I have split a body but fusion treats it as one solid body

[dark_warriormgc]

Hi,

So, I have this stl file that I have been working on now, and I had encounter a problem that I cant figure out. So the model is on a hull with the deck attached, I am splitting the main deck so that I can make it into an RC, no the problem comes when I actually separated the hull from the body because even though I cant see any connection between the two, fusion is still treating it as  one solid body. I have spent close to 10 hours on this part alone and it has come into an ugly mess (the separation part). Im providing the file, also if yall can also help me with an idea on how to do this better... please let me know. Or if there is a way for the program to tell me how to find these unwanted connection points. I'm a nube with fusion and a RC hobbyist trying to step up my game thank you in advance.

[TheCADWhisperer]

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@dark_warriormgc wrote:

Hi,

So, I have this stl file... ...an idea on how to do this better... please let me know. ... trying to step up my game ....

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Stl=rubbish 

Forget trying to make someone else’s rubbish look good until you have achieved expert level in Fusion.

[dark_warriormgc]

All I need is to separate these two bodies. I have got a little practice designing stuff in fusion, but this is the first time with an STL. Please help

[TrippyLighting]

For the most part Fusion 360 is not the right software to work with .stl files.

For your purpose of splitting this mesh body you should look at Meshmixer

[jthut13]

Meshmixer is the better tool for handling stl files. The software is free and you can import the model back into fusion after splitting the bodies if you want to work on it there.

[TrippyLighting]

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@jthut13 wrote:

...  and you can import the model back into fusion after splitting the bodies if you want to work on it there.

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... which would be a mostly useless undertaking.

[jthut13]

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@TrippyLighting wrote:

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@jthut13 wrote:

...  and you can import the model back into fusion after splitting the bodies if you want to work on it there.

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... which would be a mostly useless undertaking.

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You're not wrong, haha! There's some stuff you can do if you convert the mesh to a BRep.

[TheCADWhisperer · Accepted solution]

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@jthut13 wrote:

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You're not wrong, haha! There's some stuff you can do if you convert the mesh to a BRep.

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My impression is that @TrippyLighting knows a bit about editing mesh files

I suspect that he knows a bit about Fusion too.

[dark_warriormgc · Accepted solution]

Well Guys I appreciate your help. I figured it out.

So, I decided to make a plane to inspect and moved it millimeter by millimeter following the sweep cut I made between the bodies. It end up being a weird face with no thickness that was connecting the two bodies about .2 mm long. I sketched on it to cut, now a regular split didn't work because (as I found out) had not thickness so I had to draw a shape then pulled through it to cut. And all of the sudden two bodies were created... But I appreciate all the help and patience to understand what I was trying to say.