For barcode guns, barcodes are generally not scanned. Why these scanning faults occur?

Here is a summary of the reasons why several scanners do not recognize barcodes:

1. The identified barcode is not opened. Some special scan network barcodes, the barcode scanner factory default is off, so to identify this type of barcode, you first need to open the barcode type through the setup manual.

2. The barcode itself does not conform to the specification. For example, the necessary blank area is missing, the contrast between the strip and the space is too low, the width and width of the strip and the space are not suitable, or the barcode printing is blurred, and the barcode is defective.

3, Strong direct sunlight. If scanners work under strong direct sunlight, reflected light will also be strong, so that the photosensitive device enters the saturation zone.

4. The scanning distance. The scanning distance is too far or too close, beyond the readable range of the scanner (the reading range of the red scanner is about 2CM, and the scanning distance of the laser scanner should be between 6 and 25CM).

5. The scanning angle. The scanning angle is not well mastered, and the vertical scanning is wrong. Because the surface of the bar code will be reflected, the reflected light will illuminate the mirror in the window of the scanner, which will interfere with the normal decoding of the bar code scanner. The correct scanning angle should be that the scanner is tilted at an angle to the bar code).

In the process of using, you will also encounter such a situation. After reading a barcode, the scanner will crash. Due to the protection function of the scanner, if the barcode data transmitted is incorrect, it will automatically enter the protection state, thus preventing data lost. If the data that has not been successfully transferred is read, the scanner can be reused. If this happens, please check the connection and agreement carefully. After confirming that it is correct, turn off the scanner and turn it on again to resume normal use.