Mitsubishi Electric MELDAS MDS-R Series, Specifications And Instruction Manual

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9. Adjustment
9 - 4
9-2 Gain adjustment
9-2-1 Current loop gain
No. Abbrev. Parameter name Explanation Setting range
SV009 IQA
Current loop q axis leading
compensation
SV010 IDA
Current loop d axis leading
compensation
1 to 20480
SV011 IQG Current loop q axis gain
SV012 IDG Current loop d axis gain
Set the gain of current loop.
As this setting is determined by the motor’s electrical
characteristics, the setting is fixed for each type of motor.
Set the standard values for all the parameters depending on each
motor type.
1 to 4096
9-2-2 Speed loop gain
(1) Setting the speed loop gain
The speed loop gain (SV005 (VGN1)) is an important parameter for determining the responsiveness
of the servo control. During servo adjustment, the highest extent that this value can be set to becomes
important. The setting value has a large influence on the machine cutting precision and cycle time.
(a) Refer to the following table and set the standard VGN1 according to the size of the entire
load inertia (motor and machine load inertia).
(b) If the standard speed gain setting value is exceeded, the current command fluctuation will
increase even if the speed feedback fluctuates by one pulse. This can cause the machine to
vibrate easily, so set a lower value to increase the machine stability.
100 200 300 400 500 600
0
100
200
300
400
500
Mot or unit
Load inert ia scale [%]
Standard
VGN1
HF123,142,223,224
HF302,303
A51
A48
HF204
HF354
Load inertia scale
（
%
）
SV037 Setting value
Motor unit
100
200
0
500
400
300
100 200 400 600 300 500
HF54,104, 15
< HF54 - 354 >
Standard
V GN
Mot or unit
HF105
Load inert ia scale
（
%
）
SV 037 Setting value
50
100
0
250
200
150
100 200 400 600 300 500
HF7
< HF75, 105 > The upper
limit value
for A48
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