topic Re: Rotate or Sweep using custom curve in Fusion Design, Validate & Document Forum

Rotate or Sweep using custom curve

cpm64 — Wed, 11 Aug 2021 14:18:31 GMT

Hello,

I'm struggling to create a solid using a custom spline path.

As a beginner I thought revolve can solve my problem - however it is not supporting custom curves.

I tried to use

- Sweep, but the result is somehow strange, with some 'artifacts' below the horizontal plane

- Loft

Any idea how can I achieve this?

Thank you.

Betreff: Rotate or Sweep using custom curve

g-andresen — Wed, 11 Aug 2021 14:28:20 GMT

Hi,

Please show a picture of a real existing object.

günther

Re: Rotate or Sweep using custom curve

cpm64 — Wed, 11 Aug 2021 15:04:17 GMT

Thanks, here it is (a crop of the original, Copyright Dr2005).

. The object is a railcar roof, In the render below is 'swept' about 35 degree but it has the issues I presented above.

Re: Rotate or Sweep using custom curve

barry9UDQ6 — Wed, 11 Aug 2021 15:05:17 GMT

How about patch with guide rails?

Re: Rotate or Sweep using custom curve

jeff_strater — Wed, 11 Aug 2021 16:19:12 GMT

I think I would probably try to model the whole thing (rail car) as a solid Loft. Is there a reason why you are looking at only the roof here?

Re: Rotate or Sweep using custom curve

TrippyLighting — Wed, 11 Aug 2021 18:47:57 GMT

Before you start lofting anything, perhaps it would be a good idea to fully constrain and dimension your 2 sketches.

If this is symmetric. the axis of symmetry should align with the (sketch) origin.

Then, make sure to fix any yellow or red icons as son as the warning appears.

Re: Rotate or Sweep using custom curve

TrippyLighting — Wed, 11 Aug 2021 19:01:24 GMT

Is this similar to what you are looking for ?

Re: Rotate or Sweep using custom curve

cpm64 — Wed, 11 Aug 2021 19:56:57 GMT

Yes, this is it.

I tried a different approach than in initial post, but is time consuming as I need to pay attention to the scaling proportions.Lofted between 2 planes, joined, choose the next 2 planes then loft and so on, very annoying at the side when I needed extra rails to keep the rounded profile.

Here is the result.

If there is a better approach, would you mind to share it?

Regards,

CPM

Re: Rotate or Sweep using custom curve

TrippyLighting — Thu, 12 Aug 2021 01:13:00 GMT

@cpm64 wrote:

Yes, this is it.

I tried a different approach than in initial post, but is time consuming as I need to pay attention to the scaling proportions.Lofted between 2 planes, joined, choose the next 2 planes then loft and so on, very annoying at the side when I needed extra rails to keep the rounded profile.

Here is the result.

If there is a better approach, would you mind to share it?

Regards,

CPM

1 sweep, one loft, 2 fillets. No need to loft these small sections.

Re: Rotate or Sweep using custom curve

cpm64 — Thu, 12 Aug 2021 05:03:17 GMT

Next, fillet to be tested, the curvature must be the same as the one from the box drawing, this is why I wanted to use the box (car body) horizontal plan projection as the roof base shape and revolve it along the spline.