Nonacknowledged Gear Step Change - Siemens SINUMERIK 840D sl Function Manual

S1: Spindles
16.4 Configurable gear adaptation
Changeover
Changeover to a new transmission ratio is performed immediately by means of NewConfig.
From a technological viewpoint, the associated mechanical changeover process takes some
time, since, in mechanical terms, a different intermediate gear with rotating tool is being
installed.
Note
At zero speed, changeover is jerk-free. The user is therefore responsible for taking appropriate
precautions.
Applications in which changeover takes place during motion and which require smoothed or
soft speed transition can be handled using existing setpoint speed filters.
For further explanations regarding control engineering dependencies, see Section "G2:
Velocities, setpoint / actual value systems, closed-loop control (Page 317)".
16.4.6

Nonacknowledged gear step change

Mode change
A gear stage change that has not been acknowledged cannot be interrupted by a change in
operating mode (e.g. switchover to JOG).
The switchover is delayed by the maximum period entered in machine data:
MD10192 $MN_GEAR_CHANGE_WAIT_TIME
.
If the gear stage change is not acknowledged within this time, the NC will output an alarm:
Further events
Events that initiate reorganization will also wait until a gear stage change is completed.
The time entered in machine data:
MD10192 $MN_GEAR_CHANGE_WAIT_TIME
determines how long the control waits before executing the gear stage change.
If this time elapses without the gear stage change being completed, the NC responds with an
alarm.
The following events have an analog response:
● User ASUB
● Mode change
● Delete distance-to-go
● Axis interchange
● Activate PI user data
● Enable PI service machine data
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions