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Updated 23rd November
Behind the webs there are four two roller seperation units per side giving an enourmous secondary seperation area. The operator has control over speeds, directions and clod roller gap from the cab and settings are able to be called up during work so for instance there could be one setting for one part of the field and another for a wet hole and another for the headland etc. These set points could include and operator set variable - agitation, all the seperator sets, web speeds, elevator speeds.
The rollers themselves are made of a microcellular polyeurethane which is non adhesive, flexible and resilient. With this sort of structure we can make the central high tensile steel steel shaft larger therefore getting away from a solid square shaft to a hollow box section 70mm square. This is much lighter and much stiffer than other seperator's 40mm solid. Each shaft is capable of holding a ton and a half in the middle without bending, the equivalent shaft in 40mm solid weighs 7kg more and can only take 700 kg
The seperator is belt driven for quiet and reliable operation and the belt drives are arranged so that the pull of the belt in operation is through the pivot point of the clod roller; no matter how hard the seperator is working the breakback setting on the clod roller is the same. The load on the belt will not pull open the clod roller allowing potatoes to fall through. If the clod rollers are running with the crop or against it the effect is the same.