Barcode recognition can not be carried out, can be verified from several major aspects, first, the problem of barcode labeling, the second, the problem of barcode scanner, the third, the problem of barcode identification matching, the eight reasons will be distributed in these three different In the question.
First, the problem of barcode labels
â— Bar code cannot be identified Reason 1: Bar code quality is abnormal
The exception is:
1 Bar code is distorted, bar code is a relatively precise symbol system, and each code system has a corresponding ratio. 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.
2 Bar code strips are broken vertically, which usually occurs when bar code labels are printed using bar code printers. The main reason is that the print head breaks and the ribbon wrinkles.
3 The width of the blank area of ​​the barcode is not enough. The left and right margins of the barcode must be at least 10 times the width of the narrow strip.
4 Bar code and empty color match, the bar code reading depends on the color of the bar, the high reflectivity color will be recognized as empty, the low reflectance color will be recognized as a bar, in general, the white bar blue 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.
Second, the problem of the barcode scanner
â— Barcode cannot be identified Reason 2: 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 cannot be identified for reason 3: 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 cannot be identified Reason 4: 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 cannot be identified Reason 5: 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 (can be replaced);
2 barcode scanner scan head failure (repair or replacement);
3 Barcode scanner decoder board failure (repair or replacement)
4 Barcode scanner power board failure (repair or replacement)
Third, the problem of barcode identification matching
â— Barcode cannot be identified Reason 6: 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— Barcode cannot be identified for reason 7: Barcode scanner does not match bar code carrier
Bar code carriers are very important. Here are a few common carriers that match the scanner:
1 metal engraving barcode, barcode scanner that requires DPM characteristics;
2 PET and other brighter surfaces, need to use a bar code scanner such as laser;
3 The surface of the barcode carrier is covered with glass or film, and a bar code scanner with high power of the light source is needed;
4 Bar code carrier If you need to move, high speed or low speed, you need to use a barcode scanner with matching speed.
â— Bar code cannot be identified Reason 8: Barcode scanner does not match bar code 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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