Recent content by JasonLA

I also think the tear/kidney shaped disc is the way to go. thanks for all of your suggestions.

I am driving a drum head with a rod. The rod goes up and down as the radius of a disc changes length (please see attached PDF). There is a gradual raise of the drum head, and then an abrupt drop. But there is a kink that the rod needs to overcome. Any suggestions on how to achieve this...