Siemens sinumerik 840d Programming Manual page 258

Transformations
7
7.8 Switchable geometry axes, GEOAX
840 D
NCU 572
NCU 573
Sequence
The geometry axis number
In the command GEOAX(n,channel axis...) number
n denotes the geometry axis to which the channel
axis subsequently specified is to be assigned.
Geometry axis numbers 1 to 3 (X, Y and Z axis) can
be used to switch to a channel axis.
n = 0 removes an assigned channel axis from the
geometry axis grouping without reassigning the
geometry axis.
An axis replaced in the geometry axis group as a
result of the switchover can be programmed as an
auxiliary axis after the switchover via its channel
name.
All frames, protection zones and working area
limitations are cleared when a geometry axis is
switched.
Polar coordinates:
Replacement of the geometry axes using the
GEOAX command sets the modal polar coordinates
to 0 analogous to changing the plane (G17–G19).
DRF, NPV:
Any handwheel offset (DRF) or an external zero
offset remain active after the switchover.
Transferring axes positions
By allocating new axis numbers to channel axes
already assigned it is also possible to program a
position change within a geometry axis group.
N... GEOAX (1, XX, 2, YY, 3, ZZ)
N... GEOAX (1, U, 2, V, 3, W)
7-258
810D 840Di
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
Channel axis XX is the first geometry
axis, YY the second and ZZ the third.
Channel axis U is the first geometry axis,
V the second and W the third.
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