How can this detail be achieved in slate

[m_c]

You can buy thin wire, diamond coated scroll saw blades for cutting stone. How about a CNC controlled bed for a scroll saw? Obviously the size you could cut would be limited unless you plan to build the scroll saw from hell.

Where did your example picture come from? Any clues from that source?

I was thinking along the same lines, but with diamond wire.
There was a guy created a big CNC stone cutter over on the Dynomotion forum (might actually of been the Dynomotion board on cnczone)



I mostly remember the KFlop servo tuning, as he had to resort to writing a C program to export the tuning data, as the servos moved too slow for the normal tuning functions to be any use. IIRC the servo plots had to be done over a few minutes, as the typical few seconds gave nothing meaningful for tuning.