topic Re: Round PCB Errors in Fusion Electronics Forum

Round PCB Errors

Rollmop — Mon, 20 Apr 2020 07:18:33 GMT

Hello,

I am trying to make a round PCB. I create a round profile in a sketch in Fusion 360 and us the 'Create 3D PCB' which works ok.

When I link it to my PCB layout document it comes in as a green circle.

When I drag the components onto it I get a load of dimension errors. and the auto router will not work.

I have tried this on a rectangular PCB using the same process and it works fine

Re: Round PCB Errors

rajat.goel — Sat, 25 Apr 2020 00:50:29 GMT

Hi @Rollmop ,

From the images, it seems to me that the circle is a filled circle and is on a dimension layer. I made this assumption based on green boundary color in rectangular board. For the board area to be defined, only the boundary should be on dimension layer and the enclosing area should not be filled. A circle with width 0 is taken as a filled circle.

Could you confirm if the circular boundary you made had width of 0 or not?

The violation area around parts also seems to be because the system thinks you have put parts on the boundary (Dimension layer) and hence the auto-router also does not seem to work.

Please let me know if this resolved your issue. Thank you.

Re: Round PCB Errors

Rollmop — Mon, 27 Apr 2020 06:18:53 GMT

Hi Rajat,

the board was created from a circle drawn in Fusion 360 design and the profile it produced? so the line can only have a width of zero.

I think this is only a bug that applies to circular boards as I have now found a workaround. if you put a small rectangular cutout in the board it comes in on the right layer and the auto-router works ok.

Re: Round PCB Errors

panpan_fan — Mon, 27 Apr 2020 09:49:56 GMT

Hi @Rollmop

Hope you are doing well.

As you mentioned, the reason of this issue is that the width of circle is zero. The 'circle width 0' is a intended behaviour in Eagle side for silkscreening related behavior. But I think it is a bug when draw Circle as board shape and I have reported it to our Develop team. Sorry for the inconvenience.

Beside the workaround your mentioned, another workaround is that you change the width of the circle in the Properties Dialog (Click on the Solid Circle -> Right Click -> Choose Properties -> Change the width to non-zero value manually)

Then you can use the circle board and do AutoRoute again.

Best Regards

Panpan Fan

Re: Round PCB Errors

panpan_fan — Tue, 23 Jun 2020 03:26:16 GMT

Hi @Rollmop

I hope you are doing well!

Today we release Fusion 360 V2.0.8560 with the fix of this issue, could you please upgrade Fusion 360 and have a try again? I think it will work well now.

Thanks again for posting the issue to us! Hope you enjoy using Fusion 360!

Regards,

Panpan Fan

Re: Round PCB Errors

rajsaranraj738 — Wed, 03 Dec 2025 09:26:32 GMT

I AM ALSO FACING SAME ISSUE

Re: Round PCB Errors

Evert_2N3055 — Wed, 03 Dec 2025 19:02:16 GMT

What issue you are revering to?
Did you try the suggested solution.

Re: Round PCB Errors

rajsaranraj738 — Thu, 04 Dec 2025 03:45:44 GMT

In my design my PCB is round shape, track I can't run, auto routing is
working but after auto routing I can't edit the track, Manuel routing I
can't do it, DRC is restricting the routing , my fusion version is up-to
dated,
What should I do next, how to resolve it.

Re: Round PCB Errors

jorge_garcia — Thu, 04 Dec 2025 16:49:55 GMT

Hello @rajsaranraj738 ,

The solution here is to replace the circle with 2 arcs. That will allow all of the routing engines to behave properly.

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

Best Regards,

Re: Round PCB Errors

rajsaranraj738 — Fri, 05 Dec 2025 02:54:13 GMT

OK, I will try, but my doubt is same design I did in my office system
their is a licensed version, it is working fine,

But in my home I have personal license free license version, it not
working. Causing issue.

Their is any restrictions for free version?

Re: Round PCB Errors

jorge_garcia — Fri, 05 Dec 2025 20:48:23 GMT

Hello @rajsaranraj738 ,

For a circular board the personal limitations would not cause this. The limits of personal now apply specifically to the number of layers(4) and that wouldn't cause an issue here.

Let me know if you continue to run into problems.

Best Regards,

Re: Round PCB Errors

rajsaranraj738 — Sat, 06 Dec 2025 05:17:13 GMT

I did what was you suggest in previous email, that 2 arc method, it is
working good, but in that circle I want small cutout, if I do cutout it
is not working.
Please see the attached image. For your reference.

Re: Round PCB Errors

jorge_garcia — Mon, 08 Dec 2025 18:04:34 GMT

Hi @rajsaranraj738 ,

I hope you're doing well. The image was not attached.

If you need a more sophisticated shape, it may be easier to create the 3D PCB first since you can leverage Fusion's better sketch tools.

Let me know if you continue to run into problems.

Best Regards,

Re: Round PCB Errors

lauri_barnhart — Wed, 10 Dec 2025 17:40:33 GMT

Hello, @rajsaranraj738,

Just checking in—did the responses shared by @jorge_garcia help clarify your question?

If so, please consider clicking the "Accept Solution" button. Doing so helps others in the community easily find useful answers.

If your question still needs more attention, feel free to reply here with an update. This way, other members can jump in with further suggestions or guidance to help you move forward.

All the best,

Lauri | Community Manager

Re: Round PCB Errors

rajsaranraj738 — Thu, 11 Dec 2025 01:18:06 GMT

Sorry for the late reply , please let me check today and clarify you.