Issues with Large CAD Model in Fusion(step) - Memory Optimization?

[blue.eagle19]

I hope someone here can assist me. I'm currently working on a camper van conversion in Fusion. I've received CAD data from the vehicle manufacturer as a .step file. My current challenge is that the model has very long loading times. In active use, it consumes a hefty 36.8 GB of RAM, even though I haven’t incorporated all the vehicle components yet.

My question is: Is there a way to reduce the detail level of the .step file or to combine the entire model into a single body? My main goal is to cut down on memory usage. I'm only using the manufacturer's CAD files to correctly dimension my interior furnishings, not for in-depth analyses or anything of the sort.

 unfortunately I cant share the file, because of an NDA contract with the manufacturer  but any tips or advice would be greatly appreciated! 🙂

Best regards, Sven

[TrippyLighting]

It is a common misconception that making everything into a single body will reduce the file size.

Are you sure this is all true CAD data (Analytic Surfaces, NURBS, BRep) and not triangulated mesh data ? 

I ask because even the complex machines we build at work ( in SW) that have 30,000+ components have that file size.

[blue.eagle19]

Thank  you Peter for the answer 🙂 Is there a way that I can see if the CAD data is an Analytic Surface/ NURBS/ BRep and not a triangulated mesh? And if it is, is there a way to transform it ?

greetings Sven  

[TrippyLighting]

A triangulated mesh or CAD geometry based on such a mesh ( direct conversion form a mesh to a solid or surface model) should be recognizable at first sight 😉

I screenshot of the model would be helpful. 

[blue.eagle19]

That would be an example of it. I would like to show more reluctantly, not that I still get problems because of the NDA. The e.g. is only the bumper as a model and this also consists of 341 individual bodies. if I now extrapolate for the whole vehicle is of course a huge number. Is there a function with which I can make this a solid body? Or the calculation for Fusion can simplify?

[TrippyLighting]

That looks like valid CAD data in for of solid bodies and surface bodies.

Mt recommendation would be to delete all of those bodies you don't need for the conversion. My guess is that this will shrink the file size significantly. It will also require a good few hours to sift through that data.

It might well be possibly that the model contains all fasteners and you might not need to have them included in the model.

The Selection tools in Fusion 360 have quite a few options that can help identify and delete unneeded components an geometry:

[blue.eagle19]

Ok, Thank you. 🙂 I will try this. My thought was to combine this to a whole big bodie, in hope that this is not so calculation intensive for fusion. But couldn´t find a way to do this.