Programming - Siemens SINUMERIK 840D Function Manual

B2: Acceleration and jerk
12.2 Functions

Programming

For the purpose of setting the jerk for real-time events in accordance with the acceleration, the
system variables can be set as follows:
$AC_PATHJERK = $AC_PATHACC/smoothing time
● $AC_PATHACC: Path acceleration [m/s
Smoothing time: Freely selectable, e.g. 0.02 s
For information about programming system variables in the part program or synchronized
actions, see Section "Programming (Page 370)".
12.2.14.2 Programming
Syntax
$AC_PATHJERK =
Functionality
The path jerk for real-time events is set via the channel-specific system variables.
Jerk value :
● Value range: Path jerk ≥ 0
● Unit: m/s
Application:
● Part program
● Static synchronized action
Reset behavior
The function is deactivated on reset.
Boundary conditions
Programming $AC_PATHJERK in the part program automatically triggers a preprocessing
stop with REORG (STOPRE).
370
path jerk
3
]
2
Function Manual, 06/2019, A5E47437747B AA
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