Dancer roll

Dancer Roll These can be used as a tension-sensing device in film, sheet, and coating (wire, film, etc.) lines. They provide an even controlled rate of material movement. Type roll can have an influence on the roll s performance. As an example, chrome plated steel casting drums would seem to be very durable dancers. If used in the absence of a nip roll, should last many years. However, these rolls are in fact very soft due to the annealing which good rolls receive for stress relieving the steel. 

Adjustable Roil The dancer rolls, canvas drag brakes, various pony brakes, and pneumatically operated brakes are manual adjustment systems. The most expensive would be the regenerative drive systems. The transducer rolls and dancer rolls would be a close second. These systems are usually required in high web speed applications where accurate tension control of expensive and/or sensitive material is paramount. With roll windup systems different roll or reel-change systems are used to keep the lines running at their constant high speeds. 

Dancer roll n. A roller mounted on an axis, which is movable with respect to axes of other rollers in an apparatus, used to control or measure tension of a continuous web or strand as it passes through a series of rollers. Dancer rolls are used as tensionsensing devices in the extrusion coating of wire, and as tension-maintaining devices in film winding. 

A major part of film, sheet, coating, pipe, profile, etc. lines involve windup rolls. They include winders, dancer rolls, lip rolls, spreader rolls, textured rolls, engraved rolls, and cooling rolls. All have the common feature that they are required to be extremely precise in all their operations and measurements. Their surface conditions include commercial grade mirror finishes, precision bearings and journals are used, and, most important, controlled variable rotating speed controls to ensure uniform product tension control. 

Yes. A regional prize. Best rock n roll dancer. Half the other girls were half her age ... 

Figure 13 Material flow on the entry side of a slitter that incorporates both a dancer and pull rolls.

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