The tak tak sound is it from the servo?Is it all metal gears?

Hi, When setting the rotation Angle in the code, try not to write 0° or 300°, which may lead to gear stuck or wear for a long time. It is recommended to leave a little space before and after, such as between 10° and 290° rotation.

The sound is normal when the servo is running, but if it is the abnormal sound of the gear wire, please pay attention not to let the servo turn to the critical point, otherwise it is easy to cause damage to the gear.