Crop sorting machines

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Match the sorter to the product and separation criterion: size, density, colour or defect. Check feeding, calibration, throughput and the complete line.

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How to choose a sorting machine

Define the characteristic used to separate the product first. Screen graders, gravity separators and optical sorters are not interchangeable, and all need suitable product preparation and even feeding.

Key purchase data

Product and objective: crop, size range, moisture, contamination and required grades or reject types. Method: dimensional screens, gravity deck, optical sensors or another principle documented by the manufacturer.

Throughput: result for the stated product, accuracy and reject rate, within the capacity of the complete line. Feeding: hopper, feeder, conveyor, layer uniformity and required pre-cleaning.

Utilities: power, voltage, compressed air, dust extraction, environmental limits and service space. Controls: recipe storage, calibration, diagnostics, software support and sensor availability.

Checking a used sorter

  • Inspect the hopper and feeders, screens or deck, fans, cameras and illumination, ejector valves, dust system, wiring and controller as applicable.
  • Run a representative sample and weigh accepted product, grades and rejects separately. One trial does not guarantee the same result on a different batch.
  • For upstream contaminant removal, also compare grain cleaners.
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