Siemens SINUMERIK 840D sl Commissioning Manual page 197

Measurement
The measurement sequence is divided into the following steps:
1. Setting the traverse range monitoring and the enable logic
2. Selecting the measuring type and measured variable
3. Setting the parameters, softkey "Measuring parameters"
4. Displaying the measurement results, softkey "Display"
The following figure shows an optimized position control loop in which the K
adapted via the machine data MD32200 POSCTRL_GAIN.
Figure 11-6
Reference frequency response measurement
The reference frequency response measurement determines the transmission ratio of the
position controller in the frequency range (active position measuring system).
The setpoint filters, control loop gain (K
parameterized such that resonance is avoided wherever possible over the entire frequency
range.
Measuring parameters
● Amplitude
● Bandwidth
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Optimized position control loop
This parameter determines the magnitude of the test signal amplitude. It should be set to
the smallest possible value (e.g. 0.01 mm).
The bandwidth parameter is used to set the analyzed frequency range. The larger this
value, the finer the frequency resolution and the longer the measurement time. The
maximum value is specified by the position controller cycle (T
Bandwidth [Hz] = 1 / (2 * T
max
Example:
Position controller cycle: 2 ms
11.2 Frequency response measurements
factor) and feedforward control must be
v
[sec])
position controller
Optimize the drive.
factor has been
v
):
position controller
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