Influences On Asynchronous Oscillation - Siemens SINUMERIK 840D Function Manual

● The oscillating axis can be an input axis for transformations (e.g. inclined axis, see Function
Manual "Transformations", Section "Kinematics transformation").
● The oscillation axis can act as the master axis for gantry and coupled motion axes.
Further information
G1: Gantry axes (Page 259)
● It is possible to traverse the axis with jerk limitation (SOFT) and/or with knee-shaped
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).
15.2.2

Influences on asynchronous oscillation

Setting data
The setting data required for oscillation can be set with special language commands in the NC
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 185)").
● 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.
Further information
V1: Feedrates (Page 125)
● The velocity overlay / path overlay can be influenced by the handwheel (see following table
and Section "H1: Manual traversing (Page 633)").
● The oscillation axis can be moved with reversal feed.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
P5: Oscillation
15.2 Asynchronous oscillation
581