China’s printed matter industry has a long history of development.It is divided into various industries,generally including publishing property,packaging materials,plastic products,thesis products,electronic products,etc.Its printed products are generally applied in various fields of economic and social daily life of the people.Along with the level of China’s economic and social sustainable development progress and the comprehensive national strength increased,the size of its printing industry has been continuously expanding,and gradually formed a in product knowledge,information becomes one of the main content of high efficiency and has the characteristics of can directly affect its global competitiveness of the industrial economic system.Although the printing industry is developing better and better,it is favored by more and more enterprises,but the quality of printing is difficult to be guaranteed.And the excellent printing quality is related to many factors,such as: ink system performance,type of nozzle,type of ink,etc.The ink supply system has direct influence factors.Based on this,this thesis gives the best design scheme for the ink supply system on the basis of fully understanding the characteristics of Ricoh Gen5 nozzle,analyzes and studies the influencing factors of the ink supply pipeline,and concludes that temperature and pressure difference are also one of the main elements affecting the printing effect of substrate.In this thesis,STM32F103 X chip is selected as the hardware control platform,the diaphragm pump,electromagnetic pump,heating plate control components programming control,and the traditional PID control algorithm on the basis of fuzzy control theory to increase the stability of the system,which also makes a certain introduction to the selection of components and control methods.Finally developed a set of scientific structure,complete function,good performance of negative pressure double cycle ink supply control system.The control system can control and detect the state and temperature of ink in real time,so as to provide relatively good ink flow in the nozzle cavity.Secondly,the efficiency of other related components in the system is tested,especially the sensitivity control of temperature and pressure,and the experimental data of related work is given,and the applicability of the design scheme is verified.At the same time,it also gives some relevant solutions to the shortcomings in the experiment,and makes sufficient preparations for the next step. |