HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 497)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
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6.4 W
o
rk
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plan
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6.4 Working planes
Y-axis machining
When programming drilling or milling operations with the Y axis, you
need to define the working plane.
If no working plane is programmed, the Control assumes a turning
operation or a milling operation with the C axis (G18 XZ plane).
G17 XY plane (front or rear face)
Milling cycles are executed in the XY plane, with the depth feed for
milling and drilling cycles in the Z direction.
G18 XZ plane (turning)
In the XZ plane, "normal turning operations" as well as drilling and
milling operations are executed with the C axis.
G19 YZ plane (lateral view / lateral surface)
Milling cycles are executed in the YZ plane, with the depth feed for
milling and drilling cycles in the X direction.