What's the matter with the popping sound when the rotating roast duck box rotates?

The reasons why the rotating roast duck box will pop when it rotates are as follows:

If the mechanical transmission system meshes with gears, as long as one of these gears is broken, it will make a mechanical hooking sound; Because of its fracture, the original gear part is empty, and when other gears bite into this part, it presents a biting state. When the gear suddenly bites from a previous vacancy to the next tooth position, it will make a collision sound; Just like when riding a bicycle, the chain suddenly turns to the next tooth position because it doesn't bite into the current tooth position, and there will be the phenomenon of stepping empty and plopping.

When the mechanical system is driven by the bearing, when the beads in the bearing are broken, the running bearing will make an intermittent clicking sound due to the broken beads. Because the running broken beads will cause friction to the surrounding mechanical parts and make a regular sound. This sound is like a broken bearing on a bicycle. When the beads are damaged and partially compressed, they will slide down mechanically due to the lack of beads, resulting in a thumping sound.