I'm machining some cool 3d parts and some sections have odd cutter marks.
It's as if the ball nose end mill is cutting at slightly different depths.
You can see them but barely feel them with your fingers.
I'm guessing less than half a thou.
Interesting that their location is at the point where there is a double step.
Plain round sections are flawless.

I'm using a 1/4" 2 flute ball end mill sticking out 1.35" from the tool holder.
6000rpm (max), 0.005" cut depth, 0.005" stepover at 24ipm.
Wondering if its cutter vibration or is my Mini Mill worn out?

Timothy