Speed/torque coupling, master-slave (TE3)
23.10 Response in conjunction with other functions
Turning, Milling, Nibbling
402 Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Gantry
If one master-slave relationship is defined on each side of the gantry grouping to increase
the gain, only the leading axis or following axis may be operated as a master axis.
Moving to fixed end stop
The travel to fixed stop function can be programmed only in the master axis when a coupling
is active and has a different effect on the master and slave axes.
● The programmed value is expressed as a percentage of the reference driving torque of
the master axis. The master axis detects when the fixed stop has been reached.
● The programmed value is also active on the slave axis, but refers to the reference driving
torque of the slave axis.
If the reference torque values of the master and slave axes are different, they can be brought
into line using the following slave axis machine data:
MD37014 FIXED_STOP_TORQUE_FACTOR
Specifying a factor < 1 reduces the programmed clamping torque in the slave axis.
Please note the following constraints:
● Torque distribution between the master and slave axes is not possible during clamping as
the torque compensatory controller is deactivated during clamping operations.
● Status changes to the master-slave coupling have no effect during travel to fixed stop.
Specification of a new status is only accepted when the fixed stop function has been
completed.
Weight counterbalance
The additional torque for the electronic counterweight (MD32460) is computed in the slave
axis, irrespective of the coupling status.
Gear stage change with active master-slave coupling
An automatic gear stage change in a coupled slave spindle is not possible and can only be
implemented indirectly using the master spindle. The point in time at which the gear stage is
changed is then derived from the master spindle. The oscillating motion of the coupled slave
spindle is generated implicitly via the oscillating motion of the master spindle.
in contrast to the master spindle, the associated parameter block must be explicitly selected
in the coupled slave spindle. To enable the parameter block to be specified, the following
machine data must be set to the value 2:
MD35590 PARAMSET_CHANGE_ENABLE (parameter set change possible)
In the event of a gear stage change for the master/slave spindle, the associated parameter
set index can be activated by the PLC via the VDI interface.
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