Carding fleece on hand cards or on a hand cranked drum carder is hard work. A motor driven drum carder increases productivity many times over. Either method is considered a batch process. The hand cards can be loaded with a limited amount of fleece and the rolag becomes a unit of work. A large number of rolags will be made before beginning to spin yarn.
       Above, fleece is on the infeed tray ready to be pulled onto the drum carder. Upper right, the rotating drum is collecting a batch of carded wool. To the right, a drum loaded to capacity is being stripped of the carded fibers. The sizable batt pictured below illustrates the increase in productivity as compared to the small rolag taken from the hand carders.