Influences On Asynchronous Oscillation - Siemens SINUMERIK 840D sl Function Manual

● The oscillation axis can act as the master axis for gantry and coupled motion axes.
References:
Function Manual, Special Functions; Gantry Axes (G1)
● It is possible to traverse the axis with jerk limitation (SOFT) and/or with kneeshaped
acceleration characteristic (as for positioning axes).
● In addition to this, the oscillation movement can be activated in synchronism with the block
via the part program.
● The oscillation movement can likewise be started, influenced and stopped from the PLC/
HMI.
● Interpolatory oscillation is not possible (e.g. oblique oscillation).
12.2.1

Influences on asynchronous oscillation

Setting data
The setting data required for oscillation can be set with special language commands in the
NCK part program, via the HMI and/or the PLC.
Feedrate
The feed velocity for the oscillation axis is selected or programmed as follows:
● The velocity defined for the axis as a positioning axis is used as the feed velocity. This
value can be programmed via FA[axis] and has a modal action. If no velocity is
programmed, then the value stored in machine data POS_AX_VELO is used (see also
Section "P2: Positioning axes (Page 653)").
● When an oscillation movement is in progress, the feed velocity of the oscillation axis can
be altered via setting data. It can be specified via the part program and setting data whether
the changed velocity must take effect immediately or whether it should be activated at the
next reversal point.
● The feedrate can be influenced by the override (axial NC/PLC interface signal and
programmable).
● If Dry Run is active, the dry run velocity setting is applied if it is higher than the currently
programmed velocity.
Activation of the dry run feed entered in SD42100 $SC_DRY_RUN_FEED can be controlled
with SD42101 $SC_DRY_RUN_FEED_MODE.
References:
Function Manual, Basic Functions; Feedrates (V1)
● The velocity overlay / path overlay can be influenced by the handwheel (see following table
and Section "H1: Manual and handwheel travel (Page 147)").
● The oscillation axis can be moved with reversal feed.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
P5: Oscillation
12.2 Asynchronous oscillation
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