Definition (Coupdef) - Siemens SINUMERIK 840D Function Manual

See also
Definition (COUPDEF) (Page 865)
Switch the coupling (COUPON, COUPONC, COUPOF) on and off (Page 868)
19.2.1

Definition (COUPDEF)

Programmable couplings
The number of couplings can be programmed as often as desired depending on the axes
available. This number results from the number of axes/spindles less one for the master.
Furthermore, one coupling can also be configured via machine data as in earlier SW versions.
Permanently configured coupling
The coupling characteristics and transformation ratio for a permanently configured
synchronous spindle coupling can be altered by the NC part program provided that they are not
write-protected. The machine axes for LS and FS cannot be changed.
Define new couplings
Language command "COUPDEF" can be used to create new synchronous spindle couplings
(user-defined) and to modify the parameters for existing couplings.
When the coupling parameters are fully specified, the following applies:
COUPDEF(FS, LS, T
The synchronous spindle coupling is unambiguously defined with FS and LS
The other coupling parameters must only be programmed when they need to be changed. The
last valid status remains applicable for non-specified parameters.
The individual coupling parameters are explained below:
● FS, LS: Spindle name for following and leading spindles
e.g.: S1, SPI(1), S2, SPI(2)
The valid spindle number must be assigned in the axis-specific MD35000
$MA_SPIND_ASSIGN_TO_MACHAX of a machine axis.
● T
The transformation ratio is specified in the form of numeric values for numerator and
denominator (see Section "Synchronous mode (Page 849)").
The numerator must always be programmed. If no denominator is specified, then its value
is always assumed to be "1.0".
● Block change behavior
This parameter allows you to select when the block change should take place when
synchronous operation is selected:
NOC: Block change is enabled immediately
FINE: Block change in response to "Fine synchronism"
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
numerator
, T : Transformation ratio parameters for numerator and denominator
numerator denominator
, T , block change behavior, coupling type)
denominator
S3: Synchronous spindle
19.2 Programming
865