Mitsubishi Electric MELSERVO MR-J2 C Series, Инструкция по эксплуатации

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9. ADJUSTMENT
9.4.3 Load inertia moment is 20 or more times
(1) Machine condition
The machine inertia moment is 20 times or more and the servo motor oscillates at low frequency (5Hz
or more). At this time, servo motor shaft vibration can be confirmed visually.
This adjustment method is valid for the following machines:
(a) Machine in which a timing belt is driven without reduction gear
Servo motor
Pulley
(b) Machine in which a disc is rotated without reduction gear
Servo motor
Disc
(c) Machine of which ballscrew lead is long
Ballscrew
Servo motor
(2) Adjustment procedure
1) Choose the response level setting of slow response.
Set "0101" in parameter No.3.
2) Set the load inertia moment ratio (parameter No.34).
If an exact machine inertia moment ratio is unknown, enter an approximate value.
When the value is set in this parameter, the following parameters are set automatically. When
there is no machine resonance, the value of each parameter is set to the ideal gain for the load
inertia moment ratio (parameter No.34) value.
Parameter No. Symbol Name
7 PG1 Position loop gain 1
35 PG2 Position loop gain 2
36 VG1 Speed loop gain 1
37 VG2 Speed loop gain 2
38 VIC Speed integral compensation
3) Set "not executed" (parameter No.3: 2 ) by the auto tuning selection.
4) Alternate a start and a stop several times and check whether the machine does not vibrate.
5) If vibration still persists, repeat steps 1) and 4).
6) If vibration still persists, make (a) Adjustment 1 and (b) Adjustment 2 in paragraph (2) of
Section 9.4.2.
7) If you want to further raise the response level, set parameter No. 3 to "auto tuning executed"
(third digit) with operation stopped, and increase the response level setting (first digit). After
that, set that parameter to "auto tuning not executed" (third digit). For example, set parameter
No. 3 to "0102" and then change it to "0202".
8) Reducing the speed loop's integral time constant (parameter No.38) may improve the
performance. However, making it too small may generate vibration.
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