There are two different coordinate systems used in turning, the
machine coordinate system and the NC Step coordinate system.
Figure 2 – Horizontal and
There are two different systems used in turning, the machine coordinate
system and the NC Step coordinate system. Unless specified otherwise, the
machine coordinate system is also applied to the NC Step. The machine
coordinate system must have the Z-axis pointing away from the chuck and
be collinear with the turning axis. Regardless of the type of NC step being
defined, the sketch of the machining geometry (if it is indeed sketched)
must always lie in the X-Z plane and be completely on the positive side of
When you enter the Sketch mode, the system automatically positions the
model in accordance with the workcell definition.
If the workcell was defined as a Horizontal lathe, the Z-axis points to the right
and the X-axis points up. If the workcell was defined as a Vertical lathe, the
X-axis points to the right and the Z-axis points up.