Siemens SINUMERIK 840C - Manual (Page 357)

6 NC Machine Data (NC MD), NC Setting Data (NC SD) 09.95
6.7 Axis-specific MD 2 (axial data 2)
Measuring time 1 (neural QEC only) (as from SW 4) 1372*
Default value Lower input limit Upper input limit Units
600 1 9999 9999 % of MD 1236*
Active on
NC Stop
Measuring time 2 (neural QEC only) (as from SW 4) 1376*
Default value Lower input limit Upper input limit Units
300 1 9999 9999 % of MD 1236*
Active on
NC Stop
Measuring time 3 (neural QEC only) (as from SW 4) 1380*
Default value Lower input limit Upper input limit Units
300 1 9999 9999 % of MD 1236*
Active on
NC Stop
Measuring times MD 1372* - 1380* are used to set the adaptation of the measuring duration to
determine the fault criteria during the neural quadrant error compensation learning phase (MD
1812*, bit 0 and 1).
If this measuring duration is to remain constant, all 3 machine data must be parameterized to
the same value. Reparameterization of the standard value is usually not necessary because a
percentage is entered in MD 1236*.
The middle measuring duration (MD 1376*) is also used for conventional quadrant error
compensation if the service QEC display is used to make the settings.
Special features:
If the value 0 is entered in MD 1236*, 100% = 10 ms, as otherwise it is not possible to
parameterize error measuring times > 0.
Torque compensation controller P component
(as from SW 4.4)
1384*
Default value Lower input limit Upper input limit Units
100 0 1 000 000 0.0001%
Active on
NC Stop
The P gain of the torque compensation controller is parameterized in % of the ratio drive
maximum speed to nominal torque of the slave drive. The input variable of the torque
compensation controller is the difference in torque between master and slave, the output
variable is a speed setpoint. See also MD 1812* and 523*.
Formula:
Output variable = P gain * control difference
Example:
A torque difference of 10 % of the slave nominal torque and standard parameterization 100
(= 0.01%) produces an output variable of the controller of 0.001 % of the maximum speed of
the slave drive (0.01 % * 10 % = 0.001 %).
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SINUMERIK 840C (IA)