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Polygons not updating shape and airwires.

8 REPLIES 8
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Message 1 of 9
qubecl
264 Views, 8 Replies

Polygons not updating shape and airwires.

Hi everyone,

 

When using polygons I often (but not always) encounter some problems with airwires. When using ground polygons, for examples, it happens that the gnd airwires between the pads do not disappear when connecting them all with a polygon. It doesn't matter if the polygon fill is active or not, or if I refill them.

All of the airwires of a specific net disappear only if I route a wire between any two pads of the net, and do not reappear if I remove that wire. It's annoyng because I'm not able to identify which pads are really disconnected.

 

See images below, showing what is happening.

Unfill.jpg

Here the polygon is not filled. The edges are visible and shows that the DGND_1 pads are connected, but still the airwieres are present.

 

Filling the polygon does not changes anything, airwires still thereFilling the polygon does not changes anything, airwires still there

Filling the Polygon does not have any effect, airwires are still there.

 

Adding a random line makes the airwires disappearAdding a random line makes the airwires disappear

Adding a wire between any two pads remove the airwires.

 

I haven't find a way to reproduce the error but I've to say I did not researched for it deeply.

 

 

 

Another annoying thing, but maybe it's just me doing something wrong, is that the polygon shape does not automatically changes when routing a wire through it or when placing a component. The update takes place only 

using the command re-fill polygons (see image below). Is this intended? Is there a way to activate automatic shaping and I'm missing it?

shape udpate.jpg

As you can see from the screenshot, the wire routed from the +3.3V_D pad of C7 hasn't changed the DGND_1 polygon shape (I added it whit the polygon filled and the wire was effectively "invisible", buried into the polygon filling). Refilling the polygon creates the right shape around the wire, but to me it seems to be just a workaround.

 

Thanks for your help!

 

Regards,
Lorenzo

8 REPLIES 8
Message 2 of 9
jorge_garcia2
in reply to: qubecl

Hi @qubecl ,

 

I hope you're doing well. The outline that's left behind when you unfill the polygon does not dynamically update, the idea of it is to give you some sense of what the polygon filled previously. If you move a component you'll see that it actually disappears because now the previous filling of the polygon would be invalid.

 

Now in regards to the airwires, often times when these stay behind it's electronics letting you know that probably you have an orphan (polygon island) the picture you posted isn't zoomed out enough to figure out where the break is but if the airwires are staying behind that's the reason.

 

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

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 3 of 9
jesper8W75R
in reply to: qubecl

@qubecl 
I have noticed this too.
It doesn't happen so often, but when it does, it can sometimes be "corrected" by moving a via, or deleting it and replacing it.

One situation where you will very often get this, or a similar situation, is if you have a ground via (or a component with a GND pin), OUTSIDE of your board dimensions, or actually, outside your outer polygon "frame".
Ground vias and airwires will go beserk, with all airwires showing and the vias getting a yellow "X" mark.

Message 4 of 9
qubecl
in reply to: qubecl

Thank you both for your answers.

 

@jorge_garcia2 regarding airwires: in case of an oprphan somewhere on the board, I think that I should have only one airwire running from some point of the orphan to some point of the "main" ground plane. In my case, as you can see, all of the airwires are shown, and this is not very helpful even in the case I hade some orphan, since it become very hard to find it searching for the "right" airwire to be connected. Literally, the capacitor in the screenshot have airwires running between them and from them to the vias, you can see how close they are, there is no way to be an orphan there. If an orphan somewhere else makes all those airwires to pop up it is very annoying.

 

Regarding the polygon outline not updating: as I mentioned in my post, I routed the wire while the polygon fill was active, nevertheless the fill wasn't updated to give space to the wire. I didn't take any shapshot because the wire was "invisible", buried in the ground plane, as I told before. This behaviour does not appear to be ripetitive, in case it happens again I'll take a snapshot to show this to you.

 

@jesper8W75R Thank you for that hint, I didn't realize that it may be fault of pad layng outside the polygon. I found your solution to be valid too, but it does not work every time, while routing a line is guaranteed to "work", for what I've seen so far.

 

Best regards,

Lorenzo

Message 5 of 9
qubecl
in reply to: qubecl

Just a fast post scriptum to show that sometimes the polygons fail to update even when filled, as you can see from the screenshotsImmagine 2022-05-02 152148.jpgImmagine 2022-05-02 152324.jpg

 

I'm not sure if this has something in common with the airwires problem, but at the moment both the issue I've described here are present. The airwires are not updating even when i remove a wire, for example. Every time I remove a segment of a wire it's replaced by an airwire segment. See screenshot below, it may help my poor explaination:

Immagine 2022-05-02 152626.jpg

As you can see I removed the wire and it got replaced by a "segmented" airwire. I do not think this behavior is correct, and I'm sure it is not always the same behavior, since it was not like that when I was working and replying to you this morning.

 

It seems that there is some problem with the live update of the connections in general.

 

Kind regards,

Lorenzo

Message 6 of 9
jorge_garcia2
in reply to: qubecl

Hi @qubecl ,

 

Just out of curiosity, could you take a screenshot of Preferences > Electronics > Misc. It will have a bunch of different checkboxes. I'd like to compare it to my setup to rule out a misconfiguration in those settings.

 

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

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 7 of 9
jesper8W75R
in reply to: jorge_garcia2

@jorge_garcia2 @qubecl 
I haven't seen that segmented airwire issue, but I have had this non-updating polygon thing happen a few times.
Not sure if it's the same issue, there is thousands of bugs in Fusion.
For me, sometime, Fusion would simply stop updating the polygon fills.
RATSNEST'ing or turning fill on/off will not bring it back. 

 

I reported this to support, Case ID: 18862746

 

When I told support that a restart of Fusion made things work again, the case was marked as "Solved".

Oh? Solved? LOL
Thank you, Autodesk.  GREAT way to handle our support requests.
No frigging wonder bugs are never fixed.

Message 8 of 9
qubecl
in reply to: jorge_garcia2

Hi @jorge_garcia2 

this is the screenshot you asked for

Immagine 2022-05-04 145736.jpg

 

I've to say that a misconfiguration in the checkboxes does not look like a possibilty to me. If so, this strange behavior should be always present, since I've not checked or unchecked anything in the last months.

Since the behavior is not always present, but Fusion just start to behave like that at some point during my work, I'm more of the idea that it is just a bug.

 

Regards,

Lorenzo

Message 9 of 9
jorge_garcia2
in reply to: qubecl

Hi @qubecl ,

 

Thanks for sharing the screenshot, you are correct it looks fine so has nothing to do with the current situation. I'll pass this along to our developers for review.

 

Thanks for bringing it up.

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.

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