Siemens SINUMERIK 840D sl Programming Manual page 744

Oscillation
11.2 Oscillation controlled by synchronized actions (OSCILL)
Assign oscillating and infeed axes as well as partial and complete infeed
Infeed in reversal point range
The infeed motion must start within a reversal area before the reversal point is reached.
These synchronized actions inhibit the infeed movement until the oscillating axis is within the
reversal area.
The following instructions are used subject to the above assumptions:
Reversal point range 1:
WHENEVER
$AA_IM[Z]>$SA_OSCILL
_RESERVE_POS1[Z]+ii1
DO $AA_OVR[X] = 0
Reversal point range 2:
WHENEVER
$AA_IM[Z]<$SA_OSCILL
_RESERVE_POS2[Z]+ii2
DO $AA_OVR[X] = 0
Infeed at reversal point
As long as the oscillation axis has not reached the reversal point, the infeed axis does not
move.
The following instructions are obtained under the given assumptions (refer above):
Reversal range 1:
WHENEVER
$AA_IM[Z]<>$SA_OSCIL
L_RESERVE_POS1[Z] DO
$AA_OVR[X] = 0 →
→ $AA_OVR[Z] = 100
Reversal range 2:
For reversal point 2:
WHENEVER
$AA_IM[Z]<>$SA_OSCIL
L_RESERVE_POS2[Z] DO
$AA_OVR[X] = 0 →
→ $AA_OVR[Z] = 100
744
Whenever the actual position of the oscillating axis in the
MCS is greater than the start of reversal range 1, then set the
axial override of the infeed axis to 0%.
Whenever the actual position of the oscillating axis in the
MCS is less than the start of reversal range 2, then set the
axial override of the infeed axis to 0%.
Whenever the actual position of oscillating axis Z in MCS is
greater or less than the position reversal point 1, then set the
axial override of the infeed axis X to 0% and the axial
override of the oscillating axis Z to 100%.
Whenever the actual position of oscillating axis Z in MCS is
greater or less than the position reversal point 2, then set the
axial override of the infeed axis X to 0% and the axial
override of the oscillating axis Z to 100%.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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