6  Adjustments
6.3.2  One-parameter Tuning Procedure
6-20
8
If readjustment is required, select the digit with the 
 or   Key or change the FF LEVEL and FB 
LEVEL with the   or   Key. Check the 
response.
If readjustment is not required, go to step 9.
Note: The higher the FF LEVEL, the positioning time 
will be shorter and the response will be better. 
If the level is too high, however, overshooting 
or vibration may occur. Overshooting will be 
reduced if the FB LEVEL is increased.
If Vibration Occurs
• If vibration occurs, press the   Key. The multi-
winding drive unit will automatically detect the 
vibration frequencies and make notch filter or an 
anti-resonance control settings. When the notch fil-
ter is set, “NF1” and “NF2” are displayed on the 
bottom row. When the anti-resonance control is set, 
“ARES” will be displayed on the bottom low.
If Vibration Is Large
• Even if the   Key is not pressed, the multi-wind-
ing drive unit will automatically detect the vibra-
tion frequencies and make notch filter or anti-
resonance control settings.
Notes:
• If the FF LEVEL is changed when the servomotor 
is in operation, it will not be reflected immediately. 
The changes will be effective after the servomotor 
comes to a stop with no reference input and then 
the servomotor starts operation If the FF LEVEL is 
changed too much during operation, vibration may 
occur because the responsiveness is changed rap-
idly when the settings become effective.
• The message “FF LEVEL” flashes until the 
machine reaches the effective FF LEVEL. If the 
servomotor does not stop within approximately 10 
seconds after changing the setting, a timeout will 
occur. The setting will be returned to the previous 
value.
9
Press the   Key to display the confirmation screen 
after level adjustment.
10
• Press the   Key to save the adjusted values. 
After the data is saved, “DONE” will flash for 
approximately two seconds and then “RUN” will 
be displayed.
• To return to the previous value, press the   Key.
• Press the   Key to readjust the level without 
saving the values.
11
Press the   Key to complete the one-parameter 
tuning operation. The screen in step 1 will appear 
again.
Note: The status display will always be RUN when the servomotor power is ON.
(cont’d)
Step Display after Operation Keys Operation
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