Example Concept: In a PID controller, oscillations often occur when the proportional gain (Kp) is too high, causing the system to overshoot and oscillate around the setpoint. Additionally, if the integral gain (Ki) is too high, it can lead to accumulated error correction that overshoots the setpoint, while an excessively high derivative gain (Kd) can amplify noise, leading to instability. Proper tuning involves balancing these gains to achieve a stable response without oscillation.