Providing Feedback from Web Dancer to Manage Web Tension by Analog Inductive Sensors
As a web unwinds and feeds material into the process, the control system should compensate for minor changes in tension. The web tension control system registers these tension changes thru a dancer roll. previously, both a feedback potentiometer or an encoder-type product has been utilized by the purchaser to offer a signal to the machine controller, which adjusts drive speed/braking consequently that Both are subject to wear and tear on delicate bearing surfaces. To avoid this challenge, we need non-contact sensors.
Analog Inductive sensors are perfect for this application. Available in a variety of standard housings, their Condist® oscillator technology guarantees plenty longer working distances than standard ((as much as 40 mm). The sensors’ analog output offers resolution in the µm variety with high-quality temperature balance and repeat accuracy. The continuous, non-digitized output of those sensors is ideally fitted to recording the accurate movement of a constantly ‘dancing’ roll.
The approach using an analog inductive sensor needs no mechanical touch. It is then feasible to interface the sensor output straightly to a controller, with multiple switch points included in a single device. This significantly simplifies set up, whilst the challenges of damage and tear related to mechanical touch are avoided.
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