traditional servo motor drives overshoot their position and try to correct by overshooting the opposite direction, especially in high gain applications,. this is called null hunt and is especially prevalent in systems that break away or static friction is significantly higher than the running friction. the cure is lowering the gain, which affects accuracy or using Ezi-Servo motion control system! Ezi-Servo utilizes the unique characteristics of stepping motors and locks itself into the desired target position, eliminating null hunt, this feature is especially useful in applications such as nanotech manufacturing, semiconductor fabrication, vision systems and inkjet printing in which system oscillation and vibration could be a problem.