Control circuit of dot matrix printer

Abstract

The invention provides a control circuit of a needle printer. The control circuit of a needle printer comprises a CPU and a field programmable gate array device; the CPU is connected with each of the field programmable gate array device and a paper feeding motor of the needle printer; the field programmable gate array device is connected with each of a carriage unit motor and a printing head of the needle printer; the CPU is used for processing data to be printed, calculating to obtain a printing command and a paper feeding command, transmitting the printing command to the field programmable gate array device, and transmitting the paper feeding command to the paper feeding motor; the field programmable gate array device is used for controlling the carriage unit motor and the printing head to print according to the printing command; the paper feeding motor is used for controlling paper feeding according to the paper feeding command. The control with high real-time requirement is realized by the field programmable gate array device, the control with low real-time requirement is realized by the CPU, the response speed is improved, and the performance requirement of the field programmable gate array device is also reduced, so that the cost is reduced.

Description

technical field [0001] The invention relates to the field of printers, in particular to a control circuit of a dot matrix printer. Background technique [0002] A dot matrix printer is a device that uses a printing needle to print ink dots on printing paper to complete printing. The basic principles are: 1. The print head includes a printing needle and an electromagnet. Under the action of the electromagnet, the printing needle can print ink dots on the printing paper through attraction and release; With the cooperation of relevant mechanical devices, by moving the print head, the position of the printing points can be arranged, so as to realize the printing of specified characters, Chinese characters and graphics. [0003] Dot matrix printers usually consist of two parts, including the mechanical part and the electrical control part. Among them, the electrical control part converts the text and graphic information to be printed into the pulse width signal used to control ...

AI Technical Summary

Problems solved by technology

[0006] The above scheme uses the FPGA chip to control the printer, but all the control of the print head and the control of the paper / carriage motor in this scheme are realized through FPGA, which requires the use of high-end FPGA chips with large capacity, high cost, and a large number of IOs. achievable, cost prohibitive

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