New to Fusion 360, need help with Combine tool

[forestli]

I would like to combine two solids together but one of them could not be selected by the tool. please reach out to me if you know the solution. TYSM

[jeff_strater]

it looks like one of your bodies is a mesh body.  Combine only works on solid bodies.  You will have to convert the mesh body to a solid BRep in order to combine them.  You can also combine 2 mesh bodies, in the Mesh toolset, if both are meshes.

[TrippyLighting]

Can you share the mesh file?

You might have to zip it before attaching it to a post.

[forestli]

I have gone through a tutorial on turning the mesh into a solid (tutorial link: https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/How-t...) 

it resulted in a bunch of lines covering the shape of the original mesh. is there a way for me to get like a solid in one piece? 

Thank you for helping me and merry Christmas! 

[forestli]

Here is the file 

[TrippyLighting]

Converting this mesh into a BRep is not a good workflow for the reasons you describe.

Also, none of the sides is aligned with any of the origin planes. 

I would completely redesign this from scratch using the native tools in Fusion 360.

[TrippyLighting]

Here's a start. If you can explain what you want to do with the result, tha would help.

 

[forestli]

I am not familiar with fusion but my ultimate goal for this is to make a case based on the existing model. What I am trying to achieve is to convert the mesh model to solid and subtract it to a bigger solid. 

[TrippyLighting]

---

@forestli wrote:

I am not familiar with fusion but my ultimate goal for this is ...

---

My guess is that without getting familiar with Fusion 360, your ultimate goal might just be wishful thinking.

So download the model I had attached to my post, open it with Fusion 360 and see how it was constructed.

Then, you can decide how to move forward and provide some feedback.