Gear Step Change With Oscillation Mode - Siemens SINUMERIK 840D Function Manual

S1: Spindles
18.4 Configurable gear adaptations
● Switch over skip block, switch over Dry Run
● Editing in the modes
● Compensation block alarms
● Overstore
● Rapid retraction with G33, G34, G35
● Subprogram level abort, subprogram abort
Response after POWER ON
The active gear stage on the machine can be specified by the PLC after POWER ON and in the
RESET state of the NC.
The NC will then select the appropriate parameter set
and check back the NC/PLC interface signals:
DB31, ... DBX82.0-82.2 (set gear stage A to C)
to the PLC.
18.4.7

Gear step change with oscillation mode

The spindle is in the oscillation mode if a new gear stage was defined using M40 (automatic
gear stage selection) - or M41 to M45.
When oscillating, the direction of rotation of the spindle motor is continually reversed in short
intervals. The oscillating motion of the motor helps to engage a new gear stage, for example.
In principle, a new gear stage can also be engaged without oscillation.
The following oscillation types are possible:
● Oscillation controlled by the NC
● Oscillation controlled by the PLC
● Oscillation with FC 18
Further information
Function Manual PLC
Commissioning: Machine data
● MD35010 $MA_GEAR_STEP_CHANGE_ENABLE (assign parameters to the gear step
change).
● MD35410 $MA_SPIND_OSCILL_ACCEL (acceleration when oscillating)
● MD35430 $MA_SPIND_OSCILL_START_DIR (start direction when oscillating)
● MD35400 $MA_SPIND_OSCILL_DES_VELO (oscillation speed)
● MD35450 $MA_SPIND_OSCILL_TIME_CCW (oscillation time for the M4 direction)
● MD35440 $MA_SPIND_OSCILL_TIME_CW (oscillation time for the M3 direction)
794
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA