Siemens SINUMERIK 840Di Function Manual page 238

Detailed Description
2.14 Path jerk for real-time events (channel-specific)
Functionality
The path-jerk limitation can be activated/deactivated by programming the setting data.
Parameter:
• Value range: TRUE, FALSE
Application:
• Part program
• Static synchronized action
2.14 Path jerk for real-time events (channel-specific)
2.14
2.14.1 Detailed description
2.14.1.1 General information
Key statement
So that no compromise has to be made between machining-optimized jerk on the one hand
and time-optimized jerk in connection with the following real-time events on the other:
• NC-STOP/NC-START
• Feedrate override modifications
• Modification of the velocity default for "safely reduced velocity" within the context of the
the path jerk can be set for the real-time events specified above using a channel-specific
system variable:
$AC_PATHJERK =
Path jerk for real-time events will only be active for the duration of the change in velocity in
respect of one of the real-time events specified above.
Limitation
As the jerk is not a physical variable of any relevance to the drive, no limit is imposed on the
jerk set.
2-26
Value
"Safely Integrated" function
path jerk
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Acceleration (B2)