First of all, it is necessary to analyze whether the quality of the barcode is up to grade. Of course, you can't buy a professional barcode detector for testing. Ordinary users can identify the quality of the barcode printing with the naked eye. As we all know, the barcode is made up of black and white bars according to the corresponding standards, so you can test one. If there are some white dots on the black bar, it can be judged that the quality of the code is not too good, but the better performance of the scanning gun can still be read out. If the black bar is incomplete, the code has been completely unreadable, it is recommended to detect the printing bar code equipment.
Two, check whether the printed bar code is complete and whether the printed bar code exceeds the label boundary. According to the scanning principle of two-dimensional scanning gun, bar code must be intact from left to right. Every black and white bar has its own meaning, and incomplete barcode can't be scanned even with a high-end scanning gun.
3. Check what kind of barcode is printed, that is, the type of barcode, the general market code system for code 128, code 39, code 93, EAN-13, etc., if you print the code system is not within this range, then you must open the barcode scanning gun other code scanning function. Special note: many customers will use CODE93 code to print, some scanning guns are not opened CODE93, so it must be set.
Four, check whether the bar code scanning gun is intact. The method is simple: we usually have barcodes of some commodities around us, if the beverage bottles, books, food packaging, these barcodes are printed, the quality is very good, if the barcode scanning gun still can not scan these barcodes, bar code scanning gun fault.
5. Check whether the content of the bar code printing is very close. Because of the restriction of the width of the bar code label, some barcode content is too long. The barcode scanning gun can be divided into ordinary scanning gun and high-precision barcode scanning gun. If the scanning gun is not of high precision, it can hardly sweep the bar code with high density. This is the problem of the matching of the scanned gun and the print content of the bar code. The way to detect mismatches is simple, and you can print barcode labels that are not long enough to test.