Possible reason why the scanner cannot recognize the barcode
For barcode guns, barcodes are generally not scanned. Except for the reason that the barcode scanner itself may not be read due to insufficient accuracy, incorrect settings, hardware failures, etc., it is often possible that barcode labels are abnormal or barcodes. The problem of identifying problems such as mismatching is summarized here. Xiaobian here summarizes the reasons why several scanners cannot recognize barcodes:
â— Barcode scanner is not accurate enough
In the process of making barcodes, the density is 1mil, 2mil, 3mil, 4mil, 5mil, etc. When barcode identification is performed, the barcode scanner must have higher reading accuracy than the identified barcode. For example, scanning 3mil barcodes must be Use a scanner with a density of 2mil or 3mil scanning accuracy.
â—Barcode scanner code system is not activated
When the barcode scanner is shipped from the factory, in order to optimize the decoding performance of the scanner, some unusable code systems are locked. When your barcode is just within the lock code system, it will be unrecognizable. You only need to Use the setup manual to open the code system.
â—Barcode scanner settings are confusing
In the process of using the barcode scanner, the barcode scanner setting is confusing and the barcode cannot be recognized due to scanning of some special setting barcodes. It can be processed by restoring the factory-set barcode in the manual.
â—Barcode scanner hardware failure
Barcode scanner hardware failures cause bar code unrecognized (mainly sorted according to the probability of failure):
1 barcode scanner data cable is damaged (replaceable);
2 barcode scanner scan head failure (repair or replacement);
3 barcode scanner decoding board failure (repair or replacement)
4 barcode scanner power board failure (repair or replacement)
â—The bar code quality is abnormal:
1 bar code is deformed, bar code is a relatively precise symbol system, and various code systems have corresponding ratios. In the process of bar code making, the bar code can be freely deformed, and the result that bar code cannot be recognized will occur, especially using Coreldraw, etc. When the graphics software makes barcodes.
The bar code of the 2 bar code is broken vertically, which usually occurs when the bar code printer prints the bar code label. The break of the print head and the wrinkling of the ribbon are the main reasons.
The width of the 3 barcode blank area is not enough, and the left and right blank edges of the barcode must be at least 10 times the width of the narrow strip.
There is a problem with the 4 bar code and the empty color. The bar code reading is different depending on the color of the bar. The high reflectance color will be recognized as empty, and the low reflectance color will be recognized as a bar. Generally, the white bar has a blue bar. The bar code can be read, the bar code of the red bar on the red bottom can be read, and the bar code of the yellow bottom purple bar can be read. Generally, the bar code of the red bar on the white background cannot be read, and the bar code of the black bar on the blue bottom cannot be read.
â— Barcode recognition matching problem: barcode scanner does not match the live light source
Bar code scanner has a more important parameter, which has been less concerned. This parameter is light resistance. For bar code recognition, attention should be paid to the matching of the light resistance between the field source and the bar code scanner, otherwise it will cause unrecognized conditions. It is more prominent when scanning some screen barcodes.
â—The barcode scanner does not match the barcode carrier
Bar code carriers are very important. Here are a few common carriers that match the scanner:
1 metal engraving barcode, need to use the barcode scanner of DPM characteristics;
A brighter carrier such as 2PET requires a barcode scanner such as a laser;
3 barcode carrier surface covered with glass or film, need to use a bar code scanner with high power source;
If the bar code carrier needs to be moved, high speed or low speed, it is necessary to use a bar code scanner whose matching speed is matched.
â—The barcode scanner does not match the barcode system.
In some industries, the code system is quite special. For example, the domestic Longbei code can not be read by the commonly used barcode scanner. It must be matched with a special barcode scanner.
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