Electronic Grading » Optical Sorting


Functionality - How does electronic grading work and compare to manual inspection?

Inspection is generally done manually by human graders. The objective is usually to remove non-packable product from a run of potatoes prior to finish pack. In some situations a Class 2 grade can be made at the same time. This is more efficient in terms of product handling but requires more decisions to be made at point of inspection. Levels of wastage more than 35% cannot be effectively removed by human operators.

An electronic grading system does not have these limitations, as there is no practical limit on the number of decisions it makes and the high levels of wastage do not limit the machine performance. The only effect that high wastage levels have is the maximum machine transport capacity.

An Autosort does not get tired or mind un-sociable working hours. A typical inspection area with a 15 tonne per hour throughput might work up to 8 manual inspectors to get a premium product for supermarket retail. When an Autosort is introduced this number is reduced to 2 manual inspectors. This not only reduces the amount of labour and its associated costs and management issues but alleviates the mistakes they make while picking.

The need for labour for manual grading becomes more independent from the quality of the crop.

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Optical Inspection
 
Manual Inspection

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