Dancer

A device used to control speed and/or tension that uses a movable element around which the wire is passed. The movable element responds to changes in speed of delivery or removal by changing its position to either accumulate more or less wire. Tension is controlled by regulating the resistance to movement of the dancer. The position and/or motion can be used for speed regulation of either the delivery or receiving machinery. When a dancer assembly to control tension is used for a rolling mill, it is usually housed within an independent chamber so that the atmosphere can also be controlled.