NSK EDD Megatorque Motor - Setting Filters (Tuning Level 2); Setting Low-Pass Filter

5. Tuning
— 5-15 —
5.5. Setting Filters (Tuning Level 2)
 Setting the Low-pass filters (parameters FP and FS) will decrease resonant noise level. The parameters
FP and FS describe the cut-off frequency of low-pass filters in [Hz].
 Firstly, set the parameter FP to FP200 if the System vibrates and/or generates resonant noise
after the servo loop gains were properly set.
 If the parameters FP and FS are set too low, the servomechanism may become unstable, thus
resulting in the Motor hunting or adverse effect on positioning.
 Operate the Motor by the demonstration program (SP/AJ) for setting the low-pass filters. Follow the
procedures 1) to 8) described in “5.2.4 Trial Running.”
5.5.1. Setting Low-pass Filter
 Firstly start minor adjustment of the parameter FP (Primary low-pass filter).
1) Input as Parameter code + /AJ.
The screen changes as shown below, and you can change the FP value by the input of the keys
＋ and － .
:>
:>FP/AJ
STEP 10
FP 0 _
P
/
F
J
ENT
A
Current setting
Increment/decrement of the FP value for an input of ＋ or － key
！
Caution : • An input of the keys SHIFT + .
=
will alter the increment or the
decrement of an input of the (+) and (–) keys to 10 times of the current
setting.
 Be careful with the motor vibration because this will make sudden change of the
FP value.
An input of the .
=
key will alter the increment or the decrement of an
input of the (+) and (–) keys to 1/10 of the current setting.
2) Input the ＋ key. The cut-off frequency will be temporally set to 1 kHz.
:>
:>FP/AJ
STEP 10
FP 1000 _
Pressing
SHIFT
-
+
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 _
-
+
-
+
…