Siemens SINUMERIK 840C Installation Instructions Manual page 356

09.95
1344*
With MD 1344*, the input variables of the torque compensation controller are weighted to
permit a parameterizable torque distribution over both drives according to the respective
moments of inertia.
The standard parameterization of 500 _ produces a distribution according to the values in
drive machine data 1725 (normalization torque setpoint interface) for both axes. If a different
distribution is to be used, MD 1344* must be calculated according to the following formula:
MD 1344* =
M
desired
1364*
MD 1236* defines the recovery time for the compensation setpoint pulse when operation is
without its adaptation. MD 1236* applies to neural and conventional quadrant error
compensation. If the adaptation of the recovery time constant (neural QEC only) is selected
(MD 1812*, bit 2 = 1), MD 1236* defines the filter time constant in the middle of the working
range, MD 1364* defines the value for acceleration 0.
1368*
The learning rate for neural quadrant error compensation defines how quickly the neural
network learns the optimum characteristic during the neural quadrant error compensation (MD
1812*, bit 0 and 1 set) active learning phase. A high learning rate means a short learning
phase, which in the worst situation can cause instability. A low learning rate is recommended
for learning processes during normal operation as otherwise the characteristic will be changed
if even the smallest disturbance occurs when the speed goes through zero. Reproducibility is
then no longer possible.
©
Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
More user manuals on
Torque distribution torque compensation controller
Default value Lower input limit
500
M
––––––––––––––––––––––––––––––––––––––––––
M + M
desired desired
slave
is the desired torque distribution between master and slave.
2nd compensation time constant (as from SW 4)
150
Learning rate (as from SW 4)
Default value Lower input limit
100
ManualsBase.com
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
(SW 4.4 and higher)
Upper input limit
0 984
desired
slave
MD 1725
slave
* –––––––––––––
MD 1725
master
master
0 9999 9999
Upper input limit
1 500
6FC5197- AA50
6.7 Axis-specific MD 2 (axial data 2)
Active on
NC Stop
Units
‰
· 1000 ‰.
Active on
NC Stop
0.1 ms
Active on
NC Stop
Units
%
6–171