Commissioning - Siemens SINUMERIK 840D sl Function Manual

K3: Compensations
5.4 Interpolatory compensation
Preconditions / activation
The "direction-dependent LEC" is implemented in the SINUMERIK control as a special case
of "sag compensation". This is the reason that the preconditions and conditions of "sag
compensation" apply (see "Sag and angularity error compensation (Page 272)").
The activation of the compensation can be checked using a reference measurement, e.g. using
the laser interferometer or in the simplest case, using the service display of the particular axis.
Note
If the "direction-dependent LEC" is used in parallel to the sag compensation and compensation
of the angularity, then the secondary conditions of these functions must be taken into
consideration together, e.g. the assignment of tables <t> to the particular function.
5.4.5.2

Commissioning

Measuring the error or compensation values
When commissioning the "direction-dependent LEC" - just the same as when commissioning
the "direction-dependent LEC" - direction-dependent error curves for each axis are determined
using a suitable measuring device (e.g. laser interferometer) (see Section "Leadscrew error
and measuring system error compensation (Page 267)"). A part program with measurement
points and wait times should be generated in order to perform the measurement (see Section
"Example (Page 301)"): Program "BI_SSFK_MESS_AX1_X.MPF").
Because the various measuring devices offer different support options for the practical
implementation in conjunction with a SINUMERIK control, this process is only generally
described in the following referred to a control.
Note
The measurement for determining the leadscrew error should only be carried out during the
first commissioning if, in the machine data, the traversing directions of the axes in relation to
the machine coordinate system have been correctly set.
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions