Rotation in a completely non-orthogonal space.

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 From:  Lara (MALA)
11931.1 
Hello, I need an impulse for a "simple" thing:
The profile here is intentionally positioned completely sideways in the space because my design requires it. The goal is to rotate it 90° in its plane. This I cannot achiev with either the kplane or the orient tool.
How can I rotate it 90°?
Mala


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 From:  Michael Gibson
11931.2 In reply to 11931.1 
Hi Mala, there are a couple different ways to do that.

In your case here since the curve's plane is at 90 degrees from the Top view, there will be a "perp" snap that you can use with Transform > Rotate > Rotate axis like this:



If your object plane was not rotated only in the Top view then that "Perp" snap would not be suitable and instead if you build a surface by selecting the closed curve and running Construct > Planar you will then get a "Normal" snap like this:



Also another method is if you make 2 construction lines that start at the same point you can also get a "normal" snap from that too:



- Michael
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 From:  Lara (MALA)
11931.3 
Hi Michael, thanks.
I tried all three options you´ve shown here. Meanwhile I´m familiar with these concepts of rotating.
But - my results were always this: It's not completely identical.



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 From:  pafurijaz
11931.4 In reply to 11931.3 
That because your shape isn't a perfect circles, so that is your main issues.
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 From:  Michael Gibson
11931.5 In reply to 11931.3 
Hi Mala,

re:
> But - my results were always this: It's not completely identical.

The rotated result would only be identical to the unrotated original if it was an exact circle, which your shape is not.

- Michael
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 From:  Lara (MALA)
11931.6 
...ok, MIS TAKE.
I had made a sweep with the notch profile. And then a cut perpendicular to the spline and thought: Looks like a circle > is a circle. WRONG...hmmm´grmpfl...
My idea now is to work with an array. Starting from the two already rotated profiles in a clean side view.
Problem: I would like to place the array profiles where the spline points describe the tight curves. To use them in the sweep. How do I achieve this?







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 From:  Michael Gibson
11931.7 In reply to 11931.6 
Hi Mala,

re:
> Problem: I would like to place the array profiles where the spline points describe the tight
> curves. To use them in the sweep. How do I achieve this?

That's kind of weird thing to do for a couple of reasons.

One is that the control points of a curve are a polyline like this:



Note that some control points are on the curve and some are away from the curve. So placing profiles at each point is not really productive.

Another thing is that it is already built in to the sweep command that it adds more internal profiles for bends. So you're kind of trying to manually reproduce what sweep already does internally.

It could help if I understood why you want to do this, what problem are you trying to solve?

- Michael

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 From:  Michael Gibson
11931.8 In reply to 11931.6 
Hi Mala, if you take just one single profile curve and sweep it, it seems to make it around the bend ok:





Is there something wrong with this result?

- Michael

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 From:  Michael Gibson
11931.9 In reply to 11931.6 
Are you trying to get something like this?

Sweep one circle:



Makes a tube like this:



Boolean intersection the tube with bottom profile to cut away outer part:



- Michael

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 From:  Lara (MALA)
11931.10 
Hi Michael,
Thank you very much for your energy and commitment in dealing with my constructive problems.
More details:
I would like to achieve the following. At the point where the two green profiles are, the sweeps should change or meet, specifically from horizontal to vertical.

This means that the profiles arriving from both sides rotate along their splines. This rotation should begin at the “bend point” when they come from the side with the narrow radius, for example. That is why I would like to place the profiles there.
Is that reasonably understandable?

Mala

P.S.:
I tried to recreate it for illustrative purposes.
What irritates me a little, beyond the actual problem of profile placement at the bending points, is that these sweeps don't work...hmmm....








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 From:  Michael Gibson
11931.11 In reply to 11931.10 
Hi Mala, I'm sorry I'm still not really understanding what you're trying to do but I will keep looking at it.

re:
> What irritates me a little, beyond the actual problem of profile placement at the bending
> points, is that these sweeps don't work...hmmm...

Can you show me a specific sweep that doesn't work?

You've got 12 different profile curves and 4 different rails in your file and it's difficult for me to know which combination in particular is not working.

I tried various ones like this one, works:



Then I tried this one, seems to work:



Tried this one , also seems to work:



- Michael

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 From:  Lara (MALA)
11931.12 
...I am myself looking for a solution for a constructive idea. I have already been able to solve this idea with a few nodes. But it doesn't work here. Perhaps the concept is simply not applicable here.
I want the profiles to rotate so that they meet vertically. However, they start horizontally and vertically. The longitudinal rotation should take place in the bend.
I don't think that's possible. Regardless of where exactly the profiles are placed for the sweep...



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 From:  pressure (PEER)
11931.13 In reply to 11931.12 
Hi Mala,

Is this what you mean? I used Sweep, then Twist, and finally Flow. Extrude would also work for the first step.

- Peer


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