Loft failure -- inner/outer rims crossed

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garya
Posts: 405
Joined: Tue Nov 20, 2018 1:00 am
Location: Ovando, MT, USA

Loft failure -- inner/outer rims crossed

Post by garya »

I'm trying to loft a sketch with two perimeters to another sketch with two perimeters, but the loft always crosses the outer perimeter of one to the inner perimeter of the other,

In the attached file, if you attempt to loft:
Sk_GMF_Rim_Start to Sk_GMF_Rim_Surface
or
Sk_GMF_Rim_Surface to Sk_GMF_Rim_Top

It fails, crossing from the lower outside rim to the upper inside rim.

However, the following succeeds:
Sk_GMF_Rim_Start to Sk_Rim_Top

Is there a better way to do this?
Attachments
Bug_LoftCross_1.FCStd
(30.07 KiB) Downloaded 11 times
garya
Posts: 405
Joined: Tue Nov 20, 2018 1:00 am
Location: Ovando, MT, USA

Re: Loft failure -- inner/outer rims crossed

Post by garya »

Forgot the freecad info:

OS: FreeBSD 11.4-RELEASE-p6 (XFCE/xfce)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.0.19.1
Build type: Release
Python version: 3.7.9
Qt version: 5.15.2
Coin version: 4.0.0
OCC version: 7.5.0
Locale: C/Default (C)
chrisb
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Re: Loft failure -- inner/outer rims crossed

Post by chrisb »

There is no loft in the file. Note that when using inner and outer loops in a loft, you have to draw inner and outer in the same sequence in both (better: all) of the sections.
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edwilliams16
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Re: Loft failure -- inner/outer rims crossed

Post by edwilliams16 »

What will likely fix it is to create the inner and outer outlines in the same order in each sketch.
garya
Posts: 405
Joined: Tue Nov 20, 2018 1:00 am
Location: Ovando, MT, USA

Re: Loft failure -- inner/outer rims crossed

Post by garya »

edwilliams16 wrote: Fri Jun 18, 2021 4:38 am What will likely fix it is to create the inner and outer outlines in the same order in each sketch.
Thanks, that was it.
The middle section (Sk_GMF_Rim_Surface) had the inner rectangle created first; the others had the outer rectangle created first.
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