WEBVTT 00:00:02.136 --> 00:00:04.066 A:middle >> This is the first lecture 00:00:04.066 --> 00:00:07.536 A:middle for engineering graphics, online section. 00:00:08.496 --> 00:00:13.216 A:middle Things you need to do for the first week are access, 00:00:13.216 --> 00:00:16.996 A:middle web access by going to this website here. 00:00:17.846 --> 00:00:21.146 A:middle If you have any questions about web access let me know. 00:00:21.956 --> 00:00:27.656 A:middle If you haven't had experience with it before. 00:00:27.806 --> 00:00:30.136 A:middle Web access will contain all the class materials 00:00:30.136 --> 00:00:33.936 A:middle for the whole semester so you need to check it regularly, 00:00:33.986 --> 00:00:35.926 A:middle at least twice a week. 00:00:35.926 --> 00:00:38.126 A:middle You need to review the syllabus carefully. 00:00:38.126 --> 00:00:40.816 A:middle We'll do a little bit of that in this lecture. 00:00:41.586 --> 00:00:44.546 A:middle You need to download, install AutoCAD on your computer 00:00:44.546 --> 00:00:48.356 A:middle because the first lab will require you to have AutoCAD. 00:00:48.596 --> 00:00:49.266 A:middle It's free. 00:00:50.946 --> 00:00:54.076 A:middle Lectures -- all lectures are prerecorded like this one. 00:00:55.556 --> 00:00:58.916 A:middle There will be two homework sets every week except 00:00:58.916 --> 00:01:00.276 A:middle for this week, there's only one. 00:01:00.926 --> 00:01:03.886 A:middle And homeworks will be Wednesdays and Sundays 00:01:03.966 --> 00:01:05.906 A:middle and they will be clearly indicated in web access. 00:01:05.906 --> 00:01:06.996 A:middle The same things for labs. 00:01:07.686 --> 00:01:09.806 A:middle Due every week except this week again, 00:01:10.186 --> 00:01:11.606 A:middle Wednesday and Sunday evenings. 00:01:12.046 --> 00:01:15.856 A:middle And there will be quizzes that will be announced way in advance 00:01:15.976 --> 00:01:17.996 A:middle and they will be done online. 00:01:18.346 --> 00:01:19.656 A:middle Also due on Wednesdays. 00:01:20.226 --> 00:01:23.066 A:middle However, we're going to have 3 tests and for the tests, 00:01:23.066 --> 00:01:24.286 A:middle those will not be online. 00:01:24.346 --> 00:01:27.546 A:middle You have to come to campus at Canada College. 00:01:27.656 --> 00:01:30.476 A:middle Let me know if you have problems doing that. 00:01:30.526 --> 00:01:33.246 A:middle Test schedules will be announced way in advance. 00:01:33.276 --> 00:01:35.516 A:middle And we will not have a final exam. 00:01:35.516 --> 00:01:37.446 A:middle Instead, we'll have a final project 00:01:38.266 --> 00:01:41.846 A:middle and presentations will be the Friday before the final 00:01:41.846 --> 00:01:42.856 A:middle exam week. 00:01:43.516 --> 00:01:48.876 A:middle [ Background sounds ] 00:01:49.376 --> 00:01:50.856 A:middle Let's look at our syllabus. 00:01:52.316 --> 00:01:54.426 A:middle This is is engineering graphics online. 00:01:54.426 --> 00:01:57.136 A:middle This is the first time I'm teaching this class online 00:01:57.506 --> 00:01:58.626 A:middle and I'm Dr. Enriquez. 00:01:58.936 --> 00:02:02.786 A:middle It's really easy to get a hold of me by e-mail. 00:02:04.776 --> 00:02:09.566 A:middle Okay. I have office hours from 4 to 6 in the STEM Center 00:02:09.746 --> 00:02:11.836 A:middle at Canada on Mondays and Wednesdays. 00:02:12.136 --> 00:02:14.726 A:middle And I also have online office hours on Sundays 7 00:02:14.726 --> 00:02:19.686 A:middle to 8 p.m. This is a 4 unit class. 00:02:19.896 --> 00:02:28.526 A:middle So expect to spend maybe about 8 hours on this class every week, 00:02:28.526 --> 00:02:30.576 A:middle at least depending on how good you are 00:02:31.526 --> 00:02:33.456 A:middle with learning new software. 00:02:33.846 --> 00:02:36.206 A:middle And here's the link for web access. 00:02:36.666 --> 00:02:43.006 A:middle It will contain all the course materials over the semester. 00:02:44.416 --> 00:02:47.116 A:middle Okay as I said, this is the first time offering this class. 00:02:47.116 --> 00:02:49.796 A:middle We expect some changes as we go along the way. 00:02:52.866 --> 00:02:58.456 A:middle Prerequisites for this class are either math 130 or math 222. 00:02:58.456 --> 00:03:00.006 A:middle So you basically need a little bit 00:03:00.006 --> 00:03:02.186 A:middle of trigonometry for this class. 00:03:03.026 --> 00:03:04.566 A:middle Here's our textbook. 