 Hello everyone, myself Professor Preeti Stutte working as an assistant professor in mechanical engineering department in Walshian Institute of Technology. So in our today's session, we will learn what are the different types of hardware that we can use in the computer edit design system. That is hardware standalone system for computer edit design system. So these are the learning outcomes. So the students can be able to apply computer edit design fundamentals as well as the advanced manufacturing technology to industry problems. So first we will have the recap of the fourth session. So we have discussed like the benefits of the computer edit design system. After that today we will discuss the new topic that is the hardware standalone system for the CAD system and the input and output devices. First we will discuss the benefits of the computer edit design system. So there are the different benefits which are very important with respect to computer edit design system. Always we can refer to computer edit design system for to create a 3D model of any mechanical component maybe to have the engineering analysis of any mechanical component. So we are not going towards the manual thing because there may be the chances of errors. So whenever we are using the assistance of the computers or maybe the use of the softwares for the 3D modeling or maybe the engineering analysis or maybe the machining of any component. So there will be the productivity improvement in the design. So also there will not be any wastage of the time between a 3D modeling or maybe the machining and maybe the engineering analysis. Also there will be the use of computer edit design, computer edit engineering for design and analysis respectively. As I am discussing that there will be the statement that whenever there will be the manual work will be there, yes there will be the mistakes or maybe the errors due to the manual work. But here in case of computer edit design there will be the assistance of the computers, there will be the use of the softwares. So that there will not be any errors during the design process. As we are using the same softwares maybe the 3D modeling software or maybe the engineering analysis software or the machining software in the company. So there will be the standardization process will be provided in the maybe the industry or maybe the firm or maybe the company. So always our computer edit design model or maybe the engineering analysis are more understandable in the process. For example, this more understandable point we will discuss in the next slide. So very easy to change, very easy for the modification. Suppose I want to review that particular 3D model, yes I can easily review, I can have the preview of the 3D model or the engineering analysis. In the design calculations, yes there is a greater accuracy and the preciseness due to the use of computer assistance. I can reuse we can called as a 3D model that is already developed and I can have the modification in that design. Very easier to read, very easier to we can called as understandable. Whenever I want to share the particular 3D model or engineering analysis model I can share very easily. There is one point which is very important that is more understandable. For example, I can take like there is a perspective drawing, there is a isometric drawing, if suppose there is an orthographic drawing, orthographic is a 2D sketch. But whenever I want the more understandable always we will prefer with maybe the isometric drawing or maybe the perspective drawing. And with respect to the types of maybe the geometrical modeling, yes there is a wire frame model, there is a surface modeling, there is a solid modeling. Always we are referring with the solid modeling. So that the inner surfaces or maybe the inner lines or the hidden lines, yes we can refer it with the with respect to the surface model or maybe the solid model. So whenever we are providing maybe the material, shading the colors and with the help of simulation again there will be the more and more understanding regarding the a 3D model and engineering analysis. So this is a particular picture regarding the more understanding in case of benefits of the computer edged design. Now we are discussing the particular point that is hardware standalone CAD system. Always there is a use of interactive computer graphics that is ICG in case of computer edged design system. So there are the 2 components that is design workstation and the output devices. The design workstation consists of the graphic terminal which is also called as cathode retube or the picture tube in general and which consists of the input devices. So design workstation consists of the graphic terminal and the input devices. There are the different output devices like the plotter, printer or maybe the secondary storage. Now with the help of diagram how to correlate the different components which are present in the hardware standalone system. Yes always there is a heart of the computer edged design system where we are actually the storing the particular 3D models. For example we are storing in the secondary storage like the heart is which is connected to the CPU and the CPU that is connected to the plotter or maybe the printer where we can have the output. The CPU is also connected to the graphic terminal or maybe the input device, different input devices and all over together these 2 things are called as design workstation. Graphic terminal so in front of you there is a image which is regarding the graphic terminal which is a part of computer edged design system. So graphic terminal in the other world which is called as cathode retube or the picture tube in general in our television sets there is a picture tube. So for example it consists of different components we will have the discussion regarding the graphic terminal which consists of the electron gun and whenever the cathode the emission of the cathode will be there from the electron gun and which will be passing through the beam focusing unit and the deflection system which will be passing through the beam focusing unit and the deflection system in the straight way. It is not moving in the scattered way with the help of deflection system and the beam focusing unit it is going in the linear direction. It is going into the linear direction and it is colliding with the particular a phosphor coating. The phosphor coating is provided on the CRT screen CRT screen is made up of a glass or this is also called as the CRT casing, cathode res casing and this is a screen on which we can have the visualization of the image drawing or maybe the 3D model of any mechanical component. So whenever there will be the bombardment of the electron beam on to the we can called as the particular screen with the help of phosphor coating there will be the glowing will be provided and there will be the visualization. For example this is a point of contact this is a point of contact where the electron beam is collided or it is bombarded on the screen. So at that point there will be the glowing will be provided this is a property of the phosphor that is a glowing as a property which is providing a lightning property for the we can called as on the screen. For example this is a particular second point of contact where with the help of deflection system the another ray of the electron which is deflected or which is collided on the particular screen this is a point of contact again there will be the glowing will be provided with respect to the phosphor coating. This is the phosphor coating this one this one is the phosphor coating so whenever the electron beam will be bombarded on the screen and with the help of phosphor coating there will be the glowing will be provided and we can visualize or the user can be visualize the maybe the image or maybe the we can called as the picture or maybe the 3D model yes the 3D model of any mechanical component after that. What are the different techniques of the graphic terminal there are we can called as the 2 techniques of the the graphic terminal first one is the stroke writing and second one is the raster scan. So the stroke writing is called as the line drawing the stroke writing is called as the line drawing you can see the diagram here yes it is called as the line drawing the raster scan is called as scan graphics the raster scan is called as scan graphics or maybe the digital TV. Now in the stroke writing suppose I am writing the with the help of pen just like I am just drawing the line yes there will be the drawing the line from one coordinate to the another coordinate from one coordinate to the another coordinate suppose this is my point number 1 this is the point number 2 3 4 5 6 this is the point number 6. So whenever I am connecting the different points whenever I am connecting the different points with respect to maybe the pen yes it will be act as a line drawing it will be act as a line drawing yes but here suppose I want to create a curves or maybe the as which is very difficult with respect to the stroke writing which is very difficult with respect to the stroke writing. Now there is another method which is called as raster scan always there will be the use of raster scan with the help of the graphic terminal. So suppose I want to create maybe a line or maybe the arc or maybe a circle yes there will be the use of raster scan so always the we can called as the electron beam is moving from one point to the another point from left to the right yes for the creation of the line or maybe the curves yes from the left to the right you can see and for the particular cycle it will be repeated and whenever a 3D model or maybe the curve or maybe the line or maybe the profile has created the cycle will be repeated. So there is one question for you what is the display device in CAD computer a design system think about this question. So the name of the display device in the computer a design system that is graphic terminal or maybe the cathode retube these are the references thank you.