printer has stopped printing

methods of error detection: Occasional, odd, high and low. Of course, no check bit is also possible. For even and odd checks, the serial port sets the check bit (one after the data bit), using a value to ensure that the transmitted data has an even or odd logical high. For example, if the data is 011, for parity, the check bit is 0, and the number of bits that are logically high is an even number. If it is a parity check, the check bit is 1, so there are 3 logical highs. Highs and lows are not

Friends who often use printers should know that the biggest headache is the garbled print. The reasons for this are complex. This article focuses on the hard and soft faults for printing Garbled text. The purpose is to improve the capability of printing Garbled text for maintenance, so that everyone can no longer be helpless in the face of printing Garbled text!

In the previous blog post, I mainly described how to get and set the system's default printer, this article will describe how to monitor the status of the printer in real-time, recording the printed documents, the number of copies printed, as well as the printing time and other printing information.1.

Perhaps you will say that the printing material with the printer is not simple, first run the document editing program, and then enter the material content in the editing window, and then the appropriate layout editing, and finally click the "print" command can print out the material, which has such trouble. Indeed, the current operation of printing materials sim

Some time ago, I developed a Web express order Printing program for a friend. The program itself is very simple, with thousands of lines of code. I can do it over the weekend, because it is too simple, I only call it a program, not a system. However, after using it, my friend raised a pertinent requirement that the express Waybill was printed by a dot matrix printer, while the document was usually A4 paper,

Hardware preparation:Connect the built-in printing server (such as 620N and 615N) or the external printing server 300X, 500X, and 175X) to the printer, and connect the printer to the corresponding network environment through the network cable; Print the configuration page of the network

"2015 China Central Investment and trade fair" May 18 opened the curtain in Wuhan, Hunan Province Business Department organization of our province on behalf of enterprises active participation . among them , farsoon High-Tech limited liability company as the domestic 3D printing industry leader in the exhibition released the world's first open source customizable metal 3D printer fs271m, Become a major hig

Aspect 1, the built-in processor operating frequency and computing power. It is the high speed of the printer is an important condition, common is the use of RISC processor, working frequency at least 50MHz, high-speed products can reach 100MHz. Aspect 2, the memory configuration size, the maximum can support expands to how many. Generally speaking, the larger the memory capacity, the faster the printing s

"The thought of the last century, the technology of the last century, the market of this century", in fact, 3D printing technology is not a new product. At present, 3D printing technology has been favored by people, but also arouse people's passion for 3D printing. Because the benefits given to us are not confined to the decline in production costs, which in turn

Linux Printing principle Under Linux, the spool (spooling) printing method, when the user needs to print a file, the file is not sent directly to the printer, but sent to the spool directory, and then a responsible for printing the background process to send the data into the print