Improvement Of Characteristics During Acceleration/Deceleration - Mitsubishi Electric MDS-E Series Instruction Manual

MDS-E/EH Series Instruction Manual
5 Servo Adjustment

5.3.4 Improvement of Characteristics during Acceleration/Deceleration

< SHG control >
Because SHG control has a smoother response during acceleration/deceleration than conventional position
controls, the acceleration/deceleration torque (current FB) has more ideal output characteristics (A constant torque
is output during acceleration/deceleration.) The peak torque is kept low by the same acceleration/deceleration time
constant, enabling the time constant to be shortened.
Refer to item "(3) SHG control" in section "Position Loop Gain" for details on setting SHG control.
Speed command
(r/min)
Current FB
(stall current %)
Speed command
(r/min)
Current FB
(stall current %)
No. Abbrev. Parameter name
SV003 PGN1
Position loop gain 1
(SV049) (PGN1sp)
SV004 PGN2
Position loop gain 2
(SV050) (PGN2sp)
SV057 SHGC
SHG control gain
(SV058) (SHGCsp)
3000
0
-3000
200
0
-200
Acceleration/deceleration characteristics during conventional control
3000
0
- 3000
200
0
-200
Acceleration/deceler ation characteristics during SHG control
Setting ratio
1 21
8/3 56
6 126
277
Setting example Explanation
27 33 39 48
Always set with
a combination
72 88 104 128
of these three
parameters.
162 198 234 288
Time
Time
Time
Time
Setting range
1 to 200
(rad/s)
0 to 999
(rad/s)
0 to 1200
(rad/s)
IB-1501229-F