Press the N button in the app, and the DEC axis will rotate back and forth
The north button refers to the movement of declination towards the north pole direction, and when powered on, the equatorial zero position is at the north pole. Therefore, when the N (north) button is pressed, the declination axis will move in one direction away from the north pole. When the N button is released and pressed again, the declination axis begins to move towards the north pole.
So when declination is to the left of the North Pole, declination will move to the right, and when declination is to the right of the North Pole, declination will move to the left, always moving towards the direction of the North Pole.
That's why when the power is first turned on, pressing the button N (north) multiple times will cause the declination to oscillate back and forth.
