Siemens SINUMERIK 840D sl Function Manual page 527

machining is done before the rotational center point (linear axis in positive traversing range),
for
MD24911 $MC_TRANSMIT_POLE_SIDE_FIX_1 = 2
or
MD24951 $MC_TRANSMIT_POLE_SIDE_FIX_2 = 2
behind the rotational center point (linear axis in negative traversing range).
Transformation selection outside pole
The control system moves the axes involved in the transformation without evaluating
machine data MD24911 $MC_TRANSMIT_POLE_SIDE_FIX_t. In this case, t = 1 stands for
the first and t = 2 for the second TRANSMIT transformation in the channel.
7.2.7 Working area limitations
Starting position
When TRANSMIT is active, the pole is replaced by a working area limitation if the tool center
point cannot be positioned in the turning center of the rotary axis involved in the
transformation. This is the case when the axis perpendicular to the rotary axis (allowing for
tool offset) is not positioned on the same radial plane as the rotary axis or if both axes are
positioned mutually at an oblique angle. The distance between the two axes defines a
cylindrical space in the BCS in which the tool cannot be positioned.
The illegal range cannot be protected by the software limit switch monitoring function since
the traversing range of the machine axes is not affected.
Figure 7-9
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Working area limitation based on offset linear axis
Kinematic Transformation (M1)
TRANSMIT
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