In the wire and cable industry, many processes begin with pay-off and end with take-up wire. In the part of pay-off wire, how to control the uneven tension is the urgent difficulty for many equipment design engineers and products control engineers. In the past electric design, the engineers used to adopt the A/D, D/A module of PLC, using PCB with tension control technique, and gain the pay-off speed by read the potential of potentiometer with tension swing bar. In this method to maintain a constant tension, it usually adopts the signal line from potentiometer with the tension swing bar and analog signal line from the D/A module which control the speed of the variable frequency drive (VFD). More from http://www.vfds.in/vfd-in-wire-cable-industry-353577.html
By VFD Manufacturers based in pune, INDIA.
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