The first time I saw a Rose Engine lathe gently rocking back and forth as a fly cutter carved into a piece of African Blackwood, I was mesmerized. The Rose Engine lathe to my thinking was used for incising lines, engraving into metal for use in watch dials and jewelry and precious metal boxes. That engraving work is most widely known as guilloché. This is something different. It is 3 dimensional.
Ornamental Turning is specialized art form unto itself.
The tools used to practice it have much in common with industrial machinery and also plain wood turning. This is an oversimplified statement because with Ornamental Turning, there is always a twist: a complexity of tooling that presents challenging riddles to the users, tools that present an infinity of variations on single themes possible, a high level amount of accuracy that must be used in striving for precision and perfection.
The Rose Engine lathe is the ultimate Ornamental Turning machine.