B2: Acceleration
4.2 Functions
Basic Functions
240
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
4.2.16
Jerk with programmed rapid traverse (G00) (axis-specific)
4.2.16.1
General Information
Overview
Frequently, the maximum jerk for the machine axes involved in the machining process must be set lower than the
machine's performance capability officially allows because of the supplementary conditions associated with the
specific process concerned.
For time-optimized traversing of the machine axes with programmed rapid traverse (part-program instruction
G00), a specific maximum value can be programmed for the axis-specific jerk.
JOG setup mode
This function does not affect jerk in respect of a rapid traverse override in JOG setup mode.
4.2.16.2
Parameterization
The maximum value for axis-specific jerk with programmed rapid traverse is parameterized (
G00
) using the axis-
specific machine data:
MD32434 $MA_G00_ACCEL_FACTOR
(scaling of the acceleration limitation with G00)
This is used to generate the maximum value for axis-specific jerk with programmed rapid traverse (
G00
) that is
taken into account by the path planning component during preprocessing:
Jerk[axis] =
MD32431 $MA_MAX_AX_JERK * MD32435 $MA_G00_JERK_FACTOR
4.2.17
Excessive jerk for block transitions without constant curvature (axis-specific)
4.2.17.1
General Information
Overview
In the case of block transitions without constant curvature (e.g. straight line > circle), the programmable controller
has to decelerate movement of the geometry axes significantly in order to ensure compliance with the
parameterized axis dynamics. For the purpose of reducing/avoiding deceleration in connection with block
transitions without constant curvature, a higher level of axis-specific jerk can be enabled.
The excessive jerk is parameterized using a dedicated axis-specific maximum value.
