Siemens SINUMERIK 840D Function Manual page 571

Synchronization between following and leading axes
The acceleration characteristics set and the dynamics offsets set change the duration for
synchronization between following and leading axes during acceleration operations as follows:
Dynamic offset
Dynamic reduction
Dynamic increase
Note
The user must restore the technological synchronization between machining and the
synchronism difference.
Acceleration mode
Only BRISKA is available for the following axis, i.e., abrupt axis acceleration. Acceleration
modes SOFTA and DRIVEA are not available for the following axes described.
Furthermore, it is also possible to configure the positions controller as a PI controller.
Application faults
This option can only be used in conjunction with servo trace and with the appropriate technical
knowledge of the control.
Further information
● CNC Commissioning Manual: NC, PLC, drive
● G2: Velocities, setpoint / actual value systems, closed-loop control (Page 31)
POWER ON
During POWER ON the values of VELOLIMA and ACCLIMA are initialized to 100%.
Mode change
The dynamic offsets remain valid only on transition from AUTO → JOG mode.
RESET
The validities of the (VELOLIMA and ACCLIMA) dynamic offsets after RESET depend on the
setting in the channel-specific machine data:
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
CAUTION
14.6 Dynamic response of following axis
Effect
Prolongs the synchronism difference.
The monitoring from leading to following value may exceed the al‐
lowed range for extended periods.
Shortens the synchronism difference.
The monitoring of leading and following values may exceed the
allowed range for short periods.
M3: Coupled axes
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