Siemens SINUMERIK 840C - Manual (Page 894)

10.94 12 Functional Descriptions
12.16.3 Installation
12.16.3 Installation
The compensation value of the QEC essentially depends on the machine configuration.
The easiest way to install QEC is to carry out a circularity test. With a circularity test,
deviations from the programmed radius when a circle is described can be measured and
displayed graphically, most especially at the quadrant transition points. To obtain an optimum
compensation in the whole working range of the QEC, the compensation dependancy on the
acceleration must also be considered. This is done by measuring this dependancy at various
points in the range between acceleration 0 and set maximum acceleration. The characteristic
obtained from these measurement results must then parameterized axis-specifically in machine
data 1232*, 1236*, 1240*, 1248*, and 1252*
See Section 5, MDD, Section File functions, for a description of how to save NQEC data.
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1) 100 % in the two compensation values from MD 1232* and 1240* correspond to a speed setpoint of 1V in
analog drives and to 10 % of the maximum speed set in the drive system in digital drives.
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SINUMERIK 840C (IA)