Q: Classification of Barcode Scanners A: CCD Scanners and Laser Scanners
Q: Characteristics of CCD scanner A: The price is low, it belongs to low-end products, and the scanning distance is short. The main manufacturer is in Taiwan, and can directly read the Chinese postal code. There is currently a long-range CCD that compensates for the short depth of field of the scan, but the price is higher, between the CCD and the laser scanner.
Q: Features of the laser scanner A: The scanning speed is fast, the scanning distance is long, and the main manufacturers are in the United States, with low bit error rate and various types to meet different needs. It is divided into gun type, platform type and ceiling type, belonging to medium and high-grade products.
Q: The interface mode of the scanner A: keyboard interface mode, serial port mode, TTL mode
Keyboard interface mode: The data obtained by scanning the barcode is directly input into the computer via the keyboard interface. The advantage of this method is that no driver is required, the operating system has nothing to do, and it can be directly used on various operating systems without an external power supply.
Serial port mode: The data obtained by scanning the bar code is input by the serial port. It needs to be driven or directly read the serial port data, and an external power supply is required.
TTL mode: The scanning bar code obtains the TTL level, and further development of decoding and other circuits is required, and it cannot be directly used.
Q: Question about China Post Code A: The CCD scanner produced in Taiwan can identify this kind of domestic special code system. If the laser scanner needs to identify this code system, it must be customized.
Q: There are several reasons why you can't read the barcode. A: 1) The function of reading this barcode is not turned on.
2) The bar code does not conform to the specification, for example, the necessary blank area is missing, the contrast of the bar and the space is too low, and the width and width of the bar and the space are not suitable.
3) Direct sunlight, the photosensitive device enters the saturation zone.
4) The surface of the barcode is covered with a transparent material, and the degree of reflection is too high. Although the eye can see the barcode, the collector has strict reading conditions and cannot be read.
5) Hardware failure, contact your dealer for repair.
Q: On a laptop, the scanner on the keyboard interface is not working properly, or the scanner is normal and the keyboard is not working. A: On the laptop, the scanner on the keyboard interface is equivalent to an external keyboard.
The keyboard interface of the laptop may change if it is connected to the keyboard:
1) The original keyboard is invalid. At this time, the scanner is normal and the keyboard cannot work. 2) The keyboard of the notebook is normal, and the external keyboard does not work. At this time the scanner is not working
Solution:
1) Automatically set the BIOS to make the external keyboard work 2) Connect the keyboard interface scanner 3) Scan the scanner to the external keyboard 4) Or directly use the serial port or USB port scanner
Q: After reading a barcode, the scanner crashes
A: Due to the protection function of the scanner, if the read barcode data is transmitted incorrectly, it will automatically enter the protection state to prevent data loss. If the data that has not been successfully transferred is read, the scanner can be used again. If this happens, please check the connection and agreement carefully. After confirming the error, turn off the scanner and open it for normal use.
Q: Which scanner should I use?
A: CCD is generally used for occasions where the funds are relatively tight and the requirements are not high, such as general supermarkets.
The gun laser scanner is moderately priced, has a faster scanning speed and higher accuracy, and is used in demanding applications.
The platform laser scanner is slightly more expensive and easy to use, for occasions requiring speed and accuracy, such as high-end supermarkets.
Ceiling platforms are expensive and are generally used in the industrial sector.
Q: The scanner device is not powered. Answer: 1) The power supply is not good. 2) The fuse is blown. 3) The scanner power supply circuit is faulty.
Q: When the scanner has the following faults, please contact Qianyou Technical Department: 1) The indicator light is abnormal, the device can't work 2) There is abnormal sound 3) There is no laser line 4) The scanning distance is very close
Q: How to set up the barcode scanning device Answer: Under normal circumstances, it has been set for you. The general steps are like this:
1) Do initialization: Set All Default. At this point it is almost the same, but it may be necessary:
2) Add a suffix: Enter
3) Set the barcode to be recognized 4) If it is a serial port scanner, you should also set RS232 according to the corresponding port of the host such as communication speed, check digit, etc. 5) If it is a serial port scanner, for the host Also, you need to run the corresponding serial port driver all the time.
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