8 Adjustment of Internal Settings
44
Version: 2.0.0
PZ166E
E-625 Piezo Servo Controller
Tools and Accessories
Oscilloscope; recommended: Digital storage oscilloscope (p. 18)
Function generator for the output of square and sine wave functions in the range of
1 Hz to 1 kHz
2 SMB/BNC adapter cables (included in the scope of delivery)
Trimmer adjustment tool
Adjusting the Notch Filter in Analog Mode
1.
Select analog mode and open-loop operation (servo mode OFF) using the
Settings
DIP
switch block:
−
1: ON (down)
−
2: OFF (up)
−
3: OFF (up)
−
4: OFF (up)
2.
Connect the function generator to the
ANALOG IN/WTT
SMB socket using an adapter
cable.
3.
Connect the oscilloscope to the
SENSOR MONITOR
SMB socket using an adapter cable.
4.
Connect the power cord on the wide input range power supply to the power socket.
The E-625 is ready for operation when the green
Power
LED comes on.
5.
If you do not know the resonant frequency for the positioner, determine it as follows:
a)
Set the notch filter frequency range as high as possible using the DIP switch block
on the E-802.55 servo controller submodule (all DIP switches to OFF).
b)
Generate a 1-V square wave signal (peak-peak) with 2 to 5 Hz using the function
generator.
c)
Read the resonant frequency and its level on the oscilloscope (Y-t or FFT display).
6.
Adapt the notch filter frequency range to the resonant frequency of the positioner by
using the DIP switch block on the E-802.55 servo controller submodule.
7.
Adjust the notch filter damping. To do this, turn the S1 switch on the E-802.55 servo
controller submodule using the trimmer adjustment tool.
Possible damping settings of the notch filter: –20 dB or –25 dB
−
If the resonant frequency level is between 15 and 20 dB:
Set damping to –25 dB.
−
If the resonant frequency level is <15 dB:
Set damping to –20 dB.
8.
Generate a 1-V square wave signal (peak-peak) with 2 to 5 Hz using the function
generator.
9.
Read the resonant frequency on the oscilloscope (Y-t or FFT display).
