Sweep divides body into two (2) parts

[tsquaredesign]

I'm new to Fusion 360, just learning how to model more complex objects. I'm using the sweep command to rotate and twist a very simple feature around a circular path. The command works fine. However, the body created is broken into two (2) parts. 

The file is here: 

https://a360.co/30qahMm

[TheCADWhisperer]

Are all of your sketches fully defined?

Are there any unresolved issues indicated in you Timeline?

Is it the face boundary that you are concerned with (can you post screen capture of issue)?

I walked through the Timeline and did not see anything unexpected (except for underdefined sketches and unresolved sketch issues).

[jhackney1972]

I believe you have your terminology wrong.  The model you share is only one component (what you called a part).  It had two bodies showing which I reduced to one.  I went ahead and moved your timeline marker to the end and then added a Combine command to group all the circular arrayed bodies back into one body.  Your model- modified and save under a different name is attached.  I am not sure I interpreted your desire correctly, please check behind me.   

[tsquaredesign]

Thanks for your reply. I checked the timeline and deleted a few older references that didn't affect the sweep. 

Here's a screen shot of the body Sweep-twist0. As you can see, when i highlight a face, it is uniform the whole way around:

Here is a screen shot of the body Sweep-twist360, which has one (1) 360 twist in the sweep:

I highlighted one (1) face that was "broken" into pieces. I don't know why. The profile used on both bodies is the same. The only difference is that i added a twist angle and the body was no longer uniform. I was not able to use the body to define a single path for a subsequent sweep since the path was broken also. 

[tsquaredesign]

Thanks for your message, but i was working to understand why adding one (1) twist would "break" the face of a body into pieces. I posted another message with additional information. 

The "simple" sweep is Sweep-twist0.

The sweep with a twist is Sweep-twist360. 

I don't want to combine them. I thought making two (2) bodies from one (1) profile would help illustrate the issue. Sorry, i wasn't as clear as i should have been. 

[TheCADWhisperer]

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@tsquaredesign wrote:

I highlighted one (1) face that was "broken" into pieces. I don't know why. 

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Brep

Probably nothing to worry about.

Set to Shaded rather than Shaded with Edges.

[tsquaredesign]

Thanks, but i believe since the faces are "broken" into parts, i can no longer use them to define a uniform path for further edits. The paths are "broken" as well. 

I design hardware and need to have uniform bodies, faces and paths to continue refining designs and adding details that coordinate with the entire body. 

Perplexing....

[g-andresen]

Hi,

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@tsquaredesign wrote:

I thought making two (2) bodies from one (1) profile would help illustrate the issue. 

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Where do  you see 2 bodies?

here´s a path

günther

[tsquaredesign]

Sweep-twist0 and Sweep-twist360 are each bodies. 

Sweep-twist0 has uniform faces. 

Sweep-twist360 has faces which are "broken" into parts. I can no longer use the body to define a uniform path if i want to add details to the twisted face. 

[jeff_strater]

@tsquaredesign - I don't understand the concern here.  Yes, that body is broken up into multiple faces - that is just an artifact of the way the sweep math works.  But, the faces are perfectly continuous across these boundaries, which you can see from zebra stripe analysis:

What do you mean by "I can no longer use the body to define a uniform path if i want to add details to the twisted face."?  Can you show a workflow that does not work correctly with this geometry?

[g-andresen]

Hi,

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@tsquaredesign wrote:

I can no longer use the body to define a uniform path if i want to add details to the twisted face. 

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instead of words

günther

[tsquaredesign]

Thanks for your message. I design decorative hardware. In Fusion, i want to sweep and twist a profile, then add details along the face that i created. However, since Fusion "breaks" the face, it also breaks the edge so I cannot use it as a path to coordinate the new details. 

Here's a screen shot showing an edge that does not extend around the full face:

Now i get two (2) paths along the face and i have to coordinate them manually (which means i'm guessing....). Shouldn't i get just one (1) path along the face so i can add details? When i sweep a profile but i don't twist it, the face has a uniform path that i can use as a path. 

Following is an older design study where i had to guess at putting details along the swept face: 

These are the separate bodies i added, but any changes i make in the other decorative bodies means they will not coordinate:

Thanks again for your help.

Tom

[g-andresen]

Hi,

You write what is not possible for what reasons ever.

Maybe you could consider how the red element in my screenshot was created.

günther

[tsquaredesign]

Jeff,

Just wondering if you have any advice on the sweep issue.

Thanks

Tom