Siemens SINUMERIK 840D Function Manual page 583

Deactivate oscillation
One of the following options can be set for termination of the oscillation movement when
oscillation mode is deactivated:
● Termination of oscillation movement at the next reversal point
● Termination of oscillation movement at reversal point 1
● Termination of oscillation movement at reversal point 2
Following this termination process, sparking-out strokes are processed and an end position
approached if programmed.
On switchover from asynchronous oscillation to spark-out and during spark-out, the response
at the reversal point regarding exact stop corresponds to the response determined by the stop
time programmed for the appropriate reversal point. A sparking-out stroke is the motion to the
other reversal point and back (see the table below):
Note
Oscillation with motion-synchronous actions and stop times "OST1/OST2"
Once the set stop times have expired, the internal block change is executed during oscillation
(indicated by the new distances-to-go of the axes). The deactivation function is checked when
the block changes. The deactivation function is defined according to the control setting for the
motional sequence "OSCTRL".
This dynamic response can be influenced by the feed override.
An oscillation stroke may then be executed before the sparking-out strokes are started or the
end position approached.
Although it appears as if the deactivation response has changed, this is not in fact the case.
Table 15-2
Function
Deactivation at defined reversal
point
Deactivation with specific num‐
ber of sparking-out strokes
Deactivation with sparking-out
strokes and defined end position
(optional)
Deactivation without sparking-
out strokes, but with defined end
position (optional)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Operational sequence for deactivation of oscillation
Inputs
Number of sparking-out strokes
equals 0,
no end position active
Number of sparking-out strokes
is not equal to 0,
no end position is active
Number of sparking-out strokes
is not equal 0
end position active
Number of sparking-out strokes
is equal 0
end position active
P5: Oscillation
15.2 Asynchronous oscillation
Explanation
The oscillation movement is
stopped at the appropriate rever‐
sal point
After the appropriate reversal
point is reached, the number of
sparking-out strokes specified in
the command are processed.
After the appropriate reversal
point is reached, the number of
sparking-out strokes specified in
the command are processed, fol‐
lowed by approach to specified
end position.
After the appropriate reversal
point is reached, the axis is trav‐
ersed to the specified end posi‐
tion.
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