DRC overlap for pad in polygon

[lucasmoesch]

I'm trying to use polygon defined custom pad shapes but getting DRC errors, although the pad is fully covered by the polygon.

Polygon:

polygon shape

Pad:

pad shape

DRC error:

DRC error

[Yura.Ivanov.VLuki]

The test site, I understand, is a guide. For it to connect, you must specify the same signal names, otherwise it is the overlay of signals with different names - an error.

What exactly do you want to do?

[lucasmoesch]

I just need pads with a certain border radius which is not possible without the use of polygons. The pad ist defined by a footprint, so there is no "naming" it as the same signal.

I was following the tutorial here: 

https://www.autodesk.com/products/eagle/blog/what-you-didnt-know-about-eagle-arbitrary-pad-shapes/

but as you can see the SMD pad is not "magically" extended in the footprint editor for some reason.

[Yura.Ivanov.VLuki]

[Yura.Ivanov.VLuki]

---

@lucasmoesch  написал (-а): I was following the tutorial here: 

https://www.autodesk.com/products/eagle/blog/what-you-didnt-know-about-eagle-arbitrary-pad-shapes/

but as you can see the SMD pad is not "magically" extended in the footprint editor for some reason.

---

All so. And we draw it in the library editor.

[lucasmoesch]

As I already mentioned, I need a fixed border radius. As a matter of fact, this cannot be accomplished by the roundness parameter, since it's defined as a ratio of the edge length and not a fixed value.

[lucasmoesch]

As already mentioned, I'm using the library editor ("Footprint") 

[Yura.Ivanov.VLuki]

But something went wrong.

[lucasmoesch]

---

@Yura.Ivanov.VLuki wrote:

But something went wrong.

---

Yes. I followed the instruction of the tutorial and as you can see the center of the pad is fully covered by the polygon.

But as soon as I insert the corresponding device into my board file it is recognized as overlap error.

[Yura.Ivanov.VLuki]

Быстренько создал примерное, но никаких ошибок не получил.

Quick created an approximate, but didn 't get any mistakes.

[one-of-the-robs]

Are you actually sure that's a DRC error? All you've given us is a screen shot of a bit of hatching. The default tStop or tCream for the pad would look like that if you have those layers visible. If you look at Yuri's last post, you can see that. Show us the DRC error dialog.

[Anonymous]

Yes, it is a DRC error and it's driving me crazy as well. I just can find any solution on the web. Bizarre that this issue was not taken seriously here.

[Anonymous]

Yes, it is a DRC error and it has been driving me crazy as well for a few hours. Bizarre that this issue was not taken seriously here. I struggled to find a solution on the web until I came across this brief but clear official video from AutoDesk https://www.youtube.com/watch?v=_G0ikZKB_Ss .

A couple of suggestions for future users... actually things that solved my issues:

1. Check that you didn't extend the PADs or SMDs with objects such as rectangles. As illogical as it may seem (a shape is a shape in the real world) Eagle only accepts polygons.

2. Do not draw more than one overlapping polygon. There should be only one polygon encompassing a bona fide PAD or SMD.

[Hendrik_Ba]

Thank you for this explanation, only one of us had to go crazy about this. 😁 Thank you! 😉 

[bandrewsHH3AM]

Another item to note - elaborating on the point from the youtube video about a wire terminating/starting/passing through the pad middle: the polygon for the "top" layer has to surround the middle of the pad ... i added a bunch of splits to my polygons and that got rid of my DRC clearance errors.

--Brian