# Adding feature to ellipse surface

Hi -
I am trying to add a cone shape on the 3rd ellipse body but i cant copy it by rotating.

can someone help please - thank you

I have notified the authorities. You should pack light and run to a country with no extraditionâ€¦ (who would try to do such a thing! ).

Could you give us a screenshot with what you are trying to achieve? Show us the 3rd ellipse body?

LOL!
Thanks again
Cheers

If I understand correctly, You are trying to attach nubby things to the outside of your ellipse body? Since it is not uniform body, copying by rotation does not position them on the surface of the body. Is that the problem?

You are correct, that is what i am trying to do but as you said copying by rotation doesnt work. what is the alternative solution for such shape?

Cheers mate

Well plotting points around an ellipse is no trivial matter. How accurate do you need to be is key?

I would approach the ellipse body from the side and create the â€śnubbiesâ€ť around the surface circumference and then copy my objects the other direction or width of the body. If you put the nubbies in a new folder to make selecting them all at once easy peasy!

This might be very tedious depending on how many nubbies you want. All the way round the Ellipse?

You can make a drawing plane off the side of the ellipse to help plot your rows of nubbies around the ellipse.

When drawing lines remember you tangent and perpendicular constraint tools.

I tried that but as soon as i copied them, they didnâ€™t land on the surface and/or tangent to the surface â€¦, have to move the plane 5 to 10 deg to maintain surface contact â€¦ not easy and not accurate (but i can live with lack of accuracy) â€¦ i was thinking must be an easier solution to create a pattern on such surfaceâ€¦ thank you again for your help mate

It might be easier to create a rod slightly larger than the object and send it thru the center then rotate it to the angles needed. Once you have the pattern you need, go back to original sketch and do an offset line the distance from the face of object. Then use that to subtract the excess from both the outside and inside.

Thank you
not sure if i fully understand but thank you very much for your reply.

cheers

Perhaps this might help if perfection isnâ€™t absolutely imperative. Youâ€™ll need to keep the chord short to minimise inaccuracy due to the non circular curve.

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Thanks mate- Thank you very much indeed
I really appreciate your time & support. it is crystal clear now.

Thanks again
Cheers

No problem.

So I did this for learning. I used a vector program and created a 34 sided polygon constrained to a circle and then squashed. Exported and imported in DFX format to get the segmented ellipse. The rest is self explanatory. However I learned something cool when creating construction planes. I was able to create multiple planes at one go. Very cool!

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Thank you for sharing thisâ€¦
This part isnâ€™t quite clear to me as iâ€™m still learning this toolâ€¦

*So I did this for learning. I used a vector program and created a 34 sided polygon constrained to a circle and then squashed. Exported and imported in DFX format to get the segmented ellipse