I don't know what command use to achieve this

I am trying to model a cap of a bottle, and I would like to cut along the red line, but I am not able to do it successfully. What function do you suggest to use? I can’t think of how to do it. Thank you!!

Hi @franciscoferrario

There are many ways…

One way is to Ribbon the curve. Options : BothSides and ThroughPoint

Then Use BooleanDifference - Keep Solid, subtract Ribbon Srf
… check the direction of the Ribbon Srf ( down in my case to keep bottom
Use Dir command and Flip option if needed.

Or Extrude the Ribbon Srf Up. Option Solid
Then Use BooleanDifference - Keep Solid, Subtract the Extruded Ribbon

Hope this help

Regards
Rodolfo Santos

The Fin command is an alternative to Ribbon which may be useful in some similar situations.

Oh! great Rodolfo, I didn’t know those commands, I’m going to try it !! Thanks for the detailed explanation!

I did not know that function either !!! Thank you very much!!!