There are many reasons for printer needle breakage, which are mainly reflected in the following aspects.
1. Inferior ribbon cassettes and ribbons are used. During the printing process, because the box cover of the inferior ribbon is not tightly combined with the box body, it is easy to cause the driven gear to fall out of its original position, and the main gear is not tightly engaged, which makes the ribbon slack. Due to the poor quality of the ribbon used, the ink on the ribbon will enter the needle seam of the print head along the guide hole of the printing needle and solidify, resulting in an increase in the resistance of the needle exiting the print head, which is likely to cause needle breakage or crush the parallel groove of the printing needle, which is more serious. It will burn the print pin driver chip or the ribbon motor and driver chip.
2. Ribbon installation is unreasonable. When rotating, the ribbon on both sides of the print head is reversed, wound, and deviated, which will cause the print needle to directly contact the character roller and wear the print needle, resulting in needle breakage.
3. Long-term printing wax paper is also easy to cause needle breakage. Because the paraffin on the wax paper will chemically react with the rubber on the character roll, deforming the rubber. At the same time, paraffin enters the pinhole of the printing needle guide plate, which reduces the elasticity of the printing needle return spring, and the printing needle cannot be retracted in time, resulting in needle breakage.
4. Extensive use of tabs to print forms is also likely to cause needle breakage. Because one or several needles corresponding to the horizontal line in the table are used too frequently and are under heavy load, it is easy to fatigue the return spring of the printing needle, resulting in poor elasticity, and the needle is broken due to the long duration.
5. Due to improper use by the operator, the gap between the front end of the print head and the character roller often changes. If the gap is too small, the force of the printing needle hitting the character roller is too large, which will easily cause the needle to break; if the gap is too large, the printed handwriting is too shallow, and the needle sticks out of the guide plate for a long time, which is also easy to break the needle. Therefore, it is also very important to adjust the gap between the front end of the print head and the character roller.
6. During the printing process, artificially rotating the character roller can easily cause needle breakage. When the printer is working, the print head moves continuously back and forth with the trolley, and has a certain inertia in the horizontal direction. If the character roller is rotated artificially, it is easy to cause broken needles, and often multiple needles are broken together. Therefore, when the printer is printing, it is very dangerous to manually rotate the character roller and must be prohibited.
7. Forcibly tearing the paper during printing will cause needle breakage. At this time, the ribbon core is tightly attached to the print head, so that the print needle can easily penetrate the ribbon and cause needle breakage.
8. Sudden shutdown or power failure during printing, so that the printing needle cannot be retracted in time, and may also cause needle breakage.
In view of the above reasons for needle breakage, we can take the following measures to prevent it, thereby improving the service life of the printing needle.
1. Clean the print head frequently. Generally, the print head should be cleaned after 3 months of use. Remove the fixing screw of the print head, remove the print head, soak 1-2 cm of the front end of the print head in anhydrous alcohol for 15 minutes, use a small brush to clean the dust and dirt on the pinhole, and then take it out to dry. Reinstall to use.
2. Use high-quality ribbon cassettes and ribbons, and check them strictly before use. The high-quality ribbon base has no obvious joints, no obvious roughness, and the broken marks seem to be broken. Some friends use staplers, pins, etc. during use.
3. Try not to print wax paper. If you want to print wax paper, remove a layer of tissue paper under the wax paper and place a sheet of printing paper on it to reduce the resistance of the lateral movement of the print head. After printing, the rubber character roller should be cleaned with anhydrous alcohol in time to ensure that the character roller is smooth.
4. Try to use better quality printing paper. Generally, the paper with uneven surface and joints is strictly prohibited to use.
5. Often change the method of printing horizontal lines. Reduce the load on the horizontal line printing needle, and do not continuously print forms for a long time.
6. Always check whether the gap between the front end of the print head and the word roller meets the requirements. According to the instruction manual of the matching printer, master the toggle direction and technical parameters of the “paper thickness adjustment stalk”, and determine the corresponding scale according to different paper to make it meet the requirements.
7. During the printing process, human rotation of the character roller should be avoided as much as possible. If you must adjust the line spacing and printing paper by rotating the word roller, you should make the adjustment after the printer is offline, and then print after the adjustment. If the paper must be torn off, the online button must be turned off first, and the printer must be offline before proceeding. It is strictly forbidden to plug and unplug the cable and move the print head manually.
8. Configure the UPS power supply for the printer. Ensure continuous power supply to prevent sudden power failure of the printer.