topic Re: cant open .step file in Fusion Support Forum

cant open .step file

morteg109NYL8 — Thu, 05 Sep 2024 10:13:37 GMT

I recently hired someone to design a mouse I plan on manufacturing and the .step file won't open. The max file size upload is 71MB so I've uploaded to an online file sharing service here incase anyone wants to play around with it to try and open it. https://easyupload.io/pgykco

Betreff: cant open .step file

g-andresen — Thu, 05 Sep 2024 10:28:55 GMT

Hi,

The file has 486 MB.
Get a manageable one.

günther

Re: cant open .step file

Warmingup1953 — Thu, 05 Sep 2024 10:34:01 GMT

Thats a huge file for a Mouse. What are you trying to do with it?...Just preview?

Re: cant open .step file

morteg109NYL8 — Thu, 05 Sep 2024 20:15:58 GMT

Planning on 3d printing it first then injection molding. But yeah that’s kind of what I figured I’ve worked with CNC machines quite a few times before and have never once seen a STEP this big.

Betreff: cant open .step file

morteg109NYL8 — Thu, 05 Sep 2024 20:17:09 GMT

Not sure how to go about that since I paid someone to make to. He hasn’t received payment yet and obviously if the files not useable I’m not going to pay him but I have no idea what he can do about it if he made it that big in th first place.

Betreff: cant open .step file

g-andresen — Thu, 05 Sep 2024 20:57:12 GMT

Hi,

After excessively long ‘import and loading timesI've never seen anything like it.
Not a cent for it.

(view in My Videos)

günther

Re: cant open .step file

morteg109NYL8 — Thu, 05 Sep 2024 21:16:09 GMT

holly cow. how long did that take you to open?? my GPU is a 3080 TI and I've heard that does 95% of the work opening these files, I waited for over 10 minutes and nothing happened. I think something must have gone wrong when he compressed it into a .rar file cause I can see what remains of the mouse looks good but yeah that's not usable at all.

Re: cant open .step file

HughesTooling — Fri, 06 Sep 2024 14:26:20 GMT

Looking at the video @g-andresen posted it looks like your file is a mesh converted to a faceted surface model, don't know why your designer would do that. Hopefully the design is a solid brep model like you'd create in Fusion and your designer can supply that. Maybe the designer doesn't want to supply that model until you pay, they could just supply you an STL mesh file for now so you can print it, hopefully it would look more like the original rather that what you've ended up with in the STP file.

Have you seen any pictures of the model?

Re: cant open .step file

TrippyLighting — Fri, 06 Sep 2024 14:58:58 GMT

@morteg109NYL8 wrote:

... my GPU is a 3080 TI and I've heard that does 95% of the work opening these files, ...

That is complete nonsense!

Outside of 3D viewport display, the GPU does almost nothing.

Edit: I opened the 3D model in another CAD application and it looks similarly mangled to what @g-andresen is showing in his screencast. Usually, a .stl file doesn't look that bad when converted into a BRep, or surface model in this case.

Of course, I have no idea what terms and conditions you have negotiated. However, if I were to outsource modeling, I would perhaps accept a .STEP model (not converted from a mesh!!!) but I definitely would also request the original CAD format, including the design history of the feature tree.

As this is the Autodesk Fusion forum, I would request a model with a browser with all sketches, construction geometry, etc., and also a timeline with all features used to create the geometry.

I do occasional freelance work for small companies and I would never send them a .STEP model of a converted mesh model unless they specifically request that. I would also definitely check the output o such a conversion with more than one application.

When sending a model, I would clearly communicate what is contained in the file and why!

Re: cant open .step file

morteg109NYL8 — Mon, 09 Sep 2024 07:47:24 GMT

so he did send me a non-corrupted version of the file. it is still ridiculously large at 246MB but I'm not sure what a conversion of a STL mesh is vs just a normal constructed step file. The new one looks like this. I'd imagine this is a converted mesh but I'm not sure. I'm good at 3d printing, not 3d design.

Re: cant open .step file

HughesTooling — Mon, 09 Sep 2024 11:51:23 GMT

I think your designer is converting a model into a mesh then converting the mesh back into a brep model. This is a strange way to share the model, I could understand if the designer only sent you STL files until you pay then send you a surface model in STEP format.

What software is the designer using? Hopefully it is a NURBS modeler and not a mesh only modeler.

Edit. For 3d printing get the designer to just supply a STL file as it will be a lot smaller and ask if at some point is he going to supply a NURBS model.

Re: cant open .step file

TrippyLighting — Mon, 09 Sep 2024 11:51:45 GMT

@HughesTooling wrote:

... Hopefully it is a NURBS modeler and not a mesh only modeler.

If the designer would use a mesh modeler, the the exported mesh would have a distinctly different and character.

Re: cant open .step file

morteg109NYL8 — Mon, 09 Sep 2024 21:06:29 GMT

he's using Fusion 360 I believe. but he never sent me an STL file he sent me that weird mesh in a step format which to me looks like a cheap conversion of an STL file. I'm not sure why that would have done this either.

Re: cant open .step file

morteg109NYL8 — Tue, 10 Sep 2024 20:54:30 GMT

I asked him and he said he is working on a NURBS model for me aswell so hopefully that turns out alright,

Re: cant open .step file

morteg109NYL8 — Wed, 25 Sep 2024 01:56:51 GMT

good news i got the new file and its perfect who knows why he sent a mesh first but the new one sonly 15 MB