New to Fusion 360. Struggling with a design--cutting a specific kind of window in a tube

[user74937]

I'm super new to Fusion 360 (10 hours maybe?), and so perhaps what I'm asking is super easy. But man, I struggled with this for a good 6 hours, and have mostly failed.

Given: A mostly hollow tube, I want to make a cut extrusion through it at a specific place, and at a specific angle. If, later, I find that geometry to be slightly off and I wanna tweak it by point-something mm, I want to be able to do that too.

That's super confusing, I'm sure, so I've made some images.

I basically want to make the circle feature. In cross section, it looks like:

I was able to make the following:

But my placement was a little off. But I wasn't able to modify the underlying sketches to shift things. They seem locked in place. And I'm sure that how I accomplished the job was super janky.

(For those curious about the purpose, I'm trying to make an instrument mouthpiece like a recorder or tinwhistle. Small changes to the blade geometry can have big effects in the resulting sound, so I'm going to probably need to tweak the final result dozens of times--completely redoing it from scratch every time seems like an exercise in frustration)

If anyone can help me learn how to accomplish this, it would be HIGHLY appreciated!

[jhackney1972]

You need to attach your model so the Forum users can take a direct look.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

[user74937]

Can do! Please see attached.

[TrippyLighting · Accepted solution]

Here is how I would approach this design:

[user74937]

I'm playing with it in Fusion 360 now, and trying to educate myself on how you did what you did. Thank you so much for the speedy response. I'm able to move the geometry of the windway hole around, which is exactly what I needed in a practical sense, though I was looking more for "how do I do this?" instead of someone basically doing it for me 😄

That said, your design and sketches are very straight forward, and I'm beginning to get a big more understanding, so your solution is also very helpful in helping me become more self-sufficient in that regard, too! I appreciate the speedy assistance!

[gregHSPPD]

Thanks again! Your redesign of the underlying sketches was really the push I needed! I was able to perform all of the tweaking I needed for rapid prototyping and was able to complete a successful and print of the instrument head this evening!

[Drewpan]

Hi,

I'm glad you got a solution to your problem. Here is a bit more advice.

The are Gurus in this forum, and there are beginners in this forum and there are everyone in between and we

all try to help each other. Getting started can be a steep learning curve even if you are already familiar with

other CAD software.

I found that the best way to learn this software is to hit the tutorials in the documentation first. They are all good

and get you started. Then do the Self Paced Learning tutorials provided by AutoDesk on this site. Finally, hit the

YouTube pages for AutoDesk Fusion and some of the Gurus here like @TheCADWhisperer.

It is a lot of work but trust me, it is a great way to start your learning journey with this software. After that and

even during, draw often. If you run into trouble, see Rule #1 and Rule #2 in the Forum, then post your question

with a picture and the original file. The Gurus will get onto it and help is usually swift. Be humble if the Gurus point

out something you are doing wrong, it is CONSTRUCTIVE criticism, not a personal attack, and be willing to learn and

enjoy.

Hope this helps.

I tell people this a lot. Maybe I should suggest it to be Rule #? (0 because it comes before you should do

the other stuff, or 3 because it comes after the original two Rules. Meh?)

Cheers

Andrew