Siemens SINUMERIK 840D sl Function Manual page 437

3. Create the NC program that moves the machine axes to the required positions and
4. Activate the learning phase by starting this NC program. The compensation characteristic
5. Activation of the injection of the compensation values for the required axes with machine
6. Parameterize the trace for the circularity test in the menu "Circularity test measurement"
7. Start the NC program with test motion (circle). The actual position values during the
8. Check the quadrant transitions for the contour recorded.
9. Depending on the result, repeat items 2, 4, 7, 8 and 9 if necessary. It might be necessary
10. The compensation characteristics must be saved as soon as the contour precision meets
11. If necessary, the memory area previously reserved for the compensation values can be
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
parameterizes and calls the reference learning cycle QECLRN.SPF (as in the example
program QECSTART.MPF). The feedrate override switch must be set to 100% of the
learning phase so that the parameters can take effect in accordance with the defaults.
is learned simultaneously for all parameterized axes. The learning duration depends on
the specified learning parameters. If default values are used, it can take several minutes.
The status of the axes concerned can be observed in the service display "axis" in the
display "QEC learning active".
data setting:
MD32500 $MA_FRICT_COMP_ENABLE = 1(friction compensation active).
(with HMI Advanced or commissioning tool). Parameter values for reference NC program:
Radius[mm]:
Feedrate[mm/min].
After this, enable the measuring function with the vertical softkey "Start".
circular movement are recorded and stored in the passive file system. After termination of
data recording, the recorded contour is displayed as a diagram.
to change certain QEC system variables first (see also Section "Learning the neural
network").
the requirements (see Section "Learning the neural network").
reduced to the memory actually required.
NOTICE
When the machine data below is altered, the non-volatile user memory is automatically
re-allocated on system power-on.
MD38010 $MA_MM_QEC_MAX_POINTS
(number of values for quadrant-error compensation with neural network)
All the user data in the non-volatile user memory are lost. These data must therefore be
backed up first. After power-on of the control, the backed up characteristics must be
loaded again.
Compensations (K3)
Neural quadrant error compensation
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