 Hello everyone, myself Professor Prithish Chittay, working in mechanical engineering department as an assistant professor in Vulture Institute of Technology, Solopur. So, today we will discuss the second part of data exchange format, which is a part of the course CADCAM CAE. Now, what you are learning? So, the students will be able to apply the CAD fundamentals like the data exchange format, which is a part of geometrical transformation and also we can analyze the application of geometrical modeling. Yes, whenever we are providing the geometrical modeling from one software to the another software, there is a use of data exchange format. So, what we are learning in this session? First of all, we will see what we are learning in the last session. After that, there are the two types of data exchange format that we have to discuss that is DXF and the DMIS, dimensional measurement interface specification and drawing exchange format. As we have discussed like the data exchange format, there are the three types, initial graphic exchange specification, drawing exchange format and dimensional measurement interface specification. So, first of all, we will discuss the initial graphic exchange specification. In the last session also, we have discussed this point. So, very, very fastly, we will discuss this data exchange format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . specification we will discuss. So, to transfer the entire product definition as we have discussed regarding the design and the manufacturing. There are the different types of sections like there is a start section, there is a parameter section, there is a directory entry, there is a global section, there is a terminal section. Always I will remember like SPDGT, always I will remember the sections regarding the IGES SPDGT. Yes, that is why I highlighted the initial letters of the initial graphic exchange specification files of the sections. So, what it consists of? What the start section consists of? So, it consists of the it will provide the readable file for the post processing. The post processing means like we can create the meshing, we can create the analysis and so that we can have the output regarding the hyper mesh or maybe the ANSI software. So, readable file means with the help of dot IGES that particular file will be entering it to the another software. Yes, and that file will be open from one software to the another software. That is why that is called as the readable file and which is possible with the help of IGES parameter entry. So, parameter entry like which consists of the different types of graphical entities or the dimensional types. Suppose we have created some of the geometrical entities and we want to import those. So, whenever we are importing those geometrical entities files, yes it will open with same geometrical entities. If suppose you have created maybe the triangle or maybe the rectangle, yes it will be appear as a triangle or maybe the rectangle in the another model also in the another software also. Direct entry that is called as rendering properties like suppose you want to provide the shades or the colors or maybe suppose you want to fill the area, you want to provide the material, yes these rendering properties you can provide it with the help of direct entry. Global section, yes global section like in the in my thinking like it is also called as the content which is the part of bill of material or maybe which is the part of the part list or maybe the name plate which consists of the details regarding the product. In the computer added drafting sheet always it consists of maybe the details regarding the product, the name of the product, who developed the product, which company developed the product, the name of the company, the date of the drawing, date of the drawing means the start of the drawing and the end of the drawing which is very important. The concepts regarding the geometrical dimensions and the tolerances, terminate section, the export choices in which so as per the convenience will be edited when the file will be transferred into the another software. So the export choices are very much important in the IGS file, suppose you want to provide maybe the catea file into the solid words file, the catea file into the machine file or catea file into the analysis software, yes in with the help of terminate section which will be very important and the data will be transferred from one software to the another software 100 percent. Now before starting the next concept there is one question in front of you what is the use of DXF, you can think about this, yes DXF that is not the data exchange format actually, DXF is the drawing exchange format. So whenever you want to import the 2D model like you can create the 2D model in the Atocad or maybe the Cadian software and you want to import those for example the Atocad file into maybe the catea software or maybe the solid words software, yes with the help of DXF we can import those files. So we will discuss the drawing exchange format that is a DXF. So to transfer the 2D sketches in the graphic software, there are the different types of sections that is in front of you, there is a header section, in the header section you can provide the header section which is equivalent to global section in the IGS. You can see the details regarding the header section which is the part of DXF for example we have discussed for example maybe the global section in case of maybe the IGS and the parameters or the or we can call as the properties which are present in the global section which are in the IGS which is similar in the header section which is similar in the header section of the drawing exchange format. So what it consists of like the details regarding the product or whether who generated the product, who generated the design which is the company, the date of the drawing or the details regarding the drafting after that. The class section like the block entity or the object like the geometrical entities, the table section, the layer by layer section. Suppose you want to create maybe a single line or maybe the multi line, you want to create the arc, the text style or maybe for example the text style means the times neuroman, aerial or book neuroman, these are the text style, the coordinate system. Suppose you want maybe the x, y, z coordinate or maybe the x, y coordinates or maybe the x, z coordinate, the dimension style. In the autogad you can provide the different styles regarding the dimensions. There is a block section like you can provide the symbols for the geometrical entities. For example suppose you want to provide the diameter, so how you will provide the diameter in the 3D model like a phi maybe a 30 like with the help of this you can provide for the dimensions regarding the geometrical entity. Suppose you are having maybe a circle and you want to provide a dimension for the circle. So in this case how you can provide the symbol or maybe symbol for the we can call it as the dimensions. Like this you can provide the we can call it as the dimension or maybe the diameter yes after that. Entity section like the geometrical entities, object section the symbol for the non geometrical entities like yes there are different types of non geometrical entities operations like the trim or maybe the mirror, translation rotation scaling, these are the geometrical transformation, project 3D element these all these contents will be provided in the object section. Now the very important concept regarding the data exchange format which is called as dimensional measurement and interface specification. Now you can see here there is one very important word in the dimensional measurement interface specification that is called as measurement. I have highlighted one word which is called as measurement means suppose you want to measure the particular dimension yes this particular data exchange format with respect to the automation components like maybe the CMM coordinate measuring machine or maybe the machine vision yes there is one concept or the one component that is in front of you I have highlighted that particular component that is CMM that is called as coordinate measuring machine yes which is connected to the CAD system. Now for example you have created the CAD model with the help of CAD software in the CAD system after that that CAD model that will be provided to the computer aided manufacturing system or the components like the CNC system that is computer numerical control system in which in which you can provide the metal removal process sequence of cutting operation yes this is the work piece this is the table this is the cutting tool this is the spindle this is the column. Now after the creation of the or after the manufacturing the product the product will be provided to the CMM that is coordinate measuring machine. Now this is the probe this is called as probe and this is the work piece this is the work piece where the dimensions can be measured. So whenever the probe will touch to the work piece the dimensions will be measured in the computer system. So automatic measuring of the dimensions will be provided with the help of coordinate measuring machine. So this is the use of dimensional measurement interface specification these are the references thank you.