DIYbanter - View Single Post - Request for help finding a cam curve that will have lower maximum contact stress than a Parabolic curve (and link to CAD and JPEG files)

In article ,
says...

The profile with the lowest pressure (with the same load) is a straight.
If you can do that, do that. This is a tangential lobe you will seldom
find in literature, because they are noisy, have huge acceleration and
even more "Ruck" (don't know your technical term, "Ruck" is differential
of acceleration).

Jerk.

Displacement Velocity Acceleration Jerk Snap

I've also seen discussions of Crackle and Pop, the 5th and 6th
derivatives of displacement, but have enough trouble wrapping my head
around the physical effects of jerk without worrying about snap, crackle
and pop.

Ned Simmons