13.4 Utility Function (Fn
) Operations on the Panel Operator
13.4.33 Easy FFT (Fn206)
13-33
13
Panel Displays and Panel Operator Pr
ocedur
es
8
(Detection result dis-
play example)
–
If detection is completed normally,
E_FFt
will stop
flashing and the detected resonance frequency will be
displayed. If detection fails,
F----
will be displayed.
To check the results, go to step 9. To monitor the reso-
nance frequency without setting the detection result,
press the
DATA/SHIFT
Key for approximately one sec-
ond and return to step 2.
IMPORTANT
If the operation ended normally but it took two sec-
onds or longer, the detection accuracy may not be suf-
ficient. Increase the reference amplitude to a value
higher than 15 to increase the detection accuracy.
Although increasing the reference amplitude will
increase the detection accuracy, the vibration and
noise in the machine will increase momentarily.
Increase the reference amplitude a little at a time and
observe the results.
9
Press the
MODE/SET
Key. The optimum notch filter
for the detected resonance frequency will automatically
be set. If the notch filter is set correctly,
donE
will flash
on the display, and then the display shown on the left
will appear.
If the 1st notch filter frequency is already set (Pn408 =
n.
1), the 2nd notch filter frequency will be auto-
matically set (Pn40C).
Press the
MODE/SET
Key to return to step 5.
Note: 1. If both the 1st and 2nd notch filter frequencies are
already set (Pn408 = n.
1
1), no more notch filter
frequencies can be set.
2. If the frequency detected by this function is not to be
used, set Pn408 to n.
0 (Disable notch filter).
10
Press the
DATA/SHIFT
Key for approximately one sec-
ond to return the display to
Fn206
.
11
Turn the power supply to the SERVOPACK OFF and ON again after you finish executing Easy FFT.
Continued from previous page.
Step
Panel Display after
Operation
Keys
Operation
MODE/SET
DATA/
MODE/SET
DATA/