6. NORMAL GAIN ADJUSTMENT
6 - 15
(c) Parameter adjustment
1) [Pr. PB09 Speed loop gain]
This parameter determines the response level of the speed control loop. Increasing this value
enhances response but a too high value will make the mechanical system liable to vibrate. The
actual response frequency of the speed loop is as indicated in the following expression.
Speed loop response frequency [Hz] =
Speed loop gain
2) [Pr. PB10 Speed integral compensation]
To eliminate stationary deviation against a command, the speed control loop is under proportional
integral control. For the speed integral compensation, set the time constant of this integral
control. Increasing the setting lowers the response level. However, if the load to motor inertia
ratio is large or the mechanical system has any vibratory element, the mechanical system is liable
to vibrate unless the setting is increased to some degree. The guideline is as indicated in the
following expression.
Speed integral compensation setting [ms]
≥
2000 to 3000
Speed loop gain/(1 + Load to motor inertia ratio)
3) [Pr. PB07 Model loop gain]
This parameter determines the response level to a speed command. Increasing the value
improves track ability to a speed command, but a too high value will make overshoot liable to
occur at settling.
Model loop gain guideline
≤
(1 + Load to motor inertia ratio)
Speed loop gain
×
8
1
4
1 to
(2) For position control
(a) Parameter
The following parameters are used for gain adjustment.
Parameter Symbol
Name
PB06
GD2
Load to motor inertia ratio/load to motor mass ratio
PB07
PG1
Model loop gain
PB08
PG2
Position loop gain
PB09
VG2
Speed loop gain
PB10
VIC
Speed integral compensation
Summary of Contents for MR-J4W2
Page 9: ...A 8 MEMO ...
Page 17: ...8 MEMO ...
Page 31: ...1 FUNCTIONS AND CONFIGURATION 1 14 MEMO ...
Page 95: ...4 STARTUP 4 20 MEMO ...
Page 169: ...6 NORMAL GAIN ADJUSTMENT 6 20 MEMO ...
Page 201: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 32 MEMO ...
Page 213: ...8 TROUBLESHOOTING 8 12 MEMO ...
Page 219: ...9 OUTLINE DRAWINGS 9 6 MEMO ...
Page 229: ...10 CHARACTERISTICS 10 10 MEMO ...
Page 295: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 327: ...14 USING A LINEAR SERVO MOTOR 14 32 MEMO ...
Page 371: ...16 FULLY CLOSED LOOP SYSTEM 16 24 MEMO ...
Page 521: ...APPENDIX App 38 ...
Page 537: ...MEMO ...
Page 541: ......