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Making a watch case (part11), cutting the ellipsoid into the top section

Making a watch case (part11), cutting the ellipsoid into the top section

To cut the ellipsoid shape into the top ring section I've programmed the ellipse in g-code so that the lathe table will follow this shape. The cut gets incrementally closer to the final cut. In the diagram, above, the solid white lines are the tool paths yet to be followed and the red ones are the paths already done.

On the final cut I increase the lathe spindle speed to give the finest finish.

 

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