A web guide controller is a vital component of a web guide system utilized in industrial settings to regulate the lateral position of continuous materials, commonly referred to as webs, during manufacturing processes. Its primary function is to ensure that the material remains aligned and centered as it progresses through various production stages.

The controller receives input from web guide sensors that detect the position of the web in relation to a predetermined path or reference point. Using this information, the web guide controller makes instantaneous adjustments to guiding mechanisms, such as rollers or guides, through actuators like motors or pneumatic systems.