Filter
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PARAMETERS
Speed control
4.4.6 Notch filter (Pr.862, Pr.863, Pr.871)
The mechanical resonance frequency is suppressed by setting the mechanical resonance frequency in Pr.862 Notch filter
frequency and adjusting Pr.863 Notch filter depth and Pr.871 Notch filter width.
If the mechanical resonance frequency is unknown, lower the notch frequency in order from the highest. The point where
the resonance is smallest is the optimum setting for the notch frequency.
In Pr.863 Notch filter depth, a deeper notch depth has a greater effect in reducing mechanical resonance, but because the
phase delay is larger, vibration may increase. Adjust by starting from the shallowest value.
In Pr.871 Notch filter width, a wider notch width has a greater effect in reducing mechanical resonance, but because the
phase delay is larger, vibration may increase. Adjust by starting from the narrowest value.
The response level of speed control in the resonance frequency band of mechanical systems can be lowered to
avoid mechanical resonance.
Parameter
number
Name Initial value Setting range Description
862 Notch filter frequency
0
0 No notch filter
10 to 625Hz Set the frequency for the center of gain attenuation.
863 Notch filter depth
0 0 to 3 0 (Deep) 3 (Shallow)
871 Notch filter width
0 0 to 3 0 (Narrow) 3 (Wide)
Gain
0dB
Frequency
Pr.862 Notch filter frequency
Pr.871 Notch filter width Pr.863 Notch filter depth