Siemens SINUMERIK 840Di Function Manual page 174

Detailed Description
2.3 Continuous-path mode
Constraints
The dynamic response adaptation considers only 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.
Activcation
The dynamic response adaptation is only active during path motions:
• Continuous-path mode (G64, G64x)
• Exact stop (G60)
In addition, the dynamic response adaptation is not active under the following boundary
conditions:
• Programmed rapid traverse (G0)
• Changes in the override value
• Stop requests during motion, e.g NC-STOP, NC-RESET
• Active function: "Velocity-related path acceleration" (DRIVE)
Activation
The dynamic response adaptation is activated by an adaptation factor greater than 1:
MD20465 $MC_ADAPT_PATH_DYNAMIC > 1
Automatic activation of the "Smoothing the path velocity" function
When the dynamic response adaptation is activated in continuous-path mode, the
"Smoothing the path velocity" function is always activated as well. With an assigned
smoothing factor of 0% (default: deactivated), a smoothing factor of 100% is used. With a
smoothing factor other than 0%, the assigned value is used:
MD20460 $MC_LOOKAH_SMOOTH_FACTOR (smoothing factor with Look ahead)
2-26
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.
Continuous-Path Mode, Exact Stop, LookAhead (B1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0