
TABLE OF CONTENTS B-65270EN/05
c-2
4.1.1 Servo HRV2 Ccontrol ..........................................................................................110
4.2 HIGH-SPEED HRV CURRENT CONTROL............................................... 114
4.2.1 Servo HRV3 Control ............................................................................................114
4.2.2 Servo HRV4 Control ............................................................................................120
4.2.3 High-speed HRV Current Control........................................................................124
4.3 CUTTING/RAPID SWITCHING FUNCTION.............................................. 125
4.4 VIBRATION SUPPRESSION IN THE STOP STATE................................. 131
4.4.1 Velocity Loop High Cycle Management Function ..............................................131
4.4.2 Acceleration Feedback Function ..........................................................................133
4.4.3 Variable Proportional Gain Function in the Stop State ........................................135
4.4.4 N Pulses Suppression Function ............................................................................139
4.5 MACHINE RESONANCE ELIMINATION FUNCTION ...............................141
4.5.1 Torque Command Filter (Middle-Frequency Resonance Elimination Filter) ......141
4.5.2 Resonance Elimination Filter Function (High-Frequency Resonance
Elimination Filter) ................................................................................................143
4.5.3 Disturbance Elimination Filter Function (Low-Frequency Resonance
Elimination Filter) ................................................................................................149
4.5.4 Observer Function ................................................................................................153
4.5.5 Current Loop 1/2 PI Control Function .................................................................157
4.5.6 Vibration Damping Control Function ..................................................................159
4.5.7 Dual Position Feedback Function (Optional function) ........................................161
4.5.8 Machine Speed Feedback Function......................................................................166
4.6 CONTOUR ERROR SUPPRESSION FUNCTION .................................... 169
4.6.1 Feed-forward Function .........................................................................................169
4.6.2 Advanced Preview Feed-forward Function..........................................................173
4.6.3 RISC Feed-forward Function ...............................................................................176
4.6.4 Cutting/Rapid Feed-forward Switching Function ................................................178
4.6.5 Feed-forward Timing Adjustment Function.........................................................180
4.6.6 Backlash Acceleration Function...........................................................................182
4.6.7 Two-stage Backlash Acceleration Function.........................................................188
4.6.8 Static Friction Compensation Function................................................................204
4.6.9 Torsion Preview Control Function .......................................................................206
4.7 OVERSHOOT COMPENSATION FUNCTION .......................................... 216
4.8 HIGH-SPEED POSITIONING FUNCTION ................................................ 223
4.8.1 Position Gain Switching Function........................................................................223
4.8.2 Low-speed Integral Function................................................................................227
4.8.3 Fine Acceleration/Deceleration (FAD) Function .................................................229