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7 AUXILIARY AND APPLIED FUNCTIONS
7.9 Vibration Suppression Command Filter
■
Operation example
• Smoothing filter
The smoothing filter can remove frequencies higher than the set frequency creating smooth acceleration/deceleration
waveforms from all waveforms higher than the set value. The smoothing time constant is 1/frequency[s], and the
acceleration/deceleration times are extended by the smoothing time constant only. Depth setting is invalid in the smoothing
filter.
• FIR filter
The FIR filter removes only the specified frequencies by superimposing the waveforms that delay phases for only half of the
vibration cycle for position control. The filter time constant is "1/(frequency
2)[s]", and the acceleration/deceleration times
are extended by the filter time constant only. Filter depth can be set. When the effect of the filter is too small, make the
depth larger.
• IIR filter
The IIR filter removes only the specified frequencies for position control. Although the delay time changes depending on the
pattern, acceleration/deceleration times are extended 1/frequency[s] to approximately 1/1.5
frequency. For the IIR filter, the
frequency value can also be changed during positioning operation. However, if the frequency value is changed drastically in
a short period of time, a sudden operation can occur, and an alarm or warning can occur. When changing frequency during
operation, while checking operation, gradually change the value by units such as 0.01[Hz].
t
V
Acceleration time
Positioning speed
Time
Smoothing
time constant
Smoothing
time constant
Deceleration time
: Before filter
: After filter
t
V
Acceleration speed
Positioning speed
Time
Filter
time constant
Filter
time constant
Deceleration time
: Before filter
: After filter
t
V
Acceleration time
Positioning speed
Time
Deceleration time
: Before filter
: After filter
Содержание MELSEC iQ-R16MTCPU
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