Fillets in a Corner of two Pads

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dasarne
Posts: 21
Joined: Wed May 19, 2021 6:48 pm

Fillets in a Corner of two Pads

Post by dasarne »

Hello all,
I would like to put a fillet between two pads.
Fillet1.png
Fillet1.png (90.7 KiB) Viewed 1561 times
Can you advise me a good documentation or post here how to do it?

When I do this in the Part Design Workbench I get the following error message:
Fillet2.png
Fillet2.png (99.06 KiB) Viewed 1561 times
When in the Part Workbench it doesn't work either:
Fillet4.png
Fillet4.png (97.78 KiB) Viewed 1561 times
Here is the file:
Fillet-Test.FCStd
(17.48 KiB) Downloaded 26 times
Freecad-Version:

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.26155 (Git)
Build type: Release
Branch: master
Hash: 0926a4148bcff11249fd4f56bc30256102ffe105
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: German/Germany (de_DE)
and
FreeCad 0.19 on Archlinux

Yours
Arne
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papyblaise
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Re: Fillets in a Corner of two Pads

Post by papyblaise »

just do "Refine = True"
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dasarne
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Re: Fillets in a Corner of two Pads

Post by dasarne »

Sorry papyblaise, but ... where can I set Refine = True?

I said so flippantly earlier that Freecat 19 on Ubuntu has the same problem. But that is not true.
Fillet1.png
Fillet1.png (82.99 KiB) Viewed 1502 times
So this might be a bug in FC 20 (under Windows?).

Thanks.

Yours
Arne
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papyblaise
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Re: Fillets in a Corner of two Pads

Post by papyblaise »

ici
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refine = true.PNG
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Shalmeneser
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Re: Fillets in a Corner of two Pads

Post by Shalmeneser »

Your file in the same version do the fillet (selecting Edge12).
I don't understand.
Refine doesn't change anything (but could help in other situation).

Code: Select all

OS: Linux Mint 20.2 (MATE/mate)
Word size of FreeCAD: 64-bit
Version: 0.20.26155 (Git) AppImage
Build type: Release
Branch: master
Hash: 0926a4148bcff11249fd4f56bc30256102ffe105
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: French/France (fr_FR)
Attachments
Fillet-Test_SHALM.FCStd
(21.76 KiB) Downloaded 18 times
drmacro
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Re: Fillets in a Corner of two Pads

Post by drmacro »

Just to be specific.

You have a Part Design Body. A Body represents a single solitary solid. That solid is the accumulation of all operations performed in the Body. Each operation (Pad, Pocket, Revolve, etc.) creates a feature under the Body.

The last feature is referred to as the Tip. The is the accumulated solid. This is also one reason the previous features are hidden.

When you perform a fillet operation on an edge or face it is on the solid, not between the Pads that created it.

I know this sounds pedantic, and may not seem relevant, but, it is important to understand that the features of a Body are not stand alone solids.

So you aren't doing a Fillet between the Pad features.
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
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dasarne
Posts: 21
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Re: Fillets in a Corner of two Pads

Post by dasarne »

If my Windows version of FC 20 is now the only one that cannot create the fillet in the file, the problem is not relevant right? :)
GeneFC
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Re: Fillets in a Corner of two Pads

Post by GeneFC »

Sketch001 is slightly out of position. If the lower left corner of Sketch001 is set to be coincident with the origin the fillet will work. (Since it is already very close I presume that was the intention.)

This problem can be seen if refine is set to true. The shape shows a seam on one side instead of an invisible join.

Capture.PNG
Capture.PNG (5.94 KiB) Viewed 1395 times

Filleting and chamfering often have problems when there are small offsets like that.

Fully constraining your sketches would probably avoid the problem. :?

Gene
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Shalmeneser
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Re: Fillets in a Corner of two Pads

Post by Shalmeneser »

Sketches are not constrained :oops: :x .
Sketch001 is not coincident with the origin !

But the Fillet should work nevertheless.
Attachments
Capture du 2021-10-20 20-47-09.png
Capture du 2021-10-20 20-47-09.png (9.11 KiB) Viewed 1360 times
Capture du 2021-10-20 20-47-32.png
Capture du 2021-10-20 20-47-32.png (7.75 KiB) Viewed 1360 times
heda
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Re: Fillets in a Corner of two Pads

Post by heda »

or just sketch the cross-section...
Snip macro screenshot-80f178.png
Snip macro screenshot-80f178.png (20.17 KiB) Viewed 1281 times
Attachments
Unnamed.FCStd
(13.31 KiB) Downloaded 15 times
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