topic Re: How to split a complex body in Fusion Design, Validate & Document Forum

How to split a complex body

elf_monkey — Thu, 14 Sep 2017 00:52:12 GMT

Please I have been struggling with this all day.

I need to split these two bodies wich I highlight in the screencast.

The form the edges and vertex of this rectangular shape.

The other parts I've been able to split using extrusions and split body commands.

But these two because they are on the vertices I can't find a way to do it.

I tried multiple commands to project the curves on a plane or onto a surface.

Thanks

Re: How to split a complex body

SaeedHamza — Thu, 14 Sep 2017 00:55:41 GMT

Hi,

Nothing is attached

Re: How to split a complex body

elf_monkey — Thu, 14 Sep 2017 00:58:45 GMT

sorry here it is

Re: How to split a complex body

SaeedHamza — Thu, 14 Sep 2017 01:11:55 GMT

Could you please attach your model so that I can show you

Regards

Re: How to split a complex body

SaeedHamza — Thu, 14 Sep 2017 01:15:02 GMT

And does the split need to cut this strip with the highlighted body alone without the surroundings?

Re: How to split a complex body

elf_monkey — Thu, 14 Sep 2017 02:02:00 GMT

Sure

I'll attach the file.

About the slim strip, I want to leave it, It´s part of the frame around the "window"

Re: How to split a complex body

SaeedHamza — Thu, 14 Sep 2017 09:55:54 GMT

I checked your file, and it looks already splitted

Could you please be more accurate about what you need

Regards

Re: How to split a complex body

TrippyLighting — Thu, 14 Sep 2017 10:08:19 GMT

I don't think the way you are mixing solid and surface modeling works out for you in this case. You start with a solid body that you shape by splitting it with a few curved surfaces. I am sure by now you've realized that using T-Splines for these two faces is not very efficient and unnecessary as the surfacing tools in the Patch environment would have provided you with better control.

Then you shelled the solid and part carve away to get to your panels. That requires splitting solids and that's where having a solid body can get in the way.

It is likely better to define the outer shell with surfaces only and for the split you want to do you could simply un-stich the surface body and be done.

One you've got your surfaces you can stitch them together and then thicken.

By splitting these solid bodies you'll be left with a number of little solid body slivers and that can create problems.

Re: How to split a complex body

elf_monkey — Thu, 14 Sep 2017 21:33:39 GMT

Your comments, are extremely helpful. I thought I was almost finished with that part of the model.

I guess I will start again following your guidelines. I'll check some tutorials on PATCH first.

Sadly I haven't found a course that I can take so I won't have to painfully learn trough tutorials to understand the concept of modeling with these different tools.

I had no idea I could be using a "wrong" or less efficient methodology, I believed I was doing ok.

I will model the outer surface with the patch module and un-stich the surface as needed. Then at the end stitch and thicken.

Thanks

Re: How to split a complex body

TrippyLighting — Thu, 14 Sep 2017 21:38:18 GMT

This is not a link to at tutorial but to a class recording at Autodesk University. It should provide you with some guidelines on how the patch workspace works.

http://au.autodesk.com/au-online/classes-on-demand/class-catalog/classes/year-2016/fusion-360/pd20930#chapter=0

Re: How to split a complex body

elf_monkey — Fri, 15 Sep 2017 22:07:19 GMT

I studied the class on video you sent me. I’ll be continuing to study the various classes in the links at the bottom of the page. It´s a pity you cant quite hear the questions asked in the classroom. This guy Claas Eicke explains and uses almost only tspline surfaces. But the way he explains the workflow he uses it's quite good. I suppose there is a moment where you finally understand the concepts from where you can build your skills in an orderly fashion. Regarding this model we are talking about. It is symmetric on both x and z axes as the image I’m sending shows. Do you think it’s best to model only one quarter of the model and later mirror it on both axes once it´s finished? Or as the image shows should I mirror it before I start the slicing and un-stitching? Cheers

Re: How to split a complex body

elf_monkey — Sun, 17 Sep 2017 18:25:20 GMT

Hi Peter.

Would you be so kind as to review the file I'm attaching.

I used the advice you gave me. And after studying the video class you sent me I tried to organize the different processes in groups as the video shows.

Please tell me if the method I followed is correct or what could I do do make it more efficient.

Thanks you so much.

Re: How to split a complex body

TrippyLighting — Sun, 17 Sep 2017 22:02:27 GMT

That looks OK. I personally would not fillet the solid and would remove that last fillet in the timeline. Fusion 360 fillet code can do pretty terrible things to curved surfaces.

In this case it leaves these remnant lines that should not be there. Instead as opposed to missal recommendation I would apply fillets in the sketch and then use that for splitting.

that will avoid this issue.

I'd be interested in what @cekuhnen wold have to say about this approach.

Re: How to split a complex body

elf_monkey — Sun, 17 Sep 2017 23:57:56 GMT

How can I ask @cekuhnen about the issue?