Siemens SINUMERIK 840D sl Programming Manual page 515

Motion-synchronous actions
WHEN... ... DO
WHENEVER ... DO
Example
No infeed must take place at reversal point 1. At reversal point 2, the infeed is to start at a
distance of ii2 before reversal point 2 and the oscillating axis is not to wait at the reversal
point for the end of the partial infeed. Axis Z is the oscillation axis and axis X the infeed axis.
1. Parameters for oscillation
DEF INT ii2
OSP1[Z]=10 OSP2[Z]=60
OST1[Z]=0 OST2[Z]=0
FA[Z]=150 FA[X]=0.5
OSCTRL[Z]=(2+8+16,1)
OSNC[Z]=3
OSE[Z]=70
ii2=2
WAITP(Z)
Job planning
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
11.2 Control oscillation via synchronized actions
when ... , do ...
whenever ... , do ...
Define variable for reversal area 2
Define reversal points 1 and 2
Reversal point 1: exact stop fine
Reversal point 2: exact stop fine
Oscillating axis Z feedrate, infeed axis X feedrate
Deactivate oscillating motion at reversal point 2; after
delete DTG spark-out and approach end position; after
delete DTG approach reversal position
Sparking-out strokes
End position = 70
Set reversal point range
Enable oscillation for Z axis
Oscillation
11-7