Siemens SINUMERIK 840D sl Function Manual page 626

TE3: Speed/torque coupling, master-slave
16.8 Supplementary conditions
Gear stage change with activated 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 set specification, the following machine
data must be set:
MD35590 $MA_PARAMSET_CHANGE_ENABLE = 2
Note
For more information about gear stage change and parameter sets for changes in spindle
mode, see:
References:
Function Manual, Basic Functions; Spindles (S1)
Axis container
If a coupled slave axis is configured as a container axis, alarm "4025 Switch axis container
%3 not permitted: Master-slave active channel %1 Axis %2" is displayed for an axis container
rotation.
Axis containers with changing master can be used to make the relevant spindle the master
spindle following a rotation of the axis container. Both master and slave spindles can be
container spindles.
For a coupling to be closed after axis container rotation using a different spindle in each case,
the old coupling must be separated before the rotation, the configuration deleted and the new
coupling configured and closed after the rotation.
Example of a cyclic coupling sequence (position = 3 / container = CT1)
Program code
MASLDEF(AUX,SPI(3))
MASLON(AUX)
M3=3 S3=4000
MASLDEL(AUX)
AXCTSWE(CT1)
626
Comment
; S3 master for AUX
; Coupling in for AUX
; Machining ...
; Delete configuration and release coupling
; Axis container rotation
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions