Fusion & Eagle different copper pours

[ygilpinBAQAF]

I recently exported a PCB from Fusion to Eagle 9.X format. Then after opening the design in Eagle and running ratsnest to fill in the Cu pours I find missing connections. That is the VDD plane isn't connected to some of my IC's which I've circled in blue. If I re-import the design into Fusion the Cu plane connects as it did originally. I enjoy the tight integration between Fusion and Eagle so hopefully this is a simple fix.

  

[Pieter.Jan.Van.de.Maele]

Thanks a lot for reporting this! 

The datamodel for copper pours are a bit different between Fusion and EAGLE so there is always the risk of some translation issues when going from Fusion to EAGLE. I will take this to the team and see if there is anything that is going wrong in the translation.

Was this board designed in Fusion? Also it would be interesting to know what is the reason for trying to import it back into EAGLE? 

Thanks! 

[chuck_toddN7PTC]

I have moved to Fusion with my latest design but others are still using EAGLE. I noticed that in Fusion, the Polypour properties, polypour width and Thermal width can be specified separately. In EAGLE Polypour width is equal to the thermal width.

When I recently exported to EAGLE so that I could have a peer review of my design. It was unusable for a review. There were errors in EAGLE that I wasn't seeing in Fusion.

[Pieter.Jan.Van.de.Maele]

Right. In Fusion now, the polygon width is no longer used to draw (stroke) the polygon fill like it was in EAGLE, it now serves as parameter to control the minimum width. Because of that we are more flexible and can now allow the thermals to be specified separately. 

Unfortunately, given that the the Fusion Electronics Data Model is a more modern version of the EAGLE datamodel, some improvements will not properly translate when exporting to 9.6.2, this also includes new features like Slotted Pads, Via Stitching etc. Because of that I would suggest to ask your colleagues to do the review in Fusion if they are working with files that were designed in Fusion. 

Thanks!

[ygilpinBAQAF]

Sure! Thank you for looking into it.

The board was designed in Fusion (where all the connections are correct). I exported to Eagle since my preferred PCB fab can parse that format and it saves several steps compared to gerber. 

[Pieter.Jan.Van.de.Maele · Accepted solution]

Ok I would definitely caution sending EAGLE files to a fab if they were designed in Fusion since that could result in exactly this issue you are seeing. 

I will let the team know that we might have to consider including a warning in the product to avoid bigger issues with this. 

Thanks for participating, it really helps!