maintaining the linear velocity of an oil impregnated web oiler as the oil impregnated web is wound onto a driven take - up roll . when a new oil impregnated web is installed , the take - up roll is initially driven at an angular velocity to yield the predetermined optimum linear velocity of the oil impregnated web . the angular velocity of the take - up roll is decreased according to the algorithm of the invention so as to maintain constant the linear velocity of the oil impregnated web as the oil impregnated web is wound onto the take - up roll .