NSK Megatorque PS Series - Setting Notch Filter

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3) Press the － key several times to lower the low-pass filter frequency (FP data) until
the resonant noise vanishes.
:>
:>FP/AJ
STEP 10
FP 990 _
-
+
-
+
…
4) If the motion of the Motor becomes unstable, press the ＋ key several times to
increase the low-pass filter frequency until it becomes stable
:
>
:>
FP/AJ
STEP 10
FP 120 _
Pressing
SHIFT
-
+
-
+
…
5) Press the ENT key to complete the setting.
(An input of BS key resets to the original setting.)
:>
F
P/AJ
STEP 10
FP 120
:>_
ENT
[Reference] When terminates the low-pass filter
:
:
:FP0
:_
ENT
P 0
?
F
5.5.2. Setting Notch Filter
 When setting the notch filters (NP and NS), you need to measure the resonant frequency by
checking the velocity waveform with the monitoring pins on the front panel of the Driver Unit
by means of an oscilloscope, etc.
 Check the resonant frequency as shown in Figure 5-3. If the frequency is 200 Hz, type as shown
below to set the filter frequency.
0
?
P 2
$
N
ENT
0
?
:
:
:NP200
:_
Figure 5-3: Measuring resonance frequency
Screen of oscilloscope
200 Hz (5ms)
Oscilloscope