One of the drive tools available for turret winder applications is tension boost. This function is different than torque boost.
Tension boost is not always required. It may be required if the winder includes a layon roller or rider roller. The layon roller is removed for the turret index and thus the wound in tension is reduced. Boosting the tension can reduce wound roll defects due to the loss of the layon roller.
The timing for tension boost on the outgoing roll is important. The tension should be automatically increased just before (~0.5 second) the layon roll lifts. The boost should remain active the entire time the layon roll is lifted. In fact, so many actions occur during the index, that it may make sense to maintain tension boost until the knife cut is complete. After the knife cut, tension drops to zero on the outgoing roll. Tension control including tension boost should be disabled while the outgoing roll is stopped.
Tension boost may also be required on the incoming roll to provide a tightly wound start at the core. If tension boost is used for the incoming roll, the boost should be ramped off over several seconds rather than simply removed.