Implementation of Carving Machine Controller Based on L293D
Contents
1. VI CONCLUSION A two axis winding machine control system based on embedded motion controller is designed in this paper The two axis winding machine control system hardware structure is completed Numeric control carving machine with 2 axis Simultaneous motioned locates in domestic universal demands Controller is realized based on embedded microprocessor and motion control technique Controller is easy to extend so it is universal In experiment the controller shows its feature of quick response high reliability It s a high performance and low cost option for corporation REFERENCES 1 Jun Li and Dongxing Qin Hui Li and Yang Chen Research on High Speed Laser Carving Control System Based on Embedded OS 2009International Conference on Mechatronics and Automation pp 15 64 2 Wen LungChang ShihT K Hui HuangHsu Detection of seam carving in JPEG images 2013 International conference P632 638 ISSN 2347 6389 Volume 2 Issue 3 February 2015 3 Mamadou Ngom and Fusaomi Nagata Basic Design of a Computer Vision Based Controller for Desktop NC Engraving Machine 2013 International conference 4 Gang Zhou Design of Carving Machine Controller Based On MCX314 International Conference on Electronic amp Mechanical Engineering and Information Technology 5 Azzat Al Sadi Manaf Bin Yahya Ahmad Almulhem Identification of image fragments for file carving 2013 World Congress on Internet Security 6 Haiyan2. Chenl Xue Wangl Zhiyu Gao2 liazhong Xul Four Axis Winding Machine Control System Design Based on the Embedded Motion Controller 2013 2nd International Conference on Measurement Information and Control 7 XU Ming XU Liping ZHANG Zhengyi The Development of Teaching NC Engraving Experimental System Based on PC MACHINE TOOL amp HYDRAULICS vol 37 2009 pp 151 153 8 QIN Zhong LV Yan ming MAO Rui Research on Open CNC System Based on Motion Control Cardin Circuit Board Engraving Machine MACHINE TOOL amp HYDRAULICS vol 37 June 2009 pp 45 47 9 CAO Fenggiong Numerical Control Machine Tool Improvement for Laser Carving JOURNAL OF ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY Natural Science vol 23 April 2008 pp 47 49 10 Zhuoda Jiang Yuntang Hu Design of NC Shoe last carving machine s HSC tool system 2011 pp 247 250 Ms Kalhapure Vrushali Arun Pursuing M E DS from Jaywantrao Sawant College Of Engineering JSCOE Pune INDIA Published By Blue Eyes Intelligence Engineering amp Sciences Publication Pvt Ltd
3. International Journal of Advanced Engineering and Nano Technology IJAENT ISSN 2347 6389 Volume 2 Issue 3 February 2015 Implementation of Carving Machine Controller Based on L293D Kalhapure Vrushali Arun Abstract A design project of implementation of Carving Machine Controller based on L293D platform is introduced in this paper ARM Advanced RISC Machines is the kernel processors of the control system which takes MATLAB as the software development platform and implements to develop a complete independent system that will automatically carve names or any other design on front surface of thermacol as a material L293D is selected as motor driving IC of numerical control device and ARM7 as central processing unit of controller The carving machine with low cost high speed good accuracy with easy HMI human machine interaction It is proved that the control system can effectively improve the efficiency and the machining quality of carving machine Index Terms ARM7 Carving machine HMI MATLAB I INTRODUCTION In recent years with the rise of thermocol processing Technology as a high tech product based on CNC Computer Numerical Control and the combination of mechanical optical electronic and computing technology has got more extensive application Thermocol carving is a new kind of technology which appears with the rapid development of the thermocol technique Patterns and characters can be carved on various materials
4. all the experiments which tests all on board peripherals Following are the salient features of the board Dimensions 121 X 87 mm Power DC 9V with power LED On board linear regulators generate 3 3V S500mA ISP and reset switch 12 0000 MHz crystal for MCU 32 368KHz crystal for RTC 16X2 character LCD with backlight Two RS 232 Interfaces For direct connection to PC s Serial port User potentiometer connected to ADC interface I2C interface with EEPROM RTC and Seven segment display Internal RTC On Board Connector for regulated 3V3 output On Board Connector for regulated 5V output Power Supply Reverse Polarity Protection B Driving Interface Driving interface circuits are between controller and stepper motor They realize photoelectric isolating and filtering of I O signal and amplify the output pulse to drive motor The output signals such pulse direction Signal driving chip L293D is used in output channel According to different application different driving device will be selected RS 232 is used for serial communication ICs It is interface between PC and microcontroller MI DESCRIPTION It will have many components in it The Complete system can be divided into two parts First part consists of a PC along with MATLAB This part is required to select and control the mechanical grid Operation starts from MATLAB code HMI is used to select Object profile in MATLAB code A GUI can be developed in MATLAB for easy m
5. an machine interface Various buttons will be provided in GUI which when pressed will send various commands to controller via serial port Both MATLAB and C programs in controller will be initialized with same baud rate This will ensure correct communication between PC and controller RS232 is used for serial communication Second part consists of microcontroller stepper motor driver circuit stepper motors servo motor and heating tip As per commands received from PC controller will calculate which stepper motor to move by how much amount Controller will apply rotating sequence 0001 0010 0100 1000 to various stepper motors which will result in rotation of motors and positioning for servo motor Heating filament near object As per Object profile feed inside the MATLAB code MATLAB will keep sending commands to microcontroller and Object will get carved accordingly on the thermacol Microcontroller to be used is ARM 7 To drive stepper motors L293D motor driver IC will be used We will be using stepper because of its property of changing degree of rotation in any direction with precise step angle IV SOFTWARE DESIGN OF CONTROLLER Embedded C language achieves system software based ARM We have implemented MATLAB code and MATLAB GUI We are using Keil software for compiling C code C code is getting converted into hex file by this software To load hex file into ARM7 We are using Philips flash Utility for LPC2148 The Communication baud
