## ellipsoid

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### ellipsoid

I have a customer that wants me to make an ellipsoid mold. The mold needs to be 3"X28"x28" with a depth of 1 1/2" at the center. I can create a dish that extends from 0" to 1 1/2" at the center. The problem is he needs that slight curve on the outer edge. The only way I could get it, or close, was create a 28" circle with a dot in the center and then use a 2 rail sweep. That created the correct outside edge but gave me a raised center. There must be an easier method.

Thanks

Aaron
aaron1869

Posts: 20
Joined: Thu Oct 01, 2015 1:52 pm
Model of CNC Machine: piranha

### Re: ellipsoid

Try the moulding toolpath. With this bit: http://www.rockler.com/rockler-flattene ... 2-in-shank it will be much faster than using a 3D toolpath. edit: Oops, I think this will leave the raised spot.
2nd edit: Here's the solution: viewtopic.php?f=2&t=26332#p188919

Or add a small pocket to the center to get rid of the raised center.

Also, this tutorial should include the information you need, even though the emphasis is on two sided cutting. https://release.vectric.com/clipart_bowl/

Or, search the forums for "bowl" to see what else pops up.
Good judgement comes from experience.
Experience comes from bad judgement.

FixitMike
Vectric Wizard

Posts: 1577
Joined: Sun Apr 17, 2011 5:21 am
Location: Renton, WA USA
Model of CNC Machine: Shark Pro Plus (extensively modified)

### Re: ellipsoid

A bowl profile will not work.
aaron1869

Posts: 20
Joined: Thu Oct 01, 2015 1:52 pm
Model of CNC Machine: piranha

### Re: ellipsoid

The solution was easier then I thought. What I initially did was correct. All I needed to do was drop the model 1/8" below the top. The bit has just enough curve to create an ellipsoid.
aaron1869

Posts: 20
Joined: Thu Oct 01, 2015 1:52 pm
Model of CNC Machine: piranha

### Re: ellipsoid

The last I knew an ellipsoid was a deformed sphere? Scaling done along one or more of the axis. If there is no scaling, then the object is a sphere. I suppose you could say that a sphere is a special case of ellipsoid.
"If you see a good fight, get in it." Dr. Vernon Jones

TReischl
Vectric Wizard

Posts: 3063
Joined: Thu Jan 18, 2007 6:04 pm
Location: Leland NC
Model of CNC Machine: 8020 Build 48X36X10 RP 2010 Screenset

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