Mesh Section. Sketch Plane? Create plane from mesh section. Move mesh to XY plan

[fundamental4]

Hi all,
I have a mesh and I need to do several steps but I need help.
I don't care about the order of the steps to be done.

- video attached: If I do a Model/Sketch/Mesh/Create Mesh Section I see a new sketch is created "Skectch 2". Where is the plane of this sketch? I can't see in the browser.
- The flat area of the mesh must be Move to the XY plane. So, with this Section I have a "mean" axis (I said mean because it won't be exact. It would be the same tool as Catia V5- Plane definition- Mean through points). Can I create an axis from this line? how? (I'll create later a new axis in the rear area).
- If yes, how can I move this new axis to the XY plane? (goal: flat area of the mesh in the XY plane.

If anyone knows a better strategy it will be thank you.

https://a360.co/2SPM0sn 

Thank you.

[TrippyLighting]

The diagonal across your mesh object measures approximately 0.3 mm. Is that really the size you need ?

Trying to create sketch profiles and then loft to get a solid or surface is likely not going to work or will cause a lot of headaches.

I've converted the triangulated mesh into a T-Spline and then surface using a combination of Instant Meshes and Blender. I scaled the diagonal to be around 300mm. You can edit the T-Spline and re-scale as needed.

[fundamental4]

thank you for your quick answer TrippyLighting.

You are right, 0.3 mm is not the real size. It is my first attempt converting a mesh in a parametric model. My first thought was using sketch profiles and then loft them, but if you say it will be a headhache...I don't have B plan. What is your strategy?

I don't know how to convert the files using Blender, if you know a good tutorial I will thank you.

With the new surface you created, if I do a simple Pull in any of the small surfaces, Fusion 360 is "fried".

And 2nd question, how can I move this design to a flat plane? (say XY).

Thank you.

[TrippyLighting]

I might have misunderstood what you are trying to do.

what is your ultimate goal with this  design ? What are you trying to create ?

Do you want to completely flatten the mesh to a plane, and of so, what would you want to do then ?

Or do you just want the bottom surface to be flattened to a plane ?

Or do you just want to orient the existing mesh for the bottom to be more or less co-planar-to an Origin plane ?

Once this mesh is converted into a solid, or a surface  what would you want to do with it ?

Please answer these questions precisely. While you mentioned that 0.3mm is not what you want, you failed to mentioned what you do want, which is more important if you want me to help you.

[fundamental4]

My final goal is the parametric reconstruction of that object.

My first strategy was to generate some sketches and then loft them. Once the shape was cleaned created, then I would use the caliper measurements to precise the sketches.

On the other hand, in regards of the flat area (as it is flat in real), I want to do both things you said: flattened to a plane, and also make it coplanar with the XY plane. 

Thank you

[TrippyLighting]

What experience do you have in 3D modeling and computer graphics ?

The terms you use in combination with the object in question and the form of data it comes in makes me believe you are very new to this field, so maybe you need to answer a few more questions.

I believe based on some perception you are envisioning a workflow that is not going to end in the desired outcome.

What parameters would you want to change to modify you model ? Length, width ? height ?

I ma not sure you full understand the concept of parametric modeling, because otherwise you would never mention that in connection with a highly triangulated mesh possibly based on a scan of a highly irregular organic object. Parametric modeling and highly irregular organic models occupy diametrically opposed Corners of the modeling spectrum.

Flatten the bottom to a plane is easy. Then it will also will be perfectly aligned yo a origin plane.

I don't understand what you feel you can gain by completely flattering this mesh to a plane. What would you do after wards ?

I asked you this already and also asked you to answer this precisely, so how about it ?

[fundamental4]

Thank you for your help TrippyLighting. 
I'll try to do my best to answer your questions using the more accuracy way (also using an idiom that I don't really dominate).

The mesh is a scan, and I want to make a COVER for this object.
I'm doing my first attempts trying to convert this scan in a solid body. 

I used "parametric" word trying to explain that if I make the design and it is not correct, then I would change the parameter (length, width...) to better adjust the cover, redesigning.

In order to avoid the judgements (that could create wrong, ugly and bad misunderstoods) (I selected the "Beginner" cathegory in the post) instead of talking about "perception", "new to this field"...    I'd thank you your suggestion on the workflow you would use to do this job: starting from this mesh (it is fine for me the 300 mm you scaled) I need to generate a solid body. 
I came to this forum just looking for advice and help.

Parameters I will modify: Length, width  height.
I know parametric and I've seen youtube videos going from scanned objects to parametric bodies.

"...Flatten the bottom to a plane is easy. Then it will also will be perfectly aligned yo a origin plane..." Could you please show me how? The reason: if I want to make 100 operations afterwards, they will be easier if it is in XY plane than it is anywhere.