Add a bevel to frame for glasses

[Jacques_Bayman]

I am adding lenses to an FPV box goggle. The fitting of the frame took some time to get it right, but after two 3d printed tests, I am ready to add the bevel for the lens. I was hoping to just use a sweep path along the centre line halfway behind the front and back surfaces. (About 2mm in) but this proved to not work. Even if I use the new surface body as a cutting tool, to split the surface, the bevel does not join up at the ends.

Perhaps I have to start all over,  any help will be much appreciated.

[TrippyLighting]

Please share your model. Export as .f3d and attach to next post, or post the public link to it from the data panel.

[Jacques_Bayman]

Hi

Thanks for teh offer to help. Apologies for taking so long to respond. I have issues with my account, or rather, two student accounts... Still trying to fix. In fact I am not sure which account I am using to reply to your message! I trust that you will accept that I was the original poster!

I am attaching the original file. I have a "sort of bevel" on one side of the lenses, but if you look carefully, you will see it is only good for a short length. I have someone that can cut a plastic diopter for the frame, but I need a constant bevel to fit the lens. My current method is obviously failing, and perhaps I need just a nudge in the right direction. This is the second project where I needed to cut bevels, but for the other project the profile was in 2D, so it was easy enough. This 3D bevel has me stumped...

Regards

[TrippyLighting]

My eyes started bleeding about 3 features into the timeline 🙂

Why would you not make this symmetric about the origin?

Using a fix constraint on splines might be OK, bi it really should not be used on anything else. 

[TrippyLighting]

I've cleaned up some of the mess.

There were a number of tangent constraints missing in the sketches, which is why you ended up with edges in your 3D geometry and then resorted to filleting. It's better to fix the root cause  😉

In general, you pretty much hacked your way through the design and the sweep was the last thing that did not work.

However, I also could not get a sweep to wor, and Fusion 360 returned an error message. In general, on a patch curved through 3D space you can expect some twisting. So I resorted to a more stable surfacing workflow.

If you go through the timeline you should be able to figure out how that was done.

I added 2 user parameters for the width and depth of the lens retention groove.

 

[Jacques_Bayman]

Hi

---

@TrippyLighting wrote:

My eyes started bleeding about 3 features into the timeline 🙂

Why would you not make this symmetric about the origin?

Using a fix constraint on splines might be OK, bi it really should not be used on anything else. 

---

Laziness. I added the design to the canvas. I have very little success using non-fixed constraints in the past. The frame is 3D printed, with the first thing was to make sure it fits the box goggles. So initially I had only tweaked the design until it fitted the goggles. So, yes, very random. 🙂

[Jacques_Bayman]

Thanks so much for the effort - it was much more than I expected! I am basically going to print your design as is, and ask you to tweak a little bit as required. 😋  

I'm rather serious about printing it as is though... And you are right, I hacked my way through with a rather dull axe! I roughly made a frame and 3D printed it to fit the goggles, then tweaked and printed again. (I was lucky on 2nd attempt, the original did not even had "oval" kind of lenses, just a hole that approximate the centre of the lenses.)

However I am lost in your workflow. I am am not 100% sure why you use the number of surface offsets. Although my thinking is that you want two lines close together and then use the "lines" as guides for a sweep similar as to what I did... And then I lost it completely when you used  loft and not a sweep. 😕 I've clicked through the surface delete feature in the timeline to the end a few times, but seriously can't follow the workflow. The result speaks for itself and you did a great job! Would you mind explaining the workflow? Especially the part "So I resorted to a more stable surfacing workflow." I can see I have lot to learn here. (Or if you have tutorial about your method somewhere, I would like to read/watch it!)

That said, it may click tomorrow when I had some sleep!

Regards

[TrippyLighting · Accepted solution]

Here you go:

[Jacques_Bayman]

Hi.

Thank you, thank you, thank you!!! You've gone beyond just helping, but actually taught me something new. I will have to view that video again in future. It is well presented and a bonus to newbies. I've recommended it to Autodesk and accepted as a solution.

Apologies for my slow reply. I had a few days on other projects, a short holiday (we recently opened up after COVID-19) a drone to design and a slit microscope to fix for an optometrist friend. (The same one that is going to cut the lenses for this goggle. )