6. by the application of thermocol carving computer graphics and digital image processing 1 Numerical control carving machine is applied to print label woodwork human faces and figures walking sticks relief carvings kitchen spoons furniture decorations and many others 5 The system stability and reliability is totally depended on the computers The control system of thermocol carving machine designed in the paper is based on MATLAB It takes ARM as embedded hardware platform Single chip computer is selected as processor of economical numerical control system They are 8bit 16bit or 32bit System is open loop control stepper motor and Servo motor are used 4 ARM7 LPC2148 is applied to carving system and the system can realize 2 axis motion control The system is multi coordinate high accuracy and high speed requirement If HARDWARE STRUCTURE ARM7 series is general purpose microcontroller NXP Philips The ARM7TDMI S is a general purpose 32 bit microprocessor which offers high performance and very low power consumption Manuscript Received on February 2015 Ms Kalhapure Vrushali Arun Department of Electronics and Telecommunication JSCOE Hadapsar Pune India LPC2148 is one of ARM7 series microcontroller with ARM 7TDMI High capability Flash inner SRAM and rich peripheral 4 The microcontroller is used to realize the implementation of interface stepper motor driver communication with computer and fast response to the st
7. epper motor and servo motor We are using L293D as stepper motor drivers It is used for position speed and interpolation controls It had been applied to numerical control machine tool carving machine industrial robot etc L293D contains two inbuilt H bridge driver circuits It is designed to drive inductive loads such as relays solenoids dc and bipolar stepping motors as well as other high current high voltage loads in __ positive supply applications This device is suitable for use in switching applications at frequencies up to 5 kHz H bridge would be preferable where a smaller physical size is needed high speed switching low driving voltage or where the wearing out of mechanical parts is undesirable To control motor speed we can use pulse width modulation PWM applied to the enable pins of L293 driver Stepper motors provide a means for precise positioning and speed control without the use of feedback sensors As the stepper changes its direction carving will take place at the co ordinate position MAX232 is a widely known IC used for establishing serial communication bet Microcontrollers and Personal Computers PC LPC 2148 has 128 bit wide memory interface and unique accelerator architecture enable 32 bit code execution at the maximum clock rate 1 LPC 2148 is CPU and MATLAB is used as easy HMI MATLAB sends Commands to LPC2148 by serial port and complete progress of work being carved can be visualized on MATLAB As showed in F
8. ig 1 the hardware includes microcontroller stepper motor driver circuit and hot tip Serial Communication 1 Stepper motor Stepper motor driver 1 Stepper motor driver 2 Fig 1 Generalized block diagram Microcontroller LPC 2148 z Published By Blue Eyes Intelligence Engineering amp Sciences Publication Pvt Ltd Implementation of Carving Machine Controller Based On L293D A Basic Peripheries L293D is supplied by 5V power LPC 2148 core voltage is 1 8V On chip peripherals voltage is 3 3V and other peripherals voltage is 5V So system needs for three sources SV 3 3V 1 8V The LPC 2148 is Low power Real Time Clock RTC with independent power and 32 kHz clock input Development Board can be used to evaluate demonstrate applications prototyping the capabilities of NXP LPC2148 microcontrollers The LPC2148 microcontroller has 512KB of internal flash and 32 8K RAM can be clocked up to 60Mhz LPC2148 features include 2xUARTs RTC 2x10bit ADCs each ADC has multiple channels 1xDAC 6XPWM 2xI2C 1xSPI 1 XSSP 2x32 bit TIMERS FAST I 0 support and WDT 4 LPC2148 also supports In System Programming ISP Development Board contains the following items LPC2148 PB V 1 DEV board 12V 1A power adapter 1 x Serial cable 1 x CD which contains KEIL evaluation version installer Flash Magic Installer schematics user manual Programming files for experiments KEIL workspace for
9. rate between MATLAB code and ARM7 is set to be 9600bps MATLAB is a high performance language for technical computing It integrates computation visualization and programming in an easy to use environment Algorithm 1 Initialize COM port with baud rate 9600bps 2 Get image from user interaction 3 Start operation on user command 4 If input image is not in binary format then convert it into binary 5 Read image pixel by pixel 6 Set 1 j as counter for row and column respectively 7 Position hot carving tip ati jJ coordinate on thermacol using stepper motors 8 Insert tip into thermacol by actuating actuator 9 Move to next coordinate and repeat this same Procedure till complete design finishes V RESULT Fig 2 is the input image to be carved Fig 2 Input Image Published By Blue Eyes Intelligence Engineering amp Sciences Publication Pyt Ltd International Journal of Advanced Engineering and Nano Technology IJAENT As shown in fig 3 we have designed a image on MATLAB GUI Fig 3 MATLAB GUI The machining material is a kind of thermacol with 1 5mm thickness The duration of the thermacol cutting process is less than 10 minutes The processing sample is shown in Fig 4 which is 15cm long and 10cm wide As shown in the figure the sample not only reflects the details of the original graphics but also the machining quality and efficiency is satisfactory Fig 4 Result on thermacol
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