Yaskawa SGDH Linear Sigma Series - Manual (Page 348)

10 Adjustments
10.4.10 Force Reference Filter
10-26
10.4.10 Force Reference Filter
As shown in the following diagram, the force reference filter contains one force reference filter and two notch
filters arrayed in series, and each filter operates independently. The notch filters can be enabled and disabled
using the parameters.
Software version earlier than 32 does not have the parameters for the First Stage Notch Filter Q Value
(Pn40A) and the Second Stage Notch Filter (Pn40B and Pn40C).
(1) Force Reference Filter
If you suspect that machine vibration is being caused by the servodrive, try adjusting the force reference filter
time constant. This may stop the vibration. The lower the value, the better the speed control response, but there is
a lower limit that depends on the machine conditions.
Force reference
after filtering
Force reference
befor filtering
First
stage
notch
filter
Pn409
Pn40A
Force
reference
filter
Pn401
Force related
function switch
Pn408
Second
stage
notch
filter
Pn40B
Pn40C
Notch filter Notch filter 1st-order delay filter
IMPORTANT
Pn401 Force Reference Filter Time Constant
Setting Range Setting Unit Factory Setting Setting Validation
0 to 65,535
(0.00 to 655.35 ms)
0.01 ms 100
(1.00 ms)
Immediately
Speed Position Force