HEIDENHAIN POSITIP 8000 Operating Instructions Manual page 325

Settings | Axes
Reference system on lathes
When machining a workpiece on a lathe, the coordinates entered for the principal
axes X, Y and Z are referenced to the workpiece zero point. During turning the
reference axis is the rotational axis of the spindle. This axis is the Z axis. The X axis
moves in the direction of the radius or diameter. The Y axis is perpendicular to the
X axis and Z axis and is used for machining operations outside the center of the
workpiece. The position of the tool tip is clearly defined by its X and Z coordinates.
The angles entered for the rotary axis (C axis) are referenced to the zero point of
the C axis.
Figure 86: Assignment of the rectangular coordinate system to the workpiece
Designation of the axes on lathes
The following name conventions apply to axes used in turning applications:
Z: horizontal principal axis (saddle)
Zo: secondary axis on manually operated lathes (top slide), parallel to Z and can
be coupled to Z
X: principal axis, perpendicular to Z
C: rotary axis about Z
HEIDENHAIN | POSITIP 8000 | Operating Instructions | 09/2018
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