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The importance of proper web tension control

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When a web moves through the entire printing process, it should not get wrinkled or stretched along the way. This will resolve in unusable material, and to avoid this the web must maintain an optimum tension. The processes vary so multiple tension control options are necessary to fit the needs of any application.

 

The optimal web tension control

If your material is undergoing a web fed process, it should run at the lowest tension possible, as long as it is able to track through the machine and can take on all required functions. The goal is to have the web move through the process with a minimum amount of tension, but still able to be printed on. By doing it this way, you avoid inducing energy into the web that can stretch or damage it.

Different tension needs for different functions

As an example, unwinding a web needs a different tension level than the tension level when a web passes through the press. This means that you will need a new tension in every individual area, so you are able to isolate and manage it.

Control the level of tension and avoid problems

One way to control the tension level is by implementing load cells or transducers that can provide a signal to a controller. If the area is not at the set level of tension, the controller will tell whether to increase or decrease the tension.

 

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