Siemens SINUMERIK 840D sl Programming Manual page 565

The following assumptions are made for all examples of synchronized actions presented
here:
● Reversal point 1 < reversal point 2
● Z = oscillating axis
● X = infeed axis
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 range 1:
WHENEVER
$AA_IM[Z]>$SA_OSCILL_RESERV
E_POS1[Z]+ii1 DO $AA_OVR[X]
= 0
Reversal range 2:
WHENEVER
$AA_IM[Z]<$SA_OSCILL_RESERV
E_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 used subject to the above assumptions:
Reversal range 1:
WHENEVER
$AA_IM[Z]<>$SA_OSCILL_RESER
VE_POS1[Z] DO $AA_OVR[X] =
0 →
→ $AA_OVR[Z] = 100
Reversal range 2:
For reversal point 2:
WHENEVER
$AA_IM[Z]<>$SA_OSCILL_RESER
VE_POS2[Z] DO $AA_OVR[X] =
0 →
→ $AA_OVR[Z] = 100
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
Note
For more details, see the "Motion-synchronous actions" section.
13.2 Oscillation controlled by synchronized actions (OSCILL)
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%.
Oscillation
565