Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

9 Adjustments9.1.1 Servo Gain Adjustment Methods9.1 Autotuning9.1.1 Servo Gain Adjustment MethodsThe SERVOPACK has the servo gains to determine the servo response characteristics. The servo gains are set inthe parameters. The parameters are designated for each function as shown in 9.1.2 List of Servo AdjustmentFunctions.The servo gains are factory-set to stable values, and responsiveness can be increased depending on the actualmachine conditions. The following flowchart shows an overview procedure for adjusting the servo gains toreduce the positioning time for position control. Follow this flowchart to effectively adjust the servo gains. Forfunctions in bold lines in the flowchart, select the adjustment method according to the client’s intent using 9.1.2List of Servo Adjustment Functions.Start adjusting servo gain.Adjust using (1) Autotuning Functions.Results OK.Results OK?Results insufficient.Adjust using (2) Positioning Time Reduction Functions.Results OK.Vibration resultedResults OK?Results insufficient.Adjust using (3) Vibration Reduction Functions.Results OK.Results OK?Results insufficient.End servo gain adjustment.If the desired responsiveness cannot be achieved adjusting according to the servo gain adjustment methods, considerthe following possible causes.• Autotuning does not suit the operating conditions.Adjust the servo gains manually. Refer to 9.3 Manual Tuning.• The selection of settings for the positioning time reduction functions or vibration reduction functions arenot appropriate.Each function may not be effective for all machines due to machine characteristics or operating conditions.Use other positioning time reduction function or vibration reduction function.9-2