Help with 3D file

[ColdBlooded]

I don't use 3D much and can't figure out how to create what I think is a simple file. Anyone out there that can help me out?

I need to make a part so I can use a bulk head in a 8" tube with a 1/4" wall thickness. I'm cutting it out of 3/8" acrylic. I need a front flange that would look like this " l( " and a back like this "(l " Sorry for the keyboard characters. its the best way I could describe it. That will give me a flat surface inside and outside to mount the bulkhead to. What would be the easiest way to create this in Aspire? Thanks

[steve_g]

Anything like this?
SG

[ColdBlooded]

Yes but just 3/8" thick. Figuring the part should be about 3.5"x3.5" to account for the 8" OD and a 7.5"ID of the tube

[ColdBlooded]

cut the flat way. Not the way pictured. Trying to make a flat flange mount

[steve_g]

More like this?
SG

[ColdBlooded]

That is perfect. Now, how did you do it?

[steve_g]

Brenden…
I did this in SketchUp, trying to verify the scope of the project :).
Now that we have defined the problem, we’ll let someone with Aspire chime in. (I have access to Aspire when I borrow a friends laptop for a weekend.) It looks to me to be a simple “two rail sweep” where the profile desired is “swept” across a couple of vectors that define the edges. If you want to hurry the answer, you might read/watch the aspire tutorials on two rail sweeps…
There’s a good possibility that someone will tell us how this can be done using fluting toolpaths (much faster).
Good luck!
SG

[scottp55]

Steve, Is it the piece on the left he's looking to do?
Easy to do with Fluting toolpath. Dad's here but I'll putz using the 3.5X3.5X .375" and 8" diameter--Is that correct?
How much material needs to be left at bottom of flute?

[steve_g]

Hi Scott!
Actually it's both parts... That way he has flats on the inside and outside of the cylinder.
The concave part has a 8" diameter while the convex part is 7.5"
Thanks for helping!
SG

[scottp55]

Hey Steve, Convex not doable using Fluting Toolpath without using something like Paul Rowntrees FlutePlus. Some Vectric guys and I tried for a project.
Wound up having to do MULTITUDES of offsets or linear arrays and then making each pair of offsets sequentially deeper. Stinks unless it will be cut MANY times.
For the concave section do I have measurements correct?

[scottp55]

If dimensions were correct.

[ColdBlooded]

yes correct measurements and thanks for the help

[ColdBlooded]

What was the process you used to create that part in Aspire

[scottp55]

Brendan, all done using a Fluting toolpath in VCP. In my connections use my E-mail to give me address and I'll e-mail the .crv. Just tried doing the convex with offsets and it's easy to get lost in 15 paired profile cuts.:o
Obviously Messed up and was thinking linear.
Steve, Might the Extrude tool in SB3 work? Never used it:(
Nobody laugh! I'm rushing for when Dad gets back from lunch!! :)

[steve_g]

Aspire two rail sweep will give the best result. Extrude in SB3 hasn’t been working well for me lately… I know that some issues like step down were supposed to be addressed in the latest versions, but I haven’t tried.
SG

[scottp55]

Oh, anybody playing with linear array/fluting. If you copy your first line and offset it/ Node edit the start point to the other side/group/ and THEN linear array. It saves a lot of time and doesn't spend as much time in the air.
Right hand one is way faster.
Thanks Steve.