general type
China's "Universal Needle Printer" was a widely used Chinese character printing equipment in the early days. The number of needles in the print head is generally 24, which can be divided into wide lines and narrow lines. The print head slides back and forth on the metal rod to complete horizontal printing. The maximum printing width is 33cm, the printing speed is generally 50 Chinese characters per second (standard), and the resolution is generally 180dpi. The ribbon is used for printing, and the paper can be dragged and fed by friction, which can print both single-page paper and punched and folded continuous paper. Consumables such as ribbons and printing media are cheap. Due to electromagnetic impact, the print head generates serious heat when printing continuously for a long time, but the printing speed is not fast and the effect is not great; Moreover, because the universal needle printer is generally a wide-format printer, compatible with DOS system, it is especially suitable for ordinary offices and financial institutions with more report processing.
Universal stylus printers are easy to use. If the ribbon and paper are of poor quality or improperly installed, it is easy to break the needle. The printed words are too shallow, indicating that the coloring ability of the ribbon is reduced, which is easy to cause needle hanging and paper jam. At this point, the ribbon must be replaced. In addition, the ribbon of universal needle printer is not uniform and cannot be replaced by each other. The universal stylus printer has a manual adjustment lever to adjust the paper thickness. When the thickness of printing paper changes, the adjusting lever must be adjusted to adjust the printing depth and protect the printing needle.
Passbook pin type
With the development of electronization in various industries, passbook pin printers specially used for counter business in banking, post and telecommunications, insurance and other service departments have been rapidly popularized and applied. The so-called passbook needle printer is also called bill needle printer. Compared with other general needle printers, passbook needle printers have the following characteristics:
Push-type paper feeding: the design of push-type paper feeding channel reduces the printing deviation caused by paper bending and paper jam, makes the paper advance and retreat freely, and makes it possible to handle ultra-thick printing media;
Self-adaptive paper thickness: Passbook needle printer prints bankbooks and other bills, but the thickness of different bankbooks and bills is different, so passbook needle printer requires that it can automatically adjust the printing gap and impact force according to the printing media with different thicknesses, so as to achieve a clear printing effect with any thickness;
Automatic rectification technology: it can automatically adjust the printing medium, greatly improve the printing accuracy and make the operator's operation extremely simple;
Paper positioning technology: in order to make the printing format neat and consistent, photoelectric sensors are installed on the bracket of the paper transport vehicle to automatically detect the left and right boundaries of the paper. A plurality of photoelectric sensors are arranged at the paper feeding mechanism to detect the top position of the paper, so as to ensure that the paper is absolutely flat relative to the printing bottom plate. Then the printing position is completely accurate through the printing positioning instruction in the printer control software;
Magnetic stripe reading and writing function: provide an optional built-in magnetic stripe reader, which can read and write the user's name, card number, amount and other information on the passbook, and support ANSI, ISO, NCR, IBM, Hitachi and other magnetic stripe formats;
Print status identification: It has the function of two-way communication with the host or terminal, and can timely and accurately reflect the current status and errors of the printer and handle them accordingly. In addition, most passbook pin printers are specially designed to automatically stop printing when the cover is opened, which can prevent printing errors caused by human interference and protect personal safety.
Other functions: Some high-end passbook pin printers also provide some optional functions, such as sharing printers between two operators, automatically recognizing barcode page numbers, printing magnetic ciphertext, providing security decryption, printing special bank symbols, and automatically downloading and upgrading software by using Fresh-Rom storage technology.
The technical indicators for evaluating the passbook needle printer are mainly whether the equipment has good advanced paper processing ability, medium adaptability, convenience of operation, business processing speed, command simulation ability, simplicity of maintenance, durability of consumables and expandability of machine functions. In particular, the high-grade passbook printer should have the functions of automatic paper correction, automatic edge alignment and adaptive thickness printing, which can not only ensure the high accuracy of printing effect, but also make the operation extremely simple.
Wire needle
Line stylus printer is a high-grade stylus printer, which can meet the requirements of high-speed batch print business in banking, securities, telecommunications, taxation and other industries. Linear stylus printers have a strong tendency to print professionally, including special western printers and special Chinese printers. Compared with the general stylus printer, the line stylus printer has strong internal data processing ability. Because of the complex control of print head and paper feeding, master-slave dual CPU processing mode is generally adopted, which can greatly improve the printing speed and fully control the printing process.
The print head structure of linear needle printer is complex. In order to ensure that the linear needle printer will not break the needle due to overheating during continuous high-speed printing, the cooling mechanism inside the print head is very good. Linear needle printer has many printing needles and high frequency of needle output, so many effective measures and advanced technologies are adopted on the print head to reduce noise.
The key technology of line-pin printer is on the print head, and the output frequency of needle is as high as 2000Hz, which is more than twice that of general needle printer. Generally, the number of printing needles is 72, 9 1 needle, 144, and the most is 288, which is ten times that of a 24-needle printer. The print head of linear needle printer adopts modular structure (for example, the print head with 144 pins has 12 modules, and each module has 12 pins), and each module only needs to be responsible for horizontal printing for a short printing distance (generally about 1 inch), which is smaller than that of ordinary needle printers (generally more than ten inches).
The needle arrangement of printing needle module has great influence on the printing speed and performance of linear needle printer. Generally speaking, stylus printers can be divided into straight needle arrangement, oblique needle arrangement and parallel longitudinal arrangement.
Straight row means that the needles in the printing needle module are arranged horizontally and vertically. When the needle module moves horizontally left and right to print, it can only complete the printing distance of one horizontal point, and the printing height is1180 inch or1144 inch. The speed of the stylus printer in this arrangement can reach 1000 lines/minute. Therefore, the linear stylus printer is very suitable for printing and outputting western characters.
Oblique arrangement means that the needles in the printing needle module are obliquely arranged. When the needle module moves horizontally left and right for printing, the module can print several rows of horizontal dots with several needles. For example, the module of KD6000C line printer has 12 stitches arranged obliquely, and the speed of printing Chinese characters can reach 1000 Chinese characters per minute, which is more suitable for Chinese character output.
Parallel longitudinal arrangement means that the needles in the printing needle module are arranged in two parallel longitudinal rows, each module generally has 24 needles, and the speed is improved by adding multiple printing heads. This is an early line printing technology, and now it has been basically eliminated.
Line needle printer is a high-grade printer, and its printing needle life is more than 65.438+0 billion times per needle, but its life is affected by the quality of printing paper and ribbon.
High speed needle
High-speed stylus printer is a product between ordinary stylus printer and line stylus printer, and its main feature is very fast printing speed. High-speed stylus printer is expensive, but it has high printing quality and high printing speed, and can bear a large printing load, which plays an important role in the fields of finance, post and telecommunications, transportation, batch processing of enterprise printing data and so on.
The "patent" of stylus printer is the function of carbon paper and continuous paper printing, and high-speed stylus printer also has this ability. At present, the copying ability of high-speed stylus printers is generally 1.4 ~ 1.5 layer, which can better reach the copying ability of 1.8 layer.