topic Re: Fusion 360 PCB Design Copper Pours in Fusion Electronics Forum

Fusion 360 PCB Design Copper Pours

antonio3E6YL — Tue, 03 Jun 2025 09:25:43 GMT

Hi everyone 🙂

I am trying to design (for the first time) a PCB. What I am trying to achieve is something like this:

I have already made the PCB design but can´t figure out how to make this copper pours. When I try to use the Polygon pour command, I can only draw lines and not circles, it is not precise and once done, I still get no copper traces when i push to 3D mode.

Could anyone please give me some advices? 🙂

Thanks in advance and kind greetings

Re: Fusion 360 PCB Design Copper Pours

jorge_garcia — Tue, 03 Jun 2025 19:14:25 GMT

Hello @antonio3E6YL ,

See the attached documents for how to make the ring polygons. Let me know if you have any questions.

Best Regards,

Re: Fusion 360 PCB Design Copper Pours

chuck_toddN7PTC — Wed, 04 Jun 2025 14:11:43 GMT

@jorge_garcia

I tried following the instructions for making a circular and loop polygon. Results are below.

Radius = 10mm

Center = 40,40

Here are my coordinates

1 2 3 4 1

(30 40)(40 50)(50 40)(40 30)(30 40);

The result: (not a circle)

Loop of width 5mm.

Coordinates:

1 2 3 4 5 6 7 8 9 10 1

(40 50)(40 45)(35 40)(40 35)(45 40)(40 45)(40 50)(50 40)(40 30)(30 40)(40 50);

Result: (not a loop)

What am I doing wrong?

BR -Chuck

Re: Fusion 360 PCB Design Copper Pours

jorge_garcia — Wed, 04 Jun 2025 15:40:05 GMT

Hi @chuck_toddN7PTC ,

You didn't do anything wrong, the segments of the polygon that are concave if you click on them you'll see that the inspector shows a property that says angle or curve. What ever number is there make it negative. You'll see the curve change and now go the correct way.

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

Best Regards,

Re: Fusion 360 PCB Design Copper Pours

chuck_toddN7PTC — Wed, 04 Jun 2025 16:15:30 GMT

@jorge_garcia

My loop still doesn't seem to be working.

BR -Chuck

Re: Fusion 360 PCB Design Copper Pours

jorge_garcia — Wed, 04 Jun 2025 18:16:11 GMT

Hi @chuck_toddN7PTC ,

OK, so this is good you got the circular polygon down. Now you have to combine this knowledge with the other image I included which shows you how to make ring (or loop) polygons. It's a pain, I know but it's the only way to do it for now. Once you have the 8 points calculated it's not too difficult to create the ring.

Let me know if you continue to run into trouble.

Best Regards,

Re: Fusion 360 PCB Design Copper Pours

chuck_toddN7PTC — Wed, 04 Jun 2025 19:17:49 GMT

@jorge_garcia

I provided my attempt at a loop in my first post. I'm assuming that the process of entering the coordinates is as follows.

Loop of width 5mm.

Coordinates:

1 2 3 4 5 6 7 8 9 10 11

(40 50)(40 45)(35 40)(40 35)(45 40)(40 45)(40 50)(50 40)(40 30)(30 40)(40 50);

BR -Chuck

Re: Fusion 360 PCB Design Copper Pours

jorge_garcia — Wed, 04 Jun 2025 20:00:59 GMT

Hi Chuck,

Sorry about that, I should have read more carefully. OK so the trick here is in the image the red and green edges cannot line up exactly. They need to overlap by a little so at point 6 add a small offset (39.99 44.99) and at point 7 add the same offset (39.99 49.99). From there continue with the rest of the points.

That should give you the result you want. I also tried it with the offset in the other direction leaving a small gap.

Let me know if you continue to run into problems.

Best Regards,

Re: Fusion 360 PCB Design Copper Pours

chuck_toddN7PTC — Wed, 04 Jun 2025 20:34:52 GMT

@jorge_garcia

Thanks for the help. The instructions are not very intuitive. This information is good to know, may come in handy some day.

Loop of width 5mm.

Coordinates:

1 2 3 4 5 6 7 8 9 10 11

(40 50)(40 45)(35 40)(40 35)(45 40)(39.99 44.99)(39.99 49.99)(50 40)(40 30)(30 40)(40 50);

Grid = 1mm

BR -Chuck

Re: Fusion 360 PCB Design Copper Pours

sfuelling — Fri, 29 Aug 2025 17:53:28 GMT

Hi, I made a simple spreadsheet. You enter the origin, inner and outer radius, and it calculates the coordinate pairs for the 11 points.

I wonder whether that could be implemented as a ULP?

Re: Fusion 360 PCB Design Copper Pours

nodnarb93 — Tue, 09 Sep 2025 10:41:42 GMT

@sfuelling great idea! I made a simple ULP using the forumlas from your spreadsheet as a starting point (see attachment).

It has a simple GUI to change inputs, but I was unable to get signal naming working. For some reason it insists on assigning "CURVE" as the signal name. Maybe a more seasoned ULP'er can figure it out but I ran out of time and patience.

It makes these rings an absolute breeze to create though!

@antonio3E6YL hopefully this helps your future projects, it was an absolute necessecity for mine!

Betreff: Fusion 360 PCB Design Copper Pours

antonio3E6YL — Tue, 23 Sep 2025 08:58:03 GMT

Amazing! Thanks 🙂