Scotts Evolution Separator

The primary role is to gently separate clod, stones, haulm, and loose soil from the following range of fruit, vegetables, and alliums (although this list continues to grow):

Potatoes, Salad Potatoes, Sweet Potatoes, Onions, Shallots, Carrots, Parsnips, Celeriac, Chicory, Swedes, Red Beet, Brussels Sprouts, Flower Bulbs, Apples, Bell Peppers.

The Evolution Separator generally works by extracting the debris between 2 contra rotating rollers. The larger roller (spiral roller) has air chambers and is deformable with a spiralling rib. The smaller roller (clod roller) is smooth with a choice of finishes. The clever design of the ‘spiral rib’ entrains the debris down into the valley between the rollers, where, if the debris is soft enough, it is then crushed and ejected down below the separator. Stones will also pass between the rollers as the ‘spiral roller’ readily deforms around the stone, so it does not allow losses of crop at this time. If larger stones enter the valley and there is not enough deformation in the spiral roller, there is a safety mechanism that allows the clod roller to spring away momentarily to allow the stone to pass through.