00:03:05.576 --> 00:03:07.866 A:middle It's recommended but not required 00:03:07.866 --> 00:03:12.926 A:middle because I will post all the required course materials 00:03:12.926 --> 00:03:13.626 A:middle on web access. 00:03:14.716 --> 00:03:18.486 A:middle Learning outcomes for the class. 00:03:18.486 --> 00:03:22.836 A:middle What you're expected to learn from this class. 00:03:26.306 --> 00:03:29.746 A:middle As I said, lectures will be prerecorded weekly 00:03:29.976 --> 00:03:32.766 A:middle and it will be necessary for you 00:03:32.856 --> 00:03:37.736 A:middle to watch the prerecorded lectures in order to be able 00:03:37.816 --> 00:03:40.466 A:middle to do the homework for the week as well as the lab for the week. 00:03:41.196 --> 00:03:44.346 A:middle Quizzes will be announced way in advance. 00:03:44.796 --> 00:03:46.646 A:middle Okay? And it will be on Wednesdays. 00:03:47.996 --> 00:03:51.036 A:middle There will be 3 tests which will account for 40% 00:03:51.036 --> 00:03:53.766 A:middle of your semester grade and this test will be 00:03:54.216 --> 00:03:55.456 A:middle on campus at Canada. 00:03:55.816 --> 00:04:00.516 A:middle I will announce this way in advance. 00:04:00.816 --> 00:04:05.046 A:middle For you'll have the opportunity to earn up to a maximum 00:04:05.046 --> 00:04:10.946 A:middle of 15 bonus points by attending the weekly STEM Speaker Series 00:04:11.056 --> 00:04:17.296 A:middle starts on September 30th on Wednesdays from 5 to 6 p.m. 00:04:17.296 --> 00:04:19.166 A:middle And if you are unable to attend, 00:04:19.966 --> 00:04:22.176 A:middle you can still earn this bonus point 00:04:22.586 --> 00:04:27.446 A:middle by submitting two page reports on the speaker 00:04:27.596 --> 00:04:29.026 A:middle and the topic covered for the day. 00:04:29.456 --> 00:04:34.626 A:middle And a recording of this presentation will be posted 00:04:36.106 --> 00:04:37.846 A:middle later on for you to review. 00:04:38.046 --> 00:04:41.586 A:middle So in terms of bonus points, depending on the number 00:04:41.586 --> 00:04:44.566 A:middle of times you attend the STEM Speaker Series, you can -- 00:04:45.206 --> 00:04:46.696 A:middle first time you attend, you'll get 5. 00:04:46.696 --> 00:04:52.526 A:middle Second, 4 and then 3 and 3 up to a maximum of 15 bonus points. 00:04:52.876 --> 00:04:54.716 A:middle Here's the grade distribution. 00:04:55.276 --> 00:04:56.656 A:middle Thirty five percent on labs. 00:04:56.776 --> 00:04:58.776 A:middle Ten percent on homework and quizzes. 00:04:58.776 --> 00:05:01.706 A:middle Forty for tests and 15 for the final exam. 00:05:02.736 --> 00:05:07.516 A:middle And here's the tentative schedule for the whole semester 00:05:07.516 --> 00:05:10.646 A:middle and since it is the first time I'm offering this class online, 00:05:11.176 --> 00:05:13.706 A:middle it's to be expected that there will be changes 00:05:13.706 --> 00:05:14.586 A:middle as we go along the way. 00:05:15.166 --> 00:05:21.346 A:middle And make sure that you keep updated on web access. 00:05:21.516 --> 00:05:23.676 A:middle So this class is engineering graphics. 00:05:24.026 --> 00:05:26.076 A:middle And it's really a real and complete language. 00:05:26.286 --> 00:05:28.586 A:middle A lot of students think that graph -- 00:05:28.586 --> 00:05:29.826 A:middle engineering graphics is just 00:05:29.916 --> 00:05:31.356 A:middle about AutoCAD and how it all works. 00:05:31.836 --> 00:05:34.426 A:middle It's just about learning how to make drawings. 00:05:34.426 --> 00:05:35.456 A:middle It's more than that. 00:05:35.586 --> 00:05:36.706 A:middle It's a way of thinking. 00:05:37.176 --> 00:05:40.276 A:middle It's a way of communicating, solving problems, 00:05:40.346 --> 00:05:42.576 A:middle and also very important, 00:05:42.956 --> 00:05:45.576 A:middle visualizing objects quickly and accurately. 00:05:45.576 --> 00:05:49.126 A:middle Very, very important aspects of engineering. 00:05:49.786 --> 00:05:52.206 A:middle And as well as conducting analysis. 00:05:52.366 --> 00:05:55.566 A:middle In fact, in engineering 92% 00:05:55.566 --> 00:05:59.066 A:middle of the design process is based on graphics. 00:05:59.506 --> 00:06:02.136 A:middle And the other remaining 8% is between math. 00:06:02.936 --> 00:06:07.216 A:middle You know in the design process, design is the process 00:06:07.276 --> 00:06:10.216 A:middle of creating original solutions to some problems, 00:06:11.366 --> 00:06:13.896 A:middle 92% involves graphics. 