OK I hear what you're saying BUT..... I can actually envision how you could create a linear pattern but for the life of me I don't see how you can create some of the other stuff I hear about. Granted, engineering complicated processes is not in my wheelhouse
It's sorta like a wood lathe but instead of wood we cut a rock
Stone spins at a constant rpm
But the diamond stone can accelerate and decelerate at speeds much higher than the stone with infinite linear position in relation to the fixed constantly rotating stone
Since we know where the starting position of the stone and diamond bit we can cross the patterns to create and infinite amount of patterns.
This does involve some complex control calculations and accurate position and speed regulation to create the pattern.
Fortunately the manufacturers create the patterns all we do is program up the machine by selecting the proper patern, dress the stone and run the ski through