Research On A Micro 3D Printing System Based On Ac-electric-field-driven Electrohydrodynamic Jetting

In recent years,3D structures inspired by nature have received a lot of attention for their potential applications in fields like intelligence and new sensors.Realizing rapid customized preparation of 3D micro-nano structure prototypes is vital and difficult.Through the alternating electric jet method and high-precision multi-axis electromechanical motion system technology,a micro-3D printing system with both micro-printing scale and large printing range was developed,which contributes to the rapid development of new sensing structures and testing technologies.The following four aspects of research are the focus of this paper:（1）The alternating electric jet printing method was proposed,which is based on the basis of electrohydrodynamic,the overall design of the micro 3D printing system was completed;（2）In order to achieve both micro-scale and large-scale printing performance,a multi-axis motion scheme design for micro 3D printing was proposed:through the AC servo motor system and electric linear slide,the X₁ and Y₁-axis move rapidly in a large range,X₂ and Y₂-axis small-scale high-precision feed movement;R-axis rotates through stepper motor system and electric rotary slide;Z-axis realizes height adjustment through manual lifting table;The hardware design of the mechanical system has been completed for key components,such as electric linear slide table,electric rotary slide table,manual lift table and support platform;（3）An online motion control solution based on PC-motion controller-motor driver is proposed,and the hardware design of the multi-axis motion control system is realized;the human-computer interaction software design of the micro 3D printing system is completed using Lab VIEW and the basic motion control interface.Fixed-length motion,continuous motion,coordinate feedback,and program execution are the basic functions of the printing system;（4）The effects of solution properties and electric field parameters on electrojet stability are investigated,and the AC-electrojet parameters of the micro 3D printing system are further optimized.The placement inaccuracy of the micro 3D printing technology has been validated to be less than 25μm The printed pattern area can be up to 150mm×150mm.