i'm trying to make a section cut along curved surface but i have no idea how to do it (and actually having trouble to explain what i want either .
Basically I want to design a part as below. so say its a rod and one size o it has chipped out element?almost like a wave.
I made my lens and i tried to use swept cut but 1) it does in wrong place and 2) im not sure how to automate my "wave" creation
Here how it looks now but it supposed to be on highlighted edge