Additive Pipe Won't

[Vagulus]

in Part PA-01-002 I wish to create a pipe elbow between Elbow Seat End Sketch and Elbow Socket End Sketch along Blend Curve which has a ShapeBinder into the part. This should be straightforward but FC pops a Fatal Error message. I can't find anything wrong with the Sketches and I checked and redid the curve and binder.

What have I done wrong this time?

[Vagulus]

I found a misalignment but that didn't fic the problem. Then I replaced the B-spline with a drawn curve.
FC still refuses to sweep either of the ends along the Path.

And - I forgot again:
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/New Zealand (en_NZ)

[Roy_043]

Seems to work fine here.

Code: Select all

OS: Windows 8.1 (6.3)
Word size of FreeCAD: 64-bit
Version: 0.20.26201 (Git)
Build type: Release
Branch: master
Hash: 9f2dd4a363053e87e1b1def0d005ed441d378796
Python version: 3.8.12
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: Dutch/Netherlands (nl_NL)

[Vagulus]

Thanks, Roy. I even tried re-installing FC but that didn't make any difference.
I'll use your version!

[un1corn]

Why do you have the pipe profile at both ends? you only need it once, then select each edge.

[Vagulus]

Why do you have the pipe profile at both ends? you only need it once, then select each edge.

I think you have pointed out why I couldn't get FC to sweep. It's the clicking sequence. I'll have a play with that.
Darned annoying really! I have swept quite a few things without trouble. It's just that today ... ...

[chrisb]

If I recompute Roy's model the pipe vanishes.

OS: macOS 10.16
Word size of FreeCAD: 64-bit
Version: 0.20.26155 (Git)
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: C/Default (C)

[chrisb]

It sort of works if I redraw the the B-spline. However, the result fails CheckGeometry. Roy's model fails as well, but with different messages.

SnipScreenshot-f5643f.png (43.73 KiB) Viewed 1019 times

[Chris_G]

Here, I get a valid solid.
I changed 2 things :
- I inverted the order of the 2 circles in one of the profile sketches
- I moved the normals sketches, used by the blendcurve path to the border of the 2 profiles, so that the sweep path is the shortest / steepest.

To me, this last rule should be applied as often as possible, to avoid self-intersections in sweep.

pipe.png (38.17 KiB) Viewed 1002 times

211027 PA-00-000-chrisg.FCStd

(235.56 KiB) Downloaded 31 times

Code: Select all

OS: Manjaro Linux (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: 0.20.26209 (Git)
Build type: Release
Branch: master
Hash: 13cd1c23eca38683420ce1237d6b56f345366905
Python version: 3.9.7
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: French/France (fr_FR)

[Vagulus]

- I inverted the order of the 2 circles in one of the profile sketches

I forgot about that trick. I have had that problem before. Grrr!

- I moved the normals sketches, used by the blendcurve path to the border of the 2 profiles, so that the sweep path is the shortest / steepest.

That's a good one. Thanks.