How to make different CNC passes (rough / fine)

[Boxkite]

There was a similar question recently.

Follow the two YouTube videos about Fusion 360 mentioned in this topic:

CNC Carving of Topographical Mountain ranges

I downloaded a 4 tiled topographical mountain range map (STL File). The Snapmaker 2.0 CNC carving function with a very fine tip takes 4 days to carve out a L10 CM x W10 CM x H2 CM block of wood. Each tile is 10x10x2 CM and my intent it to carve the 4 tiles then line them up for a complete mountain range. This is a test for doing a much larger set of tiles. To shorten the total carving time, I would like to do a rough pass with a larger/faster bit, then a second finer / slower speed pass for t…

The only issue with multi passes is being able to set the same Z height after a tool change or using tools with a datum ring on the shank.