topic Re: Chamfer edges by rule instead of selection? in Inventor Forum

Chamfer edges by rule instead of selection?

Justin.B. — Mon, 10 Feb 2020 23:02:10 GMT

When 3D printing overhangs, it is useful to chamfer the bottom face to eliminate the need for supports. Is there a way to automatically identify these downward-facing surfaces and apply a chamfer to one of their edges?

Any method similar to a rule fillet, which does not need to be updated manually if the geometry changes?

Re: Chamfer edges by rule instead of selection?

johnsonshiue — Tue, 11 Feb 2020 00:31:31 GMT

Hi! I don't think there is a command to do that. You might consider using Facedraft instead. But, you still need to pick the individual draft faces.

Many thanks!

Re: Chamfer edges by rule instead of selection?

MoshiurRashid — Thu, 13 Feb 2020 13:27:55 GMT

There is nothing "automatic". It fully different depending on orientation while 3d printing and design. It is something you have to handle not the software. 🙂
That's why you are designer. That makes you different than others around you.

Re: Chamfer edges by rule instead of selection?

Justin.B. — Mon, 17 Feb 2020 05:07:07 GMT

That's...just silly. Plenty of features update automatically; it's the whole point of history-based parametric design.

Any time you find yourself doing something overly repetitive, or requiring dozens of clicks, you should absolutely look for a way to let the software handle it, not you. If you're a designer you should spend your time designing.

Or maybe that's what makes me different than others around me...

Anyway here's the solution I came up with, for anyone searching this later. 1) Check the normals of all faces to see which ones are facing down. 2) Find which edges of those faces are shared with the vertical surface. 3) Chamfer those edges where the overhang meets the wall.

https://autode.sk/31Y1eS6

Re: Chamfer edges by rule instead of selection?

MoshiurRashid — Mon, 17 Feb 2020 06:04:24 GMT

1) Check the normals of all faces to see which ones are facing down- Is this part is done manually or by software (like draft analysis)?

2) Find which edges of those faces are shared with the vertical surface- Isn't that a repetitive process and doesn't it require dozens of clicks?

3) Chamfer those edges where the overhang meets the wall- By what? Is there any automatic feature?

Would you please elaborate your suggestions please?

Re: Chamfer edges by rule instead of selection?

SBix26 — Mon, 17 Feb 2020 13:38:56 GMT

He did elaborate his suggestions, with both a part file and a screencast. Download the file he attached, and click on the video link to see how his iLogic solution works.

Sam B
Inventor Pro 2020.2.1 | Windows 10 Home 1903
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Re: Chamfer edges by rule instead of selection?

MoshiurRashid — Mon, 17 Feb 2020 15:37:13 GMT

Sorry, I was unable to see the screecast at that time for my browser and internet issues. Now I'm clear. Got something new to learn.

Thanks.