3 Roses... 2 rotary axis

Three Rose ring Finished ring, my first exploration using a two rotary axis milling set up

Rhino Model Screen shot of model in Rhino the petals and leaves have some thickness here, but only for appearence. The model used for tool paths skipped the thickness for simplicity the roses and vines are 'floating' above the shank to achieve the desired height as determined with a test mill the roses have been compressed along the finger axis, again per a test mill. In this case the adjustment is not the result of difficulties interpreting the screen to wax translation. More a case of compensating for the geometric contortions imposed upon the model. Below is the fully unrolled model ready for tool path generation.

If I were to simply 'unroll' this model none of the undercuts of the flowers or leaves would be cut. Not only does this leave a lot of hand carving the geometry of what is milled is distorted more than is desirable.
To properly handle these undercuts requires that the cutting tool always be perpendicular to the surface. Moving the wax simultaniously in 3 linear and 2 rotary axis gets pretty close to achieving this. Another rotary axis isn't that difficult to add BUT the software to generate a 5 axis tool path is slightly expensive.
A more affordable, and limited solution for the present is to unroll the model twice. In addition to replacing the circumferential X axis with a rotary C, now the Y linear axis is also replaced with a rotary A. Not ideal, but the improved geometry and partial undercuts make the final form easier to visualize when hand carving.
The linear X and Y axis are used only to initialy position the wax blank with respect to the mill's zero ( 0,0,0,0,0) position. Very minor errors here can produce very interesting distortions.

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