基于PLC的丝网印刷机控制系统概论

基于PLC的丝网印刷机控制系统设计

摘要

由于丝网印刷在基板的大小和形状方面没有限制，可适应油墨，印刷油墨层厚度可调的特性而被广泛使用，因此，对开发控制精度高，性能高，操作简易方便的丝网印刷机是非常有必要的。

在本文主要介绍采用高性能的三菱PLC对原有老旧的丝印机电气控制系统进行设计改造的过程。在开发之前，对丝网印刷机的工作流程进行了详细分析，进而明确了控制系统的任务，再从硬件和软件两个方面进行改造。

在硬件设计方面，本文采用了三菱FX系列的PLC，其中选择了高性能的微处理器FX2N，并对其余各个模块进行了准确选型，完全满足了设备的要求，详细设计了触摸屏、电气原理图与PLC的通信接口。在印刷回墨控制方面，采用了交流伺服驱动系统来控制同步带实现图形的印刷。

在软件设计方面，该程序可仿真调试实现，手动程序，自动程序和复位程序三个部分。根据模块化的编程方法，对梯形图中的重要模块进行了详细的描述。在人机界面方面，利用相应软件开发出了触摸屏中的各个功能界面，提高了操作性能，方便操作者操作体验。

关键词：丝网印刷,可编程控制器,伺服驱动,触摸屏

Design of control system for screen printing machine based on PLC

Abstract

Because of no restriction on the size and shape of the substrate in the screen printing, ink to adapt to, the printing ink layer thickness adjustable properties, which can be widely used. Therefore, to develop high control precision, high performance, simple and convenient operation of the silk screen printing machine is very necessary.

In this paper, the use of high-performance MITSUBISHI PLC to the original old screen printing machine electrical control system design and transformation of the process. Before the development, the work flow of the screen printing machine is analyzed in detail, and then the task of the control system is defined, and then the hardware and software of the two aspects are reconstructed..

In the aspect of hardware design, this paper makes use of the Mitsubishi FX series PLC, in which the selection of the high performance microprocessor FX2N, and to the rest of the modules of the correct selection, fully meet the requirements of the equipment, the detailed design of the communication interface of touch screen, electrical principle diagram and PLC. In the aspect of printing ink control, AC servo drive system is used to control the synchronous belt printing..

In software design, the program can simulate debugging, manual procedures, automatic procedures and reset procedures for three parts. According to the method of modularization, the important modules in the ladder diagram are described in detail.. In the man-machine interface, the use of the corresponding software to develop a touch screen in the various functional interfaces, improve the operation performance, easy operator to operate experience. Key Words:Screen printing,programmable controller,Servo drive, touch screen

目录

1 绪论 (1)

1.1 丝网印刷及丝网印刷机 (1)

1.2 国内外丝网印刷机发展现状与趋势 (2)

1.2.1 国外丝网印刷机发展现状及趋势 (2)

1.2.2 国内丝网印刷机发展现状及趋势 (3)

1.3 课题研究的背景、目的及意义 (4)

1.4 本文研究的主要内容 (5)

2 系统的总体设计 (6)

2.1 丝网印刷机的工作原理 (6)

2.2 设计原则 (6)

2.3 整体设计 (7)

3 系统的硬件设计 (10)

3.1 三菱FX2N基本单元的I/O地址分配 (10)

3.2 丝网印刷机的电气原理图 (10)

3.3 丝网印刷机的PLC接线图 (12)

3.4 伺服电机的选型 (13)

3.5 PLC的基本结构与选型 (14)

3.6 三菱的FX2N-48MR主要技术数据 (16)

3.7 设计要求 (18)

3.8 安全保护措施的设计 (18)

4 丝网印刷机控制系统软件设计 (20)

4.1 系统软件的设计要求 (20)

4.2 PLC控制软件的设计 (20)

5 系统调试 (25)

5.1 安装布线的要求 (25)