Detailed description
2.3 Continuous -path mode
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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Figure 2-7 Characteristic of the smoothed path velocity
2.3.6 Dynamic response adaptation
Function
Highly dynamic acceleration and deceleration processes during machining can cause
excitation of mechanical vibrations of machine elements and consequently a reduction of the
surface quality of the workpiece. The function: "Dynamic response adaptation" therefore
provides the option of adapting the dynamic response of acceleration and deceleration
processes to the machine conditions by means of the following parameters:
• Adaptation factor of the dynamic path response
Via the adaptation factor of the dynamic path response, temporary changes in the path
velocity are executed with smaller dynamic response limit values. This adaptation factor
can be set for each channel for traversing motions with acceleration without (BRISK) and
with (SOFT) jerk limiting:
– Traversing motions with acceleration without jerk limiting:
MD20465 $MC_ADAPT_PATH_DYNAMIC[ 0 ] (adaptation of the dynamic path
response)
The adaptation factor acts on the acceleration.
– Traversing motions with acceleration with jerk limiting:
MD20465 $MC_ADAPT_PATH_DYNAMIC[ 1 ]
The adaptation factor acts on the jerk.
• Excitation frequency
The dynamic response limiting should only be active during deceleration and acceleration
processes that trigger mechanical vibrations larger than a specific limiting frequency, thus
causing excitation of machine resonances. This excitation frequency, after which the
dynamic response limiting activates, can be axis-specifically specified via the machine
data:
MD32440 $MA_LOOKAH_FREQUENCY (smoothing frequency for LookAhead)
During the processing, the NC cyclically determines, for all the axes in the path, the
minimum value of their excitation frequencies as the limiting frequency for the adaptation
of the dynamic response.
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