Why can't the scanner scan the barcode?
Why can't my barcode scanner scan a barcode? Many people who have used barcode scanners have encountered similar issues. When encountering this problem, many people immediately assume there's something wrong with the scanner. This isn't always the case. There are many reasons why a scanner can't scan. Only by identifying the cause can we accurately remedy the problem.
1. analyze the printed barcode to see if it's complete. While you can't purchase a professional barcode scanner, the average user can easily determine its integrity with the naked eye. As we all know, barcodes are composed of black and white bars according to specific standards. Check the clarity of the printed black bars. If there are white spots on the black bars, the barcode isn't good, but a high-performance scanner can still read it. If the black bars are incomplete, the barcode is completely unreadable. It's recommended to inspect the device that prints the barcode.
2. Check the printed barcode to see if it's complete and whether it extends beyond the label's boundaries. According to the scanning principle of a barcode scanner, the barcode must be complete from left to right. Each black and white bar represents a specific meaning. Even the most advanced scanners cannot scan incomplete barcodes.
3. Check the barcode format (i.e., the type of barcode) used. Commonly used barcodes include Code 128, Code 39, Code 93, and EAN-13. If your printed barcode is not within this range, you must enable the barcode scanner's scanning function for other barcodes. A special note: Many customers use Code 93 for printing, and some scanners don't have this function enabled, so this must be enabled.
4. Check the barcode scanner for proper function. The method is simple: We all see barcodes everywhere, such as on beverage bottles, books, and food packaging. These are printed with high-quality barcodes. If your barcode scanner still can't scan these barcodes, it indicates a problem with the scanner.
5. Check whether the barcode content is compact. Due to the width limitation of the barcode label, some barcodes are too long and must be scaled down to print completely. Barcode scanners are divided into standard scanners and high-precision scanners. If the scanner is not high-precision, it will not be able to scan high-density barcodes. This is due to the mismatch between the selected scanner and the printed barcode content. The method to detect mismatch is simple: print a barcode label with short data content first for testing.