Cylinder Layers

[maple15207]

I created a cylinder with many layers. I am trying to sketch a quadrilateral at the top, and extrude it to the bottom.

However, when I get out of sketch mode, the layers disappear. Any ideas why?

Thanks

[jhackney1972]

You have created a Circular Surface with many facets using the Form Tool.  The only sketch is a flat top triangle on one edge.  You can extrude that up along the side, is that what you are looking for?

[maple15207]

No, the cylinder has 12 layers from top to bottom, and they disappear after i finish the quad sketch, like in your image.

[TrippyLighting]

Those aren't "layers, but T-Spline edges, which are also called sections in the UI when you first create the Form.

When you click on Finish form , Fusion is trying to create a BREP or surface body with the least amount of NURBS faces.

You can override that behavior:

[maple15207]

Thanks.

I will need to create that quad prism separately for each vertical and horizontal face. What's the easiest way to do that?

[TrippyLighting]

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@maple15207 wrote:

Thanks.

I will need to create that quad prism separately for each vertical and horizontal face. What's the easiest way to do that?

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That somewhat depends on the end goal of the design. I think that starting with a Form polygon might not have been the best starting point.

[maple15207]

that's easily fixed. Would a triangle make it easier?

[TrippyLighting]

Please describe what it is you want to design, then we can move forward.

[maple15207]

I want to make a twisted pot like this. So, the starting point has each column having the same quad up and down. Each row has different quads than its neighboring rows.

Then each row will be rotated with respect to the other rows leaving the twisted effect. That step I know how to do.

What I need is the starting point.for rows and columns.

[TrippyLighting]

Aha, I would indeed do this with T-Splines only, but admittedly, that isn't everyone's cup of tea 😉

[maple15207]

Thanks much. I ill listen to it when my 3D printer stops making noise. 😉

But I didn't make it clear the modification I want. This pot shows it. Each rib is a different height. That makes it more difficult. I think I could do maybe 6 unique heights or so, and those 6 repeat in various sequences around the pot. I assume having that base set of 6 dimensions would mean more copying instead of having to do each 32 individually. Maybe copy each column several times around the pot?  Still that's a lot of labor. Each column has a different angle (by 12 degrees)

 

Thanks much.

[maple15207]

Can anyone say why when I hit Finish Form I lose the faces?

Thanks.

[TrippyLighting]

Please attach the original Fusion file in .f3d format. That should not need to be zipped!

[maple15207]

Here it is.

[TrippyLighting]

I answered that question in the first screencast I made in the other thread. above. ☝️

If you needed help understanding that screencast, you should have asked about it there!

If you still need help modeling the object from the other thread, you should not have created a new thread!

[Post modified after merging threads into one.  CGBenner 12/4/24]

[maple15207]

Sorry, I was asking a general question as I don't understand this issue. And I watched that video (thanks!) 5 times and I still don't know why your steps did not cause an issue.

[maple15207]

Here is the file of my issue. When I click on close Finish Form, the faces are lost. Why did it not have that issue for u but for it did?

[TimelesslyTiredYouth]

Hi @maple15207 

In Fusion 360, faces can be lost when you press Finish Form after T-splining due to issues with the geometry. Here is my train of thought:

1. Non-Manifold Edges: If edges are shared by more than two faces or if there are open edges, Fusion 360 can't properly convert the T-Spline to a solid body.

2. Self-Intersecting Geometry: Overlapping or intersecting faces can confuse the conversion process, resulting in missing faces.

3. Inconsistent Topology: If T-Splines have uneven vertices or edges (e.g., excessive creases, star points), the surface might not convert cleanly.

4. Invalid Surface Conditions: Very thin or collapsed faces may fail during the solid conversion.

To avoid losing faces:

• Check for open edges or highlighted errors before finishing the form using the Utilities > Repair Body tool.
• Ensure smooth transitions and avoid extreme distortions in your T-Spline model.

With what Trippy said, this is no easy project, and personally, it would take me 3-5 hours of trial and error to perfect something like this, so be sure that no mistakes have been made (not trying to start a bomb)..

Kind Regards

Ricky

[TrippyLighting]

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@maple15207 wrote:

But I didn't make it clear the modification I want.

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No problem. 

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@maple15207 wrote:

But I didn't make it clear the modification I want. This pot shows it. Each rib is a different height. That makes it more difficult. I think I could do maybe 6 unique heights or so, and those 6 repeat in various sequences around the pot. I assume having that base set of 6 dimensions would mean moree copying instead of having to do each 32 individually. Maybe copy each column several times around the pot?  Still that's a lot of labor. Each column has a different angle (by 12 degrees)

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That paragraph makes virtually no sense. Are you sure you understood what I explained in the Screencast?

You simply use fewer vertical segments, maybe 6, or 8 for the (internal) circular symmetry.

Then you insert more vertical edges you can move individually to get the desired ribbed effect.

You do that before you start twisting!

[TimelesslyTiredYouth]

@TrippyLighting @maple15207 
You want to create a pot where each rib varies in height and these variations repeat around the pot in a spiral-like sequence, with a 12-degree offset between each column of ribs?
I like to look at things from different perspectives so:

To achieve the spiral ribbed design as in your original concept, first create the base pot using a Revolve command. Then, design 6 unique ribs of varying heights in the Form Workspace. Use the Circular Pattern Tool to replicate these ribs around the pot, setting the pattern axis to the pot's center and spacing them with a 12-degree offset. For the spiral effect, adjust the Z-offset or incrementally move the ribs upwards after applying the pattern. Ensure smooth transitions between ribs and the pot using Combine or Loft tools. Finally, export the model with high mesh resolution for accurate 3D printing results.
This is what you could do to try and make your design instead if struggling, 

instead of "attempting" to get trippy to do it for you

Kind Regards

Ricky