Consider the following points:

Whether the acceleration and deceleration time of the frequency converter is too short;

Whether the position of the coal seam shaping plate is too high, causing the material on the belt to be too heavy;

Whether the mechanical drum is deformed and whether the bearing is jammed;

Whether the belt scraper is flexible;

Because there are many weighing coal feeders on site. If the system is configured, you can determine whether it is an individual phenomenon or a common phenomenon through comparison and then analyze it.