Siemens SINUMERIK 840D sl Programming Manual page 483

Example of on-the-fly parting
An extruded material which passes continuously through the operating area of a cutting tool
must be cut into parts of equal length.
X axis: Axis in which the extruded material moves. WCS
X1 axis: Machine axis of extruded material, MCS
Y axis: Axis in which cutting tool "tracks" the extruded material
It is assumed that the infeed and control of the cutting tool are controlled via the PLC. The
signals at the PLC interface can be evaluated to determine whether the extruded material
and cutting tool are synchronized.
Actions
Activate coupling, LEADON
Deactivate coupling, LEADOF
Set actual values, PRESETON
%_N_SCHERE1_MPF
;$PATH=/_N_WKS_DIR/_N_DEMOFBE_WPD
N100 R3=1500
N200 R2=100000 R13=R2/300
N300 R4=100000
N400 R6=30
N500 R1=1
N600 LEADOF(Y,X)
N700 CTABDEF(Y,X,1,0)
N800 X=30 Y=30
N900 X=R13 Y=R13
N1000 X=2*R13 Y=30
N1100 CTABEND
N1200 PRESETON(X1,0)
N1300 Y=R6 G0
N1400 ID=1 WHENEVER $AA_IW[X]>$R3 DO PESETON(X1,0)
; PRESET after length R3, new start following parting
N1500 RELEASE(Y)
N1800 ID=6 EVERY $AA_IM[X]<10 DO LEADON(Y,X,1)
N1900 ID=10 EVERY $AA_IM[X]>$R3-30 DO EADOF(Y,X)
N2000 WAITP(X)
N2100 ID=7 WHEN $R1==1 DO MOV[X]=1
FA[X]=$R4
N2200 M30
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
Motion synchronous actions
10.4 Actions in synchronized actions
;Length of a part to be cut off
;Start position Y axis
;Start condition for conveyor axis
;Delete any existing coupling
;Table definition
;Value pairs
;End of table definition
;PRESET at beginning
;Start position Y axis, axis is linear
;Couple Y to X via table 1, for X < 10
;> 30 before traversed parting distance,
;deactivate coupling
;Set extruded material axis continuously
;in motion
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