Research On Key Technology Of High Precision Ink Jet Positioning System

Ink jet positioning system is a kind of device platform based on the position of the print image as the benchmark,which can improve the positioning accuracy of the ink jet points of printing equipment such as inkjet coding,inkjet polishing and so on by adjusting the position of the ink jet unit composed of the ink jet head through the mechanical mechanism.At present,it has become a research hotspot in the field of printing and packaging.Compared with the traditional measures such as increasing the stability of the machine and improving the quality of the parts,the ink-jet positioning system has the technical advantages of eliminating the accumulated error,greatly reducing the rejection rate of the ink-jet printing,and achieving the printing accuracy of0.1mm.However,there are still some problems such as low stability of the system,great influence of residual vibration,and lack of optimization of structural parameters.In view of the above problems,this paper proposes a new high-precision ink-jet unit positioning platform system,the main contents are as follows:In order to enhance the stability of the ink-jet positioning system,the mechanical structure of the system is analyzed and studied.The "servo motor + ball screw" is used to drive the ink-jet unit to ensure the lateral positioning accuracy of the ink-jet.The moment servo motor is used to rotate the nozzle in a small range to ensure the rotation positioning accuracy of the nozzle.In order to reduce the residual vibration of the ink-jet positioning system,the acceleration curve,the velocity curve and the displacement curve of the ink-jet unit are firstly planned by using the seven stage asymmetric S-curve to control the initial velocity and acceleration of the residual vibration.By adjusting the R value of the ratio of acceleration to deceleration,the residual vibration can be controlled.Through the analysis of the mathematical model of residual vibration,the relationship between the residual vibration and the relevant parameters is obtained by taking into account the structural stiffness and damping of the system,which provides a solution for the control of residual vibration.In order to improve the reliability of the ink-jet positioning system,the overall dynamic model of the system is established.The static simulation of the mechanical structure of the ink-jet positioning system is carried out by using ANSYS software,andthe position with large stress and strain is improved.At the same time,the modal analysis is carried out by using ANSYS software,and the natural frequency of the system in each mode is obtained,which provides a basis for determining the working area of the positioning system reasonably.In order to verify the research results of this paper,through the test of the field experimental prototype,the results show that the theoretical analysis results of this paper are highly consistent with the test results of the experimental prototype,which proves the correctness of the theoretical analysis of this paper.