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Opening and exporting 3D PCB is INSANELY slow.

Message 1 of 3
66 Views, 2 Replies

Opening and exporting 3D PCB is INSANELY slow.

What is WRONG with this program????

I opened the 3D PCB of my design and it took 3 minutes to open the design. In the meantime, Fusion was at 650% CPU and gobbling up 5GB of memory (its at about 1GB when Fusion is just started).
Then, everything works fine, I can rotate, zoom and work with the 3D PCB just fine.
I then wanted to export a STEP file.
It took 6 minutes!!!! And ended up with a 161 MB file.

This is CRAZY! 
It's not even a very large board. 
Screen Shot 2022-04-15 at 12.02.13.png

I then tried something, despite better knowledge.
I changed to the "RENDER" workspace! LOL
It took about 6 minutes before the view came up.
THEN, I could render fine, it renders almost as fast as any smaller board.

Which lead me to think....
WHY is everything working fine when some "work" is being done locally on my computer, like the rotating, zooming e.t.c. of the 3D PCB. And the actual rendering also works fine.

But every time the cloud stuff at Autodesk is involved, like initially loading the 3D PCB view, exporting to STEP, and switching to the RENDER workspace, things go horribly wrong.

It's not MY connection, I have a 500/500Mbps link, and the rest of the world works just fine.

I think Autodesk have some issues. 
That would also explain the HUGE amount of Library issues I've had the last few days.

So, guys, am I the only one with these problems?
Please speak up.

And @jorge_garcia2 ... HELP! I cannot work like this.
I spend 70% of my workday wrestling Fusion issues, sending bug reports, trying to figure out why my libraries are destroyed by Fusion, redoing layout because air-wires pop up out of nowhere, why this, why that.
I just want to be able to layout PCBs without getting a heart attack!

Message 2 of 3
in reply to: jesper8W75R

Hi @jesper8W75R ,


This is a really nice board. It has nothing to do with your internet connection, startup performance in Fusion is something we are investigating because it keeps coming up and is painful even for us here. This is one of our key goals for the year.

That's a really nice board Jesper, good job. If you are open to sharing it we could use it to help Debug these issues.


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 3
in reply to: jorge_garcia2

I was looking at some online STEP viewers, as I was thinking of sending the STEP file to my customer.
However, they all had a limit of about 30MB file size. One of the paid ones, only allowed up to 100MB, even at their premium version.
That leads me to think that the 161 MB for my model is actually HUUUUGE.
Is that really so?
I do not consider this a large board, and it's relatively sparsely populated.
If this is almost unworkable now, how is it going to go when I make a REALLY large board?

Now, while the generation and export times of the 3D PCB are crazy, the REAL problem is that schematic and layout is getting so incredibly slow.
I always detach the 3D PCB after it is generated, to avoid it affecting the other views (which is apparently doesn't) and to avoid waiting 5 minutes for my design to load when I open it.

Apart from the unspeakable amount of other bugs, it actually worked fine, initially, to design this board.
Then it became slower and slooooowwweeeerrr....

Happy to share the design, Jorge.
I will create a copy of it and send the link to you in a PM.
Thank you.

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