
CONTENTS B-65150E/04
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4.5 MACHINE-RESONANCE SUPPRESSION FUNCTION.......................................................................112
4.5.1 Machine Speed Feedback Function............................................................................................................ 112
4.5.2 Observer Function...................................................................................................................................... 116
4.5.3 Torque Command Filter ............................................................................................................................. 120
4.5.4 Dual Position Feedback Function............................................................................................................... 122
4.5.5 Vibration-damping Control Function......................................................................................................... 130
4.5.6 Vibration Suppression Filter Function ....................................................................................................... 133
4.5.7 Current Loop 1/2PI Function ..................................................................................................................... 134
4.6 SHAPE-ERROR SUPPRESSION FUNCTION.....................................................................................137
4.6.1 Feed-forward Function............................................................................................................................... 137
4.6.2 Advanced Preview Feed-forward Function ................................................................................................ 141
4.6.3 RISC Feed-forward Function ..................................................................................................................... 144
4.6.4 Backlash Acceleration Function................................................................................................................. 146
4.6.5 Two-stage Backlash Acceleration Function ............................................................................................... 149
4.6.6 Static Friction Compensation Function...................................................................................................... 160
4.7 OVERSHOOT COMPENSATION ........................................................................................................162
4.8 HIGH-SPEED POSITIONING FUNCTION...........................................................................................171
4.8.1 Position Gain Switch Function................................................................................................................... 171
4.8.2 Low-speed Integration Function................................................................................................................. 175
4.8.3 Fine Acceleration/Deceleration (FAD) Function........................................................................................ 177
4.9 DUMMY SERIAL FEEDBACK FUNCTIONS........................................................................................188
4.9.1 Dummy Serial Feedback Functions............................................................................................................ 188
4.9.2 How to Use the Dummy Feedback Functions for a Multiaxis Servo Amplifiers
When an Axis Is Not in Use....................................................................................................................... 191
4.10 BRAKE CONTROL FUNCTION...........................................................................................................192
4.11 STOP DISTANCE REDUCTION FUNCTION.......................................................................................197
4.11.1 Emergency Stop Distance Reduction Function Type 1 .............................................................................. 197
4.11.2 Emergency Stop Distance Reduction Function Type 2 .............................................................................. 200
4.11.3 Separate Detector Hardware Disconnection Stop Distance Reduction Function........................................ 201
4.11.4 OVL and OVC Alarm Stop Distance Reduction Function......................................................................... 204
4.11.5 Overall Use of the Stop Distance Reduction Functions.............................................................................. 204
4.12 ABNORMAL-LOAD DETECTION FUNCTION .....................................................................................205
4.12.1 Abnormal-load Detection Function............................................................................................................ 205
4.12.2 Unexpected Disturbance Detection Performed Separately for Cutting and Rapid Traverse....................... 214
4.13 FUNCTION FOR OBTAINING CURRENT OFFSETS AT EMERGENCY STOP..................................216
4.14 LINEAR MOTOR PARAMETER SETTING ..........................................................................................217
4.14.1 Procedure for Setting the Initial Parameters of Linear Motors................................................................... 217
4.14.2 Linear Motor Thrust Ripple Correction...................................................................................................... 225
4.15 TORQUE CONTROL FUNCTION........................................................................................................232
4.16 USAGE OF THE SERVO SOFTWARE FOR SUPER-PRECISION MACHINING................................235
4.17 TANDEM CONTROL FUNCTION ........................................................................................................242
4.17.1 Preload Function ........................................................................................................................................ 248
4.17.2 Damping Compensation Function.............................................................................................................. 251
4.17.3 Velocity Feedback Averaging Function ..................................................................................................... 254