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A garlic sorter should remove foreign material without removing too much saleable garlic. Good-product carry-over measures how much acceptable garlic leaves with the reject stream, making it one of the most useful indicators in a machine test.
Why good-product carry-over matters
A demonstration often focuses on the reject bucket. The more important commercial question is what remains in that bucket besides the target defect. If good garlic is rejected together with stones, stems, soil or moldy pieces, the plant may lose yield and create extra rework.
This is why carry-over should be reviewed alongside defect removal. A program that aggressively rejects material may look clean, but it may not be the best production setting if too much acceptable garlic is lost.
Define “good product” before the test
The calculation is meaningful only when the accepted-garlic standard is agreed in advance. Decide whether slightly damaged, small or partially peeled pieces count as acceptable. If different grades have different standards, test them separately.
WESORT’s garlic sorting solution can be tested with the customer’s good garlic, target rejects and borderline material. The test should use the same definition that will be applied in production.
Step-by-step carry-over test
- Weigh a representative mixed sample.
- Separate or record the total acceptable garlic in the original sample.
- Run the sample through the sorter under defined operating conditions.
- Collect the reject stream separately.
- Inspect the reject stream and remove the acceptable garlic found inside it.
- Weigh that acceptable garlic.
- Repeat the test with additional sample portions.
Good-product carry-over (%) = acceptable garlic in reject stream ÷ total acceptable garlic in original sample × 100
Do not confuse carry-over with other test results
Carry-over is not the same as sorting accuracy, accepted-product purity, reject rate or defect-removal rate. Each metric answers a different question.
- Carry-over: How much acceptable garlic was lost with the rejects?
- Accepted-product purity: How much of the accepted stream meets the product standard?
- Defect removal: How much target foreign material was removed?
- Reject rate: How much total material entered the reject stream?
A proper test report should show these values separately instead of combining them into one “accuracy” number.
Test conditions must stay consistent
Keep the same feed rate, sample composition, air conditions, sorting direction and operating program when comparing two machines or two settings. Changes in overlap, dust, particle size and moisture can alter the result.
Run several portions rather than relying on one small sample. If the plant handles different garlic suppliers or grades, test more than one representative lot.
How to use the result for machine selection
The lowest carry-over is not automatically the best result if too much foreign material remains in the accepted garlic. The plant must decide which outcome has greater commercial importance: maximum impurity removal, minimum good-product loss or a balanced result.
In some plants, a balanced first pass followed by a second pass may be more practical than one aggressive setting. In others, a strict one-pass standard may justify a different program or line arrangement.
How WESORT supports the test
WESORT can help define the sample groups, test conditions and reporting method before the machine is selected. This allows the customer to compare results using the same standard and to discuss program adjustments with clear data.
Need a garlic sorter test report?
Send WESORT your good garlic, reject samples and target quality standard through the contact page. We can help arrange a test and review the carry-over result for your application.https://www.wesortcolorsorter.com/
Shenzhen Wesort Optoelectronics Co., Ltd.
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