Hand-held inkjet printers are also known as hand-held inkjet printers. It is famous for being light and easy to use. Its technical applications are basically concentrated in equipment, special middleware, repeated changes in information content, and many changes in the logo. It is difficult to complete the load of industrialization and production assembly line, such as heavy industry machinery industry, field construction team, logistics distribution center and other locations. Many people ask: Now that the hand-held inkjet printer can achieve the task of marking the heavy industry machinery enterprise, why sometimes it still cannot be completed? The handheld inkjet printer is equipped with a synchronization wheel, and the synchronization wheel can only send the coding command to the marking machine when it operates on a relatively parallel surface, so as to realize the coding. In some heavy industry machinery manufacturing industries, the parts that need to be coded are a bit special, and there are no sufficient coding conditions for the printer to operate, so hand-held printers cannot be used. Hand-held inkjet printers will always encounter customers' disputes about their technical application in actual use. In the process of familiar hand-held inkjet printers, there will always be some problems that cannot achieve the coding task or some hand-held inkjet printers. However, the code machine can easily handle the problem, the hand-held inkjet printer is the basic element of the heavy industry machinery manufacturing industry in the actual application. At the same time, the materials of the surface layer of the products in the heavy industry machinery manufacturing industry are different, and the ink types of the related inkjet printers are also different. In many cases, the information content marked by the handheld inkjet printer is difficult to adhere to the surface of the finished product for a long time. This is one of the reasons why the heavy industry machinery industry cannot use hand-held marking machines. In addition to the above, when the heavy industry machinery manufacturing industry purchases a handheld inkjet printer, it must also consider the operating conditions of the inkjet printer and the adhesion of the ink.