Siemens sinumerik 840D sl Function Manual page 592

Brief description
SW 6 and higher
The speed/torque coupling function (master-slave) is used for mechanically-coupled axes
that are driven by two separate motors. A further application is the compensation of gears
and backlash in the gear tooth flank due to mutual tension in the drives.
Speed/torque coupling (master-slave) is a speed setpoint coupling between a master and a
slave axis, involving a torque compensatory controller for even torque distribution. Each
slave axis has exactly one master axis. Conversely, a master axis can also belong to several
slaves; this is done by configuring several master-slave relationships using the same master
axis. A configured slave axis must not be the master axis in one of the other master-slave
relationships.
Differences compared to previous solution (up to SW 5.x)
• If traversing is programmed for a slave axis that has already been linked, an alarm is
• The setpoint position of the coupled slave axis corresponds to the current actual position.
• On request, the coupling is made or released independent of the channel status the next
• For brake control, the interface signal "Master-slave coupling status active" should be
• If a master axis is simultaneously configured as the slave, an alarm is issued. So
• If a coupling is requested and closed, the control activation signals are derived directly
• If the coupling is closed, the slave axis is speed-controlled; status signal DB3x.DBX61.5
Please see Chapter "Constraints" for more information about the differences.
Special functions: Speed/Torque Coupling, Master-Slave (TE3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
issued.
time the axis stops. This allows the coupling status to be changed even during part
program processing.
used.
cascading is not possible.
from the master axis.
"Position control active" is not set.
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