Adaptation Of The Dynamic Path Response - Siemens SINUMERIK 828D Function Manual

If, however, the time t - t
2
10% of t - t , the following time characteristic applies:
2 1
Figure 3-8 Characteristic of the smoothed path velocity
3.4.2

Adaptation of the dynamic path response

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 dynamic response of the acceleration and deceleration processes can be adapted to the machine conditions
using the "adaptation of the dynamic path response" function.
Note
The "adaptation of the dynamic path response" function only concerns the resulting path and
not the deceleration and acceleration processes of the individual axes involved in the path.
For this reason, critical deceleration and acceleration processes of the axes with respect to
the excitation of mechanical vibrations can occur due to discontinuous contour profiles or
kinematic transformations, even with a constant path velocity profile.
Activation
The "adaptation of the dynamic path response" function is only effective during path movements:
• Continuous-path mode (G64, G64x)
In continuous-path mode, the optimal effect of the dynamic response adaptation is attained with an active
100% override. Considerable deviations from this value or functions that cause the path axes to decelerate
(e.g. auxiliary function outputs to the PLC) greatly reduce the desired action.
• Exact stop (G60)
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
is less than 200 ms or if the additional program execution time t
1
B1: Continuous­path Mode, Exact Stop, LookAhead
3.4 Dynamic adaptations
- t is no more than
3 2
183