The patent-pending VTECTION® Vibration Detection System monitors rotor vibration to reduce damage from contact with ungrindable objects or other causes of damaging vibration like an out-of-balance rotor, broken insert, or defective bearing. When coupled with Morbark's Break-Away Torque Limiter, dual hammermill protection - both mechanical and electrical - is achieved. This system will minimize the potential for damage when a non-grindable material enters the mill. If an un-shreddable object enters the grinding chamber while in grinding protection mode, the VTECTION® system will sense the spike in vibration and instantly stop and reverse the infeed conveyor. By reversing the infeed conveyor, the VTECTION® system lowers the rotor’s chance of repeatedly striking the foreign object.