2 Machine information
08/2008
2.3 Test series on the machine
© Siemens AG 2008 All Rights Reserved
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ePS Network Services, Function Manual (FH) - Release 08/2008
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Notice
Please observe the information on the operator panel!
2.3.2 Requirements for performing the test
Requirements on the control
When making measurements, the machine axes must be moved with precisely the
motion profile that is defined in the NC program. In addition, it must also be guaran-
teed that the motion is also executed in the machine coordinates.
The following functions in the NCK could be problematical when carrying out
measurements (sample selection):
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Asynchronous
subprograms
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Static synchronized actions
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Coupled
axes
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Kinematic
transformations
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Superimposed (overlaid) motion, such as DRF, external work offset
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Tool
length
compensation
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Functions, that influence the velocity, such as G95
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Functions that change the position, such as DIAMON
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Axis replacement/geometry axis replacement
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Axis is passed over to the PLC (PLC axis)
The NC program for performing the measurement does not affect the functions
listed above. Only the zero offsets are disabled and the offset produced by DRF
and external zero point offset is compensated statically, i.e. the value is corrected
by the value that applies at the beginning of the measurement.
Orientation transformations are a special case. It is possible to execute measure-
ments with the geometry axes when transformation is active. However, the offset of
the geometry axis coordinates produced by the orientation axes is not compen-
sated for. It is therefore advisable to deactivate transformation.
Couplings between axes should be separated before the measurement movement
(e.g. in the prolog program). The NC program of the ePS system does not separate
couplings. The ePS system assumes that it is possible to load, select, and start an
NC program (with subroutines) downloaded from the ePS system on the machine
in a particular channel. For machines where the PLC prevents the machine opera-
tor from selecting or starting any NC program, the PLC can communicate with the
ePS system via DB10.DBB90 or DBB91.