Object fabricated from a workpiece machined using a computer controlled machine tool along an asymmetric spiral tool path

An object fabricated from a workpiece machined using a computer controlled machine tool by selecting a region of said workpiece to be removed by a rotating cutting tool and by directing said rotating cutting tool along an asymmetric spiral tool path in said region of said workpiece, which spiral tool path maximizes the portion of said region of said workpiece which is removed by said rotating cutting tool moving along said asymmetric spiral tool path, and by directing said rotating cutting tool along at least one trochoidal-like tool path in a remaining portion of said region of said workpiece which is removed by said tool moving along said trochoidal-like tool path.

An object fabricated from a workpiece machined using a computer controlled machine tool by:

• identifying at least one open region for which a first machining time needed to remove said region is longer than a second machining time needed to divide said region into two independent regions by removing a separating channel by a rotating cutting tool between said two independent regions and removing said two independent regions;
• and
• defining in said region at least one separating channel extending between two points on edges of an external boundary of said region, thereby dividing said region into at least two independent regions.

An object fabricated from a workpiece machined using a computer controlled machine tool by:

• identifying at least one semi-open region for which a first machining time needed to remove said region by employing a trochoidal-like tool path is longer than a second machining time needed to isolate said region by removing separating channels between said region and all closed external boundary segments of said region and removing the remainder of said region;
• and by
• defining in said region to be removed at least one separating channel between said region and all closed external boundary segments of said region, thereby defining a remaining open region to be removed.