Siemens SINUMERIK 840D sl Operating Manual page 226

Creating a ShopTurn program
7.4 Fundamentals
Turning
The turning machining plane corresponds to the X/Z plane (G18).
Face/Face C
The Face/Face C machining plane corresponds to the X/Y plane (G17). For machines
without a Y axis, however, the tools can only move in the X/Z plane. The X/Y coordinates
that have been entered are automatically transformed into a movement in the X and C axis.
You can use face surface machining with a C axis for drilling and milling if, for instance, you
want to mill a pocket on the face surface. You can choose between the forward or rear face
surface for this purpose.
Peripheral/Peripheral C
The Peripheral/Peripheral C machining plane corresponds to the Y/Z plane (G19). For
machines without a Y axis, however, the tools can only move in the Z/X plane. The Y/Z
coordinates that you entered are automatically transformed into a movement in the C and Z
axis.
You can use peripheral surface machining with a C axis for drilling and milling if, for instance,
you want to mill a slot with constant depth on the peripheral surface. You can choose
between the inner or outer surface for this purpose.
Face Y
The face Y machining plane corresponds to the X/Y plane (G17). You can use the face
surface machining with a Y axis for drilling and milling if, for instance, you want to mill a
pocket on the face surface. You can choose between the forward or rear face surface for this
purpose.
Peripheral Y
The peripheral Y machining plane corresponds to the Y/Z plane (G19). You can use
peripheral surface machining with a Y axis for drilling and milling if, for instance, you want to
mill a pocket with a flat base on the peripheral surface or drill holes that do not point to the
center. You can choose between the inner or outer surface for this purpose.
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Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
Turning