What is the maximum surfacing cutting depth

Hi all,
I run a whiteside 1" bit when I surface my spoilboard. At a depth of 0.015.
I need to surface a workpiece board. It has a little bit of a cup to it.
My question is, what is the maximum depth of cut I can do? If I increase the depth of cut do I need to change the feeds and speeds?
One side of the board I had to surface and reset Z 6 times to get flat. I would like to shorten that for the other side if I can.

keep the depth per pass at .015, then increase the overall depth of cut to whatever you need it to be.