00:06:15.486 --> 00:06:18.106 A:middle Engineers and engineers' major activities. 00:06:18.836 --> 00:06:22.136 A:middle Okay. Three D modeling and that kind 00:06:22.206 --> 00:06:24.016 A:middle of course, it depends on the industry and your actual job. 00:06:25.096 --> 00:06:30.166 A:middle So now since graphics involves communication, okay, 00:06:30.426 --> 00:06:34.026 A:middle in order to make that communication easy we have 00:06:34.356 --> 00:06:37.106 A:middle to adapt -- adopt some standards and conventions 00:06:37.826 --> 00:06:41.056 A:middle so that we understand each other as we communicate. 00:06:42.126 --> 00:06:45.116 A:middle Conventions are commonly accepted practices, rules, 00:06:45.116 --> 00:06:47.066 A:middle and methods used in technical drawing. 00:06:47.846 --> 00:06:51.306 A:middle On the other hand, standards are a little more rigid. 00:06:52.236 --> 00:06:54.186 A:middle They are a set of rules 00:06:55.196 --> 00:06:58.436 A:middle that govern how technical drawings are represented. 00:06:59.466 --> 00:07:01.496 A:middle It allows for clear communication 00:07:01.646 --> 00:07:03.846 A:middle of technical ideas. 00:07:03.846 --> 00:07:07.076 A:middle And for the U.S. these rules are set 00:07:07.116 --> 00:07:09.666 A:middle by the American National Standards Institute or ANSI. 00:07:11.006 --> 00:07:14.846 A:middle Other professional organizations such ASME 00:07:14.846 --> 00:07:21.116 A:middle or ASCE will have their own set of graphic standards. 00:07:22.176 --> 00:07:23.786 A:middle So in terms of communicating, 00:07:23.936 --> 00:07:26.806 A:middle let's start with some terminology 00:07:26.806 --> 00:07:30.606 A:middle on the different type of lines, or alphabet of lines. 00:07:30.606 --> 00:07:34.166 A:middle Center lines, okay, are lines that are used 00:07:34.236 --> 00:07:39.296 A:middle to represent symmetry and paths of motion. 00:07:40.166 --> 00:07:42.546 A:middle So they are used to mark centers of circles. 00:07:44.256 --> 00:07:49.506 A:middle So center lines are usually long short long short lines 00:07:50.196 --> 00:07:52.966 A:middle but they represent centers of symmetry 00:07:52.966 --> 00:07:55.956 A:middle such as cylinders and circles. 00:07:56.226 --> 00:07:59.636 A:middle Visible lines are object lines that are visible 00:07:59.676 --> 00:08:03.686 A:middle from your current view and they are usually solid and thick. 00:08:04.096 --> 00:08:07.596 A:middle Hidden lines are object lines that are currently visible 00:08:07.596 --> 00:08:10.616 A:middle from your current view because it's being blocked 00:08:10.686 --> 00:08:12.716 A:middle by some other features of the object. 00:08:13.506 --> 00:08:16.536 A:middle And dimension extension lines are used to indicate the sizes 00:08:16.536 --> 00:08:18.886 A:middle and locations of features in the drawing. 00:08:18.886 --> 00:08:22.916 A:middle Section lines are associated with objects that have a lot 00:08:22.916 --> 00:08:27.906 A:middle of internal features and we'll talk about all of these 00:08:27.906 --> 00:08:29.026 A:middle in more detail later on. 00:08:29.026 --> 00:08:33.206 A:middle Cutting plane lines are representing the position 00:08:33.206 --> 00:08:36.006 A:middle of the cutting plane. 00:08:36.266 --> 00:08:39.266 A:middle So here are the representation of the different types of lines. 00:08:40.096 --> 00:08:41.776 A:middle Center lines, long short long. 00:08:41.776 --> 00:08:44.916 A:middle Visible line is thick and solid. 00:08:45.676 --> 00:08:47.806 A:middle Short break lines and so on and so -- 00:08:47.806 --> 00:08:50.066 A:middle hidden lines are thin and dashed. 00:08:51.576 --> 00:08:53.726 A:middle Here's cutting plane line over here. 00:08:54.616 --> 00:08:58.136 A:middle Here's an illustration of how these lines are used. 00:08:58.576 --> 00:09:00.256 A:middle These different types of lines are used 00:09:00.256 --> 00:09:03.516 A:middle in an engineering drawing. 00:09:04.246 --> 00:09:06.616 A:middle So if the arrowhead for the dimension line, 00:09:06.676 --> 00:09:07.626 A:middle here's the dimension. 00:09:08.826 --> 00:09:12.656 A:middle Telling me how long that feature is and extension line 00:09:12.656 --> 00:09:17.446 A:middle or [inaudible] line points to specific locations in object. 00:09:17.666 --> 00:09:19.536