."

So your hover/click aligned wire endpoints on a different layer, hence I

would expect vias to be created. The via is placed to retain the clearance

between the pairs so the upper one is placed correctly.The edge of the via

aligns with the edge of its trace.

The lower one normally would have gone vertically down but there may be

another signal it is retaining its clearance from. If that's not the case

then there is a problem.

Attached - The red via is where it would normally go. Probably keeping away

from the vertical blue signal.

Regards

Warren

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Attachments:

On 27.10.2016 01:36, Warren Brayshaw wrote:

Hi Morten

 

The generation of the vias will be correct but the placement of the lower

added via needs an answer.

 

From the HELP > ROUTE

 

"If you route towards the wire end points of a Differential Pair in a

different layer, and the wires are fully aligned, the proper vias will be

generated automatically."

 

So your hover/click aligned wire endpoints on a different layer, hence I

would expect vias to be created. The via is placed to retain the clearance

between the pairs so the upper one is placed correctly.The edge of the via

aligns with the edge of its trace.

 

The lower one normally would have gone vertically down but there may be

another signal it is retaining its clearance from. If that's not the case

then there is a problem.

 

Attached - The red via is where it would normally go. Probably keeping away

from the vertical blue signal.

 

Regards

Warren

There is inconsistancy if diff wires add vias when it meets the same

signal, when single end wires doesn't. I don't really care if its

documented. I think it is wrong.

At least I need a clear explanation why it has to be like that, but I

don't think it exist. We have the shift+click function to add vias on

single end routes, so why not use the same for diff pairs?

On 27/10/2016 7:06 p.m., Morten Leikvoll wrote:

 

There is inconsistancy if diff wires add vias when it meets the same

signal, when single end wires doesn't. I don't really care if its

documented. I think it is wrong.

 

At least I need a clear explanation why it has to be like that, but I

don't think it exist. We have the shift+click function to add vias on

single end routes, so why not use the same for diff pairs?

 

If that's the complete story, then I agree.

Warren

On 10/26/2016 3:14 AM, Morten Leikvoll wrote:

Look at the attached image set

 

1. I am coming in with a diff pair (purple) and I want to end up at the

vias.

 

2. I want to do a stop here and follow the yellow wire in to the via.

 

3. This is the peculiar result I get when I click here. Eagle usually

doesnt add vias automatically, so why does that happen? Not to mention,

why are they offset from the click point?

 

I suspect this issue is related to other weird via behaviour, like the

other threads with title "Grabbing airwires on routing" and "Change

layer issue" written by me.

Hi Morten,

Could you send me an example file of this to play with?

This is one of those things that a video and file makes it really clear

to the devs what the issue is. Considering that there are now more devs

to explain issues to this would be helpful.

Let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia

On 27.10.2016 21:31, Jorge Garcia wrote:

On 10/26/2016 3:14 AM, Morten Leikvoll wrote:

Look at the attached image set

 

1. I am coming in with a diff pair (purple) and I want to end up at the

vias.

 

2. I want to do a stop here and follow the yellow wire in to the via.

 

3. This is the peculiar result I get when I click here. Eagle usually

doesnt add vias automatically, so why does that happen? Not to mention,

why are they offset from the click point?

 

I suspect this issue is related to other weird via behaviour, like the

other threads with title "Grabbing airwires on routing" and "Change

layer issue" written by me.

 

Hi Morten,

 

Could you send me an example file of this to play with?

 

This is one of those things that a video and file makes it really clear

to the devs what the issue is. Considering that there are now more devs

to explain issues to this would be helpful.

 

Let me know if there's anything else I can do for you.

 

Best Regards,

Jorge Garcia

There is not much too it.. This simple board will do it.

Hi Morten,

I've created a bug report for this one with Video.

Let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia

Hi Morten,

I've created a bug report for this one with Video.

Let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia

Hi Morten,

I've created a bug report for this one with Video.

Let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia