Another file here.

In it, I swept the green curves around the magenta letters to make intersecting surfaces, which were then trimmed to leave those as shown.

The next step was to Copy & Paste the 'ridge' curves to make them into the orange curves placed at the surface intersections.

Finally, copies of the orange curves were mirrored below the surfaces to give the blue curves and it is these that can be used directly as toolpaths for an engraving style of machining operation.

If I'd modelled the surfaces to peak in the opposite Z direction it would have saved having to create and mirror the orange curves to get the blue ones, but I just find it a bit easier to do it this way.

Using a Tapered Extrude that trims at the peaks would be an easy & quick way for us to get the right shape, but this isn't possible due to the complexity of such a task.



Martin.