Siemens SINUMERIK 840D sl Function Manual page 911

Figure 14-4
Example
N01 M3 S500
N02 M2=3 S2=300
N05 G4 F1;
N10 COUPDEF(S2,S1,-1)
N11 COUPON(S2,S1)
N26 M2=3 S2=100
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Schematic representation of process resulting in differential speed
; S1 rotates positively at 500 rpm
; the master spindle is spindle 1
; S2 rotates positively at 300 rpm
; Coupling factor -1:1
; Activate coupling, the speed of following spindle S2
; results from the speed of the main spindle S1 and
; coupling factor
; Programming of difference in speed,
; S2 is the following spindle
S3: Synchronous spindle
14.4 Special features of synchronous mode
911