What is a tension controller?
　In the industrial sector, in some ribbon and linear products, often need to control the tension to achieve production requirements, tension controller is a kind of instrument to control such tension. Tension controller also has the so-called manual control function, generally refers to the man-made tension controller can be given a certain amount of output to the implementing agency (often the amount of motor current); general tension controller with volume diameter calculation function , Generally used in coiling equipment, there are volume and winding of the points; in addition to taper adjustment function, the controller can be set directly on the internal requirements of some coiling taper.

　Tension controller of the basic structure
　A typical tension control system is composed of a tension controller, a tension reader, a tension detector, a magnetic powder brake and a clutch. According to the loop can be divided into open-loop, closed-loop or free ring tension control system; according to the different membrane monitoring methods can be divided into ultrasonic, floating roller, track arm and so on.
　The stability of tension control is directly related to the quality of slitting products. If the tension is insufficient, the raw material in the operation of drift, there will be sub-cut and rewinder finished paper wrinkling phenomenon; if the tension is too large, raw materials and easy to pull off, so that after the cut-off rewinding finished paper increased.