Evolution of the humble Separator (what you need to know!)

The Evolution separator has been the global market leader now for the last 15 years with in excess 650 units supplied to over 30 countries with 2020 being our best selling year to date.

Originally designed in 2005, within a couple of years this new generation of clod, stone and haulm separator emerged as the best selling machine of its type and quickly revolutionised what we could expect for damage free cleaning of virtually all root crops, fruits and alliums.

The original design had a substantial make over in 2014 receiving a host of modifications with direct drive motors being the highlight. Outwardly its difficult to see the progression in terms of development but the real differences can be found beneath the skin. Scotts pride themselves in having control of all aspects on the manufacturing process with the polyurethane casting being at the heart. In house 3D CAD modelling together with 3D printing and CNC machining allow us to rapid prototype our Spiral roller designs at a whim, within days not weeks. It simply means we can try any amount of wacky ideas and learn something new every time.

The results of this can be found within a much higher performing spiral roller segment, let us explain in detail.

How Does It Work?

The spiral roller working in tandem with the following clod roller or “P roller” has 2 jobs. Extracting haulm/leaf matter and everything else (clod, stones soil) both require different attributes within the spiral segment design.

Lets take haulm for the first example, you need to firmly pinch the stems tightly between the rollers to extract them quickly so a large contact area between the rollers and a stiff rib are the key. The Evolution spiral rollers feature a flat topped rib. The rib itself has a stiff construction and does not easily deflect away as it “pinches” the haulm against the clod roller. This eliminates bunging of root balls. There is no need to have the pair of rollers pressed together (causing premature wear) we can simply just leave a 1mm gap.

Extracting clod, stones, mud etc, We rely on the ribs or “tread pattern” to nibble away at the clods, The design of the rib / shape of the valley allows anything that’s an irregular shape to be grabbed by the ribs and pulled down between the rollers. At this point it is essential that the tread pattern does not completely fill up with soil and become smooth and the roller itself can deform around harder clods and especially stones. We feature large multiple air chambers that solves these two problems and this is where recent development has been focussed.

Self cleaning then is the key and this ONLY happens when two things exist at the same time.

  1. Regular deformation of the roller body
  2. Inertia (we recommend 130RPM in wet conditions)

A Higher Performing Spiral Roller

We do not take the simple approach of aligning the air chamber directly underneath the spiralling outer rib. This dramatically reduces the “pinch effect” and causes bunging, rather, we run our air chambers (and spokes) parallel to the shaft together with strategically placed foam pockets. What this gives us is varying stiffnesses along each alternate rib to increase the “pinch effect” against the haulm, yet allowing the very best deformation. The inclusion of a foam section also protects the ribs from stone damage.