Improvement Of Characteristics During Acceleration/Deceleration - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

9-3-6 Improvement of characteristics during acceleration/deceleration

(1) SHG control (option function)
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 "9-2-3 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)
Speed loop lead
SV008 VIA
compensation
Acceleration rate
SV015 FFC
feed forward gain
POINT
9. Adjustment
3000
0
-3000
200
0
-200
Acceleration/deceleration characteristics during conventional control
3000
0
-3000
200
0
-200
Acceleration/deceleration characteristics during SHG control
Setting
ratio
1 23
8
62
3
6 140 160 187 225 281
Set 1900 as a standard value during SHG control.
Set 100 as a standard value during SHG control.
SHG control is an optional function. If the option setting is not provided with the
NC, alarm 37 (at power ON), warning E4, or error parameter No. 104 (2304 for
M60S/E60 Series NC) will be output.
Setting example
26 33 38 47
Always set a combination of 3 parameters.
70 86 102 125
9 - 25
Time
Time
Time
Time
Explanation
0 to 1200
1 to 9999
Setting
range
1 to 200
0 to 999
0 to 999