Please check if the servo is powered off (looses), if so, please restart the robot.If the problem remains, the servo is damaged. Please contact the Library immediately.
If the servo works, the servo may need calibration. Install Yanshee APP on your mobile phone and click the Yanshee APP sidebar –> “Servo” to enter the servo calibration interface. Before the calibration, please observe the deviation of the servos under the normal standing state of the robot, and slowly adjust the servo angle.