7.11 Manual Offset-Signal Adjustment of the Motor Current
Detection (Fn00F)
Use this function only if the torque ripple is still high after the automatic offset adjustment of the motor cur-
rent detection signal (Fn00E).
Follow the steps below.
If this function is executed carelessly, it may worsen the characteristics.
Observe the following precautions when performing manual servo tuning.
• Run the servomotor at a speed of approximately 100 min
-1
.
• Adjust the offset until the torque reference monitor ripple is minimized, monitoring the
torque reference by using the analog monitor.
• Adjust the phase-U and phase-V offsets alternately several times until these offsets
are well balanced.
Step
Display after
Operation
Keys Operation
1
Press the MODE/SET Key to select the utility function
mode.
2 Press the UP or DOWN Key to select Fn00F.
3
Press the DATA/SHIFT Key for approximately one second.
The display shown on the left (phase U) appears.
Note: When "no-oP" blinks for approximately one second,
the write prohibited setting is set in Fn010. Change
the setting in Fn010, and press the key again after
enabling writing. (Refer to 7.12.)
4
Press the DATA/SHIFT Key to display the phase-U offset
amount.
5
Press the UP or DOWN Key to adjust the offset. Carefully
adjust the offset while monitoring the torque reference mon-
itor signal.
Adjustable range: −512 to
+511
6
Press the DATA/SHIFT Key.
The display shown on the left appears.
7
Press the MODE/SET Key.
The display shown on the left appears (phase V).
8
Press the DATA/SHIFT Key to display the phase-V offset
amount.
9
Press the UP or DOWN Key to adjust the offset. Carefully
adjust the offset while monitoring the torque reference mon-
itor signal.
Adjustable range: −512 to
+511
10
Press the DATA/SHIFT Key.
The display shown on the left appears.
11
When the offset adjustment completes, press the DATA/
SHIFT Key for approximately one second.
"Fn00F" is displayed again.
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