B2: Acceleration
4.2 Functions
Basic Functions
234 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
• Interval: t
5
- t
6
Constant jerk with -r
max
; linear decrease in braking acceleration; quadratic decrease in velocity reduction until
zero velocity is reached v = 0
4.2.12.2 Maximum jerk value (axis-specific)
Function
The maximum jerk value can be set for each specific machine axis using the following machine data:
MD32431 $MA_MAX_AX_JERK (maximum axis jerk)
The path parameters are calculated by the path planning component during preprocessing so that the
programmed maximum values of the machine axes that are of relevance for the path are not exceeded.
Exceeding of maximum value
It is possible for the maximum value to be exceeded in connection with specific machining situations (see
following Section: System variable ($AC_PATHJERK)).
4.2.12.3 Maximum jerk value (channel-specific)
Function
As well as it being possible to set the maximum jerk value for specific axes, it can also be assigned as a channel-
specific path parameter using the following machine data:
MD20600 $MC_MAX_PATH_JERK (path-related maximum jerk)
To prevent the axis and channel-specific maximum jerk values interfering with one another, the channel-specific
value must be set to a value greater then the maximum axial values.
4.2.12.4 Parameterization
The axis- and channel-specific maximum values are parameterized using the following machine data:
MD32431 $MA_MAX_AX_JERK (maximum axis jerk)
MD20600 $MC_MAX_PATH_JERK (path-related maximum jerk)
4.2.12.5 Programming
Syntax
SOFT
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