The function of a cable tension set is to prevent the lifting cable running off the cable drum when the shaft operation is activated on power operated doors. With normal lift and low headroom-systems, the open door has the panels horizontally. There is no weight in the vertical tracks so the door panel will not move down when shaft is activated. This will result in rolling out the lifting cables without moving the door panel with the risk of cables running of the drums. Below is an overview of the various cable tension set that FlexiForce has in its program.

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