Purpose This Specification provides a standard for the design@ performance requirements@ inspection and procurement for combination machines numerically controlled@ with work positioning@ and tool selection. This is a minimum standard and is not intended to limit or inhibit advanced designs. Classification The machine shall be the following type@ and class of N/C control@ size and group as ordered by the procuring agency. Types: Type I Three-axis machine (X@ Y@ Z) with 369-station index table. Class IV continuous path control. Type II Four-axis machine (X@ Y@ Z and B)@ the B axis controlling a contouring table. Class IV continuous path control. Type III Five-axis machine (X@ Y@ Z@ A@ and B or C). Class IV continuous path control. Sizes: Small - as listed in Table 1 Large - as listed in Table 1