Feed and Turning Axes on CNC Machines
Location and Designation of the NC axes
CNC milling machines differ in their design with respect to the layout of the working spindles and the location
of the NC axes (see figure 28 and 29). The Z axis is identical with the rotation axis of the working spindle.
The positive Z direction is specified to run from the work part to the tool. Since a three-dimensional Cartesian
coordinate system is used, the other two coordinate axes can be determined by the right-hand-rule.