Winch Always On

Available in All versions up to v19
Available in All
Updated in v19

Winch Always On ("auto" in previous program versions) is a type of takeup that actively moves the takeup pulley to maintain the desired belt tension.

This automatic take-up method has the take-up pulley mounted on a horizontal trolley attached to a wire rope guided by a series of sheaves to an electrically (or hydraulically) powered winch. The tension in the belt is generated by an electric motor. The term "Always On" means the motor is always working to maintain a constant belt tension and is capable of producing full torque at zero speed indefinitely.

TU-Drawing-WinchAlwaysOn

Pros

This option requires the smallest footprint and requires little vertical space. Can take advantage of mechanical sheaves to increase tension or increase travel therefore can be used on any conveyor length. Forces can be easily programmed for different control algorithms or easily changed making the system design very flexible.

Cons

A fail-safe brake must be employed for power loss conditions. Any mechanical device will be much slower than gravity. Therefore it is usually impossible to maintain constant tension during transient conditions (I.e. starting/stopping). When the brake sets, belt tensions will be much higher than running conditions require. Therefore advanced system design tools including flexible body transient analysis (dynamic analysis) is highly recommended when this option is chosen.