Help required with Hollowing a odd shape

[thomas-buchan]

Hello 

I have made a speaker box that has an unusual shape as it needs to fit into a specific space, when i try to hollow out the space to allow the speaker to be fitted i keep getting error messages. 

I've selected the face i want to remove and then hollow but i keep getting the:

"The operation failed. Try adjusting the values or changing the input geometry."

Whatever value i put in i keep getting the same error, i'd like it to be a hollow box with the two circle faces open to allow the speaker to be installed. 

If anyone could offer some advice on how to fix this that would be appreciated.

[TrippyLighting]

I've attached the file with what I think you want. I am not going to explain the process. Your design workflow is quite a hack , and that is the reason the design does not shell.

[thomas-buchan]

Hi Trippy, thank you for sending that over. 

I did think it was my workflow, it's not a pretty sight.

I understand you not wanting to go through it all but could you nudge me in the right direction on how you would approach designing this to start with to have a usable workflow?  

I've never worked with flowing shapes like this before but i'll get there. 

[TrippyLighting]

I think if you go through the timeline step-by-step you'll see that I worked with surfaces

I would use a similar workflow to create the shapes from scratch.

[TrippyLighting]

Before doing anything else, you should learn how to fully dimension and constrain sketches.

Blue lines/curves should keep you up at night 😉

There is a bunch of free courses here:

[thomas-buchan]

Hi Trippy 

Thank you for taking the time to post that, i went through the timeline and i can see i was way off the mark, i'll do some more reading and practice more.  

One question, which part of the timeline does it go from a solid to shell, are using surface offsets to create the walls as i see you didn't use the shell command?

Cheers 

[TrippyLighting · Accepted solution]

Correct, I did not use the shell command.

I offset surfaces inward by 2 mm, trimmed them and then stitched them into a solid.

That solid I then Combine-cut from the original model.