Continuous Path Mode, Exact Stop and LookAhead (B1)
3.4 Continuous-path mode
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
65
Activating
Jerk limiting at block transitions becomes active if continuous path mode is programmed with
G64 and SOFT acceleration characteristics. MD32432 PATH_TRANS_JERK_LIM must
contain a positive value.
3.4.4 Machine axis-specific jerk limiting
Function
The axis-specific machine data MD32431 MAX_AX_JERK[..] can be used to set individual
changes in acceleration for each machine axis, like those that can already be set for
acceleration limits in machine data MD32300 MAX_AX_ACCEL.
MD32431 MAX_AX_JERK acts on the axes interpolated by the path if SOFT (smooth
acceleration curve) is active within a block.
A basic distinction is made between the axis acceleration curve within a block and at the
transition between two blocks.
Advantages
The deployment of axis-specific machine data for the path offers the following advantages:
● Immediate allowance is made in the interpolation for the dynamic response of the axes,
which can then be fully utilized for each axis.
● Jerk limitation for separate axes is performed not just in linear blocks, but also in curved
contours.
Please refer to Chapter "Acceleration (B2)" for more information on the subject of "jerk
limiting".
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