What causes governor hunting?

Governor hunting occurs when a governor system, used in engines or turbines to regulate speed, oscillates around a set point rather than stabilizing. This can be caused by improper tuning of the governor's control parameters, such as gain settings, or mechanical issues like excessive friction or backlash. Additionally, changes in load or system dynamics can exacerbate the problem, leading to instability. Effective tuning and maintenance are crucial to prevent governor hunting and ensure stable operation.