Siemens SINUMERIK 840D sl Programming Manual page 621

3. Activate coupling with following spindle stationary with COUPON
Programming
N05 SPOS=10 SPOS[2]=20
N15 COUPDEF(S2,S1,1)
N20 COUPON(S2,S1)
N10 G4 F1
4. Activate coupling with following spindle stationary with COUPONC
Note
Positioning or axis mode
If the following spindle is in positioning or axis mode before coupling, then the following
spindle behaves the same for COUPON(FS,LS) and COUPONC(FS,LS).
NOTICE
Leading spindle and axis operation
If, prior to the coupling being defined, the leading spindle is in axis operation, the velocity
limit value from machine data
MD32000 $MA_MAX_AX_VELO (maximum axis velocity) will still apply even after the
coupling is activated.
To avoid this behavior, the axis must be switched to spindle mode (M3 S... or M4 S...)
prior to the coupling being defined.
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
Comment
; Leading spindle = master spindle = spindle 1
; Following spindle = spindle 2
; Following spindle S2 in positioning mode
; Transformation ratio of FS to LS is 1.0 (default)
; On-the-fly coupling to the leading spindle
; Coupling is closed, S2 stops at 20 degrees
Axis couplings
9.5 Synchronous spindle
621