Programmable Contour Accuracy - Siemens SINUMERIK 840D sl Function Manual

K6: Contour tunnel monitoring

4.3 Programmable contour accuracy

Shutting down
Monitoring can be stopped by enabling the machine data setting:
MD21050 = 0.0.
Analysis output
The values of deviation of the actual value of the tool tip from the programmed path can – for
analysis purposes – be output on a fast analog output (accuracy monitoring).
The assignment of an analog output to output the contour error is programmed in machine
data:
MD21070 $MC_CONTOUR_ASSIGN_FASTOUT
Value
0
1
2
...
8
Scale
The tunnel radius set in MD21050 corresponds to a voltage of 10 V at the output.
4.3 Programmable contour accuracy
Function
The function "Programmable contour accuracy" limits the contour errors caused by control
behavior and jerk filter to a specified value by reducing the path velocity on curved contours
by the necessary amount. It allows the user to set a compromise between accuracy and
productivity of a machining.
Note
The "LookAhead" function ensures that the velocity necessary for maintaining the required
contour accuracy is not exceeded at any point along the path.
Configuration
The mode of operation and parameterization of the function is determined by the machine data:
180
Meaning
No output (default setting)
Output to output 1
Output to output 2
...
Output to output 8
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions