A Design And Implementation Of Numerical Control System For Melt Electrospinning Direct Writing Device

The collaborative cooperation in the field of diversified scientific research led by nanoscience promotes the wider application of nanomaterials in various fields.The melt electrospun fibers have been investigated in tissue engineering scaffolds as the nanoscale properties and structural characteristics of native extracellular matrix.Electrospinning is an efficient way to fabricate micro/nano fibers by electrostatically stretching a polymer solution or a melt.At present,there are still no standardized experimental equipment or recognized optimal solutions.Although the principle of the melt electrospinning device is similar and its composition is similar,there are still no standardized experimental equipment or recognized optimal solutions.The numerical control system often has problems such as low motion precision,long equipment development cycle,poor hardware generality,poor software reusability,and difficult two development and expansion functions.The open CNC structure system explores the establishment of a standardization interface,so that the various hardware and software of CNC products can be built according to actual functional requirements,which has great openness.In order to improve existing defects of melt electrospinning direct writing devices and shorten the cycling of numerical control system,a new melt electrospinning direct writing system based on near-field electrospinning was developed.This system provided a new open CNC system with a Googol GTS-400 motion controller and industry computer.Using Visual studio2010 programming in Windows 7,the basic framework of the application is set up first.Then a set of man-machine interface friendly manufacturing system control software is developed according to the application development of each functional module.The design and implementation of basic software functions and core modules are described at last.The interpreter function module is mainly used to solve the problem of reading and recognizing the format file,and converts the useful information extraction sequence after processing into the motion parameters that the motion controller can call.In order to expand the functions of the traditional numerical control system software,the software system has also added the explanation function module of the numerical control code.A set of parsing programs is compiled for the common G-format code files and DXF general graphics exchange files of NC system.Finally,two experiments are done to confirm the correctness of the parsing program and interpolation program through G code analysis and print verification experiments and simple DXF file analysis experiment.Firstly,according to the requirements of biological scaffolds in tissue engineering,a path planning scheme for printing three-dimensional grid scaffolds is designed.Then,the effects of three process parameters on the deposited morphology are verified by several groups of experiments,including the collection distance,the velocity of the substrate and the collection distance.Theoretical analysis of its effect and accuracy.Finally,referring to the single factor experimental conclusion,the feasibility of the numerical control system is verified by the patterned deposition experiment.The precision control on the direct writing position of the micro scale structure is realized.The fiber width deviation is controlled in a small range after the multilayer stacking,which provides guidance for the related research of the electrospun direct writing system.