1. Try changing notepad and WORD software. If it is normal, it may be the compatibility and setting of printing software. If it is not normal, please continue with the following judgment.
2. Check whether the driver is a regular driver in official website. If not, it is recommended to download the official website driver and try to reinstall it.
3. Restart the printer background service, enter the command Services.msc in the computer running dialog box, enter the system service list, find the background printer from the list, right click, select properties, click Stop, then press OK, then restart the printer and try to start the service.
4. Check whether the data cable is lengthened or an adapter is used. It is recommended to use a standard printer cable with a length of1.5m. ..
5. Whether it is a computer virus, please try to kill the virus through anti-virus software.
Suggestion: seek professional maintenance to prevent your own maintenance mistakes.
Working principle:
Overview of principle
The printer itself is a microcomputer system, and the work of the whole machine is controlled by CPU. Its control program is stored in ROM, so that the CPU can work when it is turned on. The CPU can receive various control instructions from the panel and instructions from the host, and interpret and execute various instructions. These connections are realized through computer interfaces. Generally, there are two working modes, namely text mode and bitmap printing mode.
1. Text mode
The print data of the stylus printer is obtained from the host computer through the interface with the computer. The print data obtained by the printer is the ASCII code of the characters to be printed, and these ASCII codes are stored in the print buffer of the printer. Every time the host fills up the print buffer, the printer will send a "busy" signal to the host. After receiving the signal, the host computer stops sending data, and then the printer starts printing.
After printing starts, the CPU in the printer takes out the ASCII code of the printed character from the print buffer, and obtains the first address of the character dot matrix storage area corresponding to the character through calculation. Take out each column of dot matrix code one by one according to the address, drive the printing needle, impact the ribbon, and form printed characters on the printing paper. In the ROM of the printer's character generator, there are usually 96 kinds of ASCII codes and font codes of some special characters (some printers also have dot matrix codes of Chinese characters, such as LQ- 1600K). When the data in the buffer is printed, the printer is turned on again to receive the new printing data sent by the host and start a new printing process.
If graphics or Chinese characters need to be printed (for printers without Chinese font library), the host can send pixel signals of graphics or Chinese font codes. Obviously, this printing method is similar to the way a display displays characters.
2. Bitmap mode
In this way, the printing data sent by the computer is the data to control the printing needles, and the programmer can directly write programs to control each printing needle, thus printing out graphics, tables and Chinese characters.
principle of operation
The main component of a stylus printer is the print head. Generally, 9-pin, 16-pin and 24-pin printers refer to the number of printing pins on the print head. According to the needle striking mode, the print head can be divided into solenoid type, high-five type, energy storage type, sound factor type and piezoelectric type. Here, taking the print heads of 24-pin printers LQ- 1600K and AIz3240 as examples, their working principles are explained. The picture on the right shows the working principle of LQ- 1600K print head, which is a snap-in print head. In front of each printing pin (looking forward from the back of the printing pin), there is a circular choke. Around the circular choke, there are 12 coils and 12 printing pins (LQ 1600K). The print head is divided into two layers, each layer has 12 printing pins, and the upper layer has 12 printing pins.
As can be seen from the figure, at ordinary times, the printing needle is in a state of leaving the driving coil under the elastic force of the return spring. When the drive coil is energized, the armature at the tail of the printing needle is excited to move towards the drive coil, and at the same time, the printing needle is driven to impact the ribbon along the multilayer guide plate, so that the ribbon and printing paper are pressed towards the winding. At this time, the ink on the ribbon penetrated into the printing paper by the impact of the printing needle, leaving small dots. When the current in the driving coil disappears, the printing needle is reset to the original state by the reset spring, and the printing action is completed. This kind of print head has the advantages of fast printing needle acceleration and high needle output frequency. Because the printing needle is divided into two layers, it is more conducive to replacing the printing needle, and the long needle can also be used as a short needle when it is broken.
The left picture shows the working principle of AR3240 print head, which is an energy storage print head. On the back of each printing needle (looking forward from the back of the printing needle), there is an annular choke iron, and 24 degaussing coils, 24 armature springs and 24 printing needles are arranged around the annular choke iron. Twenty-four printing needles are evenly arranged on the circumference of the ring, and pass through the top of the print head along the guide groove on the guide plate to form two rows of parallel printing needles.
As can be seen from the figure, the working principle of the energy storage type print head is that the permanent magnet acts on the spring, so that the print needle is in an energy storage state, that is, the print needle stores striking energy, and when the degaussing coil is energized, a magnetic field opposite to that of the permanent magnet is generated, that is, the magnetic flux of the permanent magnet is reduced, and the attraction of the permanent magnet to the armature and the spring leaf at the back of the print needle is counteracted, so that the spring leaf drives the print needle to fly forward and complete the printing throwing action. The advantages of this print head are low power consumption and high printing speed.