How do Start Depth and Cut Depth work together?

When you set both a Start Depth and Cut Depth in a toolpath, the Cut Depth will begin at the Start Depth and add to it, so the total depth of cut will equal the Start Depth plus Cut Depth.

For example, setting Start Depth to 6 mm and Cut Depth to 3 mm will result in a total depth of cut of 9 mm.