Siemens SINUMERIK 840D sl Commissioning Manual page 336

Drive tuning
10.7 Circularity test
Enter the following parameters to carry out a measurement:
● "Measurement": Selection of the two axes that are intended to be measured and selection
of the measurement system. Parked encoders are not displayed for selection.
● "Parameter": The parameter settings in the "Radius" and "Feed" input fields must
correspond to the values from the part program that controls the circular motion of the axes,
taking account of the feed override switch setting.
● "Representation": Parameters for displaying the graphics
– "Resolution" (scaling) of the diagram axes in [mm/scaled]
– "Display" via the mean radius or programmed radius
Perform measurement
Procedure:
1. In the "Commissioning" operating area select the "Optim./test" softkey → "Circularity test"
softkey.
2. Select the axes that are intended to be measured with the <SELECT> key or with the "Axis
+"/"Axis -" softkeys.
3. Set the parameters for the measurement: "Radius" and "Feed"
The "Measurement time" display field shows the measurement time calculated from the
"Radius" and "Feed" values for recording the actual position values during the circular
movement:
If the measurement time is not sufficient then only parts of the circle are portrayed. The
measurement time can be increased by reducing the feed value. This also applies if the
circularity test is started from the stationary condition.
4. Set the parameters for displaying the graphic:
If the measurement time calculated from this exceeds the time range that can be displayed
(maximum measurement time = position controller cycle frequency * 2048), an appropriate
sample time is calculated for recording (n * position controller cycle frequency), so that a
complete circle can be displayed.
5. To automatically generate a program, with which you traverse the selected axes, press
softkey "Generate circle program". The program is displayed for checking purposes and
must be confirmed. Ensure that the axes can be traversed according to the program and that
the traversing paths are free.
6. To start the measurement, press the "Start" softkey. The softkeys cannot be used while the
measurement is being performed - with the exception of the "Stop" softkey.
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CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA