Siemens SINUMERIK 840D sl Programming Manual page 929

Further information
Configured coupling
For the configured coupling, the LS and FS are defined via machine data. The configured
spindles cannot be changed in the part program. The coupling can be parameterized in the part
program using COUPDEF (on condition that no write protection is valid).
User-defined coupling
COUPDEF can be used to redefine or change a coupling in the part program. If a coupling is
already active, it has to be deleted first with COUPDEL before a new coupling is defined.
A coupling is defined in its entirety by:
COUPDEF(<FS>,<LS>,<TFS>,<TLS>, block change behavior, coupling type)
Following spindle (FS) and leading spindle (LS)
The coupling is uniquely defined using the axis names for the FS and LS. The axis names have
to be programmed with every COUPDEF statement. The other coupling parameters are modal
and only have to be programmed if they change.
Example:
COUPDEF(S2,S1)
Transformation ratio
The transformation ratio is defined as the speed ratio between FS and LS:
Following spindle / leading spindle = numerator/denominator
The numerator must be programmed. The denominator must not be programmed. The default
value 1.0 is then set for the denominator.
Example:
Following spindle S2 and leading spindle S1, transformation ratio = 1/1
COUPDEF(S2, S1, 1.0)
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
n1
Spindle 1:
Lead
spindle
n2
Spindle 2:
Following
spindle
Work preparation
3.16 Axis couplings
929