Delta ASD-B2-0121-B User Manual page 118

Chapter 6 Control Modes of Operation
When the value of Proportional Position Loop Gain, KPP is too great, the position loop
responsiveness will be increased and it will result in small phase margin. If this happens,
the rotor of motor will oscillate. At this time, the users have to decrease the value of KPP
until the rotor of motor stop oscillating. When there is an external torque command
interrupted, over low KPP value will let the motor cannot overcome the external strength
and fail to meet the requirement of reasonable position track error demand. Adjust feed
forward gain, PFG (P2-02) to efficiently reduce the dynamic position track error.
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Revision June 2010