How to Sort Beans by Color and Visible Defects in Mexico

　　The best bean-sorting result does not begin with a machine setting. It begins with a clear description of the beans you want to pack, the defects your buyer rejects and the amount of good product you are prepared to lose.

　　Short answer: clean and size the beans first, present them in a stable single layer, use optical inspection to classify visible color, shape and surface differences, then verify both accepted quality and good-bean carryover from the reject outlet.

　　Start with the commercial grade, not a generic “bad bean” setting

　　Black beans, pinto beans, white kidney beans, chickpeas and lentils do not share the same acceptable appearance. A lighter bean may be a defect in one lot and normal variation in another. Before configuring a bean color sorter in Mexico, put actual accepted and rejected samples on the table and agree on the boundary.

　　Define the bean variety, crop origin, moisture condition, size grade and final market. If two customers buy different visual grades, keep separate programs and reference samples. The WESORT bean color sorter range includes configurations for different bean types and production scales, but the program still needs to reflect the processor's own product standard.

　　Which visible bean defects can optical sorting target?

　　With suitable contrast and presentation, optical inspection can be configured to separate visible differences such as off-color beans, dark or light beans, spots, wrinkles, splits, broken pieces, peeled skin, surface damage and visible insect holes. It can also target distinguishable leaves, sticks, stones or other foreign material.

　　The wording matters. A camera can respond to a visible surface sign; it does not certify that every internally damaged or microbiologically unsafe bean has been removed. If the risk is not visible on the presented surface, another inspection method or control step may be required.

　　WESORT's bean knowledge base covers common sorting examples across kidney beans, broad beans, chickpeas, lentils, mung beans and soybeans. The portfolio includes conventional chute machines and selected multi-angle AI options for difficult surface defects. Whether added inspection or a larger multi-channel bean sorter is necessary should be decided from sample results, target output and the actual defect distribution—not from a feature list.

　　Place optical sorting after basic cleaning and size control

　　An optical sorter is a visual decision stage. It should not be expected to do the work of an aspirator, screen, destoner or magnet. Removing dust, loose light material and large contaminants upstream makes the feed more stable and leaves the optical stage to focus on the defects that mechanical equipment cannot separate by size, weight or airflow.

　　A practical sequence is intake and pre-cleaning, screening or size grading, density or stone separation where required, optical sorting, accepted-product inspection and packing. Reject material can be checked to decide whether a controlled recovery pass is economically useful.

　　Measure accepted output and good-product loss together

　　Feed rate alone is not the number a bean processor sells. The useful number is accepted product per hour at the agreed quality. Increasing feed too far can crowd the inspection zone, while aggressive sensitivity can send more good beans into the reject stream.

　　During a test, weigh the feed, accepted stream and reject stream. Hand-check representative samples from both outlets. Record defect concentration, recipe, feed setting and pass arrangement. This gives the buyer a result that can be compared with actual orders instead of an isolated accuracy claim.

　　A WESORT sorting project in Mexico shows the value of matching the program to the processor's own seed and grain quality goals. The same discipline applies to beans: the raw lot and the finished grade determine the solution.

　　What to send for a representative WESORT bean test

　　Prepare one mixed production sample rather than a hand-made sample containing only obvious rejects. Also send separate accepted and rejected reference samples, photos of the current process, expected accepted output per hour or shift, incoming defect percentage and available power and compressed air.

　　If the plant handles several bean varieties, list the changeover frequency and required grades. This helps WESORT evaluate whether a chute configuration, a multi-angle option or another conveying approach is appropriate and how the programs should be organized.

　　Test Your Mexican Bean Samples Before Choosing a Machine

　　Send WESORT your bean variety, mixed raw sample, defect targets, accepted-grade sample and required output. The team can review visible separability and propose a test and configuration around your real production conditions.

　　Contact WESORT about a bean sorting test in Mexico.