Edits to footprint do not show up

[waltercFKW73]

I downloaded the library for the TMP36GT9Z from Snapmagic via Digikey's website.   BEFORE adding it to any design, I brought the library in to Fusion Hub and then chose to edit it to change the spacing between the pads in the footprint.  I made the change and can clearly see them on screen and saved the changed footprint.  However, when I now add this library to a new design the original footprint from the originally downloaded library is shown (which has pads too close together and gives ERC errors).  I have tried updating the library and everything else I know to do to get the edited footprint in to the design and I cannot seem to make it happen.  

[waltercFKW73]

Here is what I see in the Place Components panel for this part.

This is what I see if I click Edit Library from the Place Components line for TMP36GT9Z.

But this is what gets inserted into the 2D PCB.

Which is clearly not the layout in the library!

If go to the 2D PCB and choose Replace, this is what I see.

And if I go to the 2D PCB, select the footprint and choose Edit Footprint from the 2D PCB, I get this which is obviously the footprint I want but not the one showing in the 2D PCB!!!!

And when i save this the 2D PCB does not change. It still have the wrong footprint.

[jorge_garcia]

Hello @waltercFKW73 ,

I hope you're doing well. You are getting bit by the annular ring settings in design preferences. The cause the pads to swell when the component is placed into the design in order to conform to the annular ring settings. The key here is to adjust the annular ring settings so that what is specified in the library wins out. It's likely our most confusing feature and I am thankful that we will soon be replacing it with a more intuitive solution.

In the meantime, check out this article. It will explain how this works. Just replace the word Restring with annular ring and the explanation holds. You'll find these settings under Design Preferences > Annular Ring tab.

https://www.autodesk.com/products/fusion-360/blog/what-you-didnt-know-about-eagle-restring/

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

Best Regards,

[waltercFKW73]

I'll review this but it doesn't really make sense to me that this is the problem.  I tried to move the existing pads over and didn't change them at all.  The footprint looked good in the library when I saved it but it didn't show up in the design when I replaced the part with the new library.

[waltercFKW73]

I read through the article that you sent.  I tried, I really did. But the article is for Eagle and I'm using Fusion 360 and there is nothing that relates what is discussed in the article to what I see in Fusion 360.  I still need help.  

Like I said above, I'm not changing the size or any of the parameters of the pads.  I'm simply moving one from x=50 mils to x=55 mils and the other from x=-50 mils to x=-55mils in the Footprint editor.  I am not making any changes to the center pad.  

[waltercFKW73]

I changed the distance that I moved the pads until the change showed up on the board.   I could never figure out what the article was saying and how it related to the spacing between the pads.   Anyway, I have a working solution now and I look forward to a time when this is not so confusing!   A simple warning that it was overriding the footprint changes would have really been helpful!  I lost a day trying to get this to work!

[jorge_garcia · Accepted solution]

Hello @waltercFKW73 ,

I hope you're doing well. Please make sure that the footprint is still useable, moving the pads to different locations is not the way to solve this. I agree with you that a warning would be helpful and that is part of the improvement plan for this feature.

Remember the pads are swelling because of those annular ring settings. Usually adjusting and lowering the minimum is enough to allow the library settings to win. Just make sure minimum does not go below whatever annular ring specification your manufacturer has. In that dialog just set all the minimums to the same value.

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

Best Regards,

[waltercFKW73]

Thanks, @jorge_garcia.  It's good to know for future designs. In this particular design, moving them slightly will be ok but I can see how that would be a real problem with some footprints.   I look forward to the improvements and hopefully they will be in place before I run into this problem again!!

WC