Sigma II User’s Manual Chapter 6: Servo Adjustment6 - 126.2.2 Using Feed-Forward ControlThe time required for positioning can be shortened with feed-forward control bysetting the following parameter.Definition:Feed-forward control makes necessary corrections beforehand to prevent the control systemfrom receiving the effects of external disturbance. By increasing the effective servo gain, feed-for-ward control improves the system’s response.Parameter Pn109 is set to apply feed-forward frequency compensation to positioncontrol inside the servo amplifier. Use it to shorten positioning time. Too high avalue may cause machine vibration. For most applications, set Pn109 to 80% orless.Parameter Signal Setting(%) ApplicationPn109 Feed-forward Setting Range: 0 to 100Default Setting: 0 Position ControlReference pulsePn109DifferentialFeedback pulse
