About elliptical rings

[Eric Shao]

Hello everyone~
I am a master student in National Taiwan University.
Recently I am studying the tooth shape of elliptical rings .
While googling, I found a comment on a forum which says that "johntolhurst" can provide elliptical rings at any tooth.
I am wondering where can I learn this technique ?
Thank you very much !

 

[John Tolhurst]

An ellipse circumference can

An ellipse circumference can only be calculated to an approximate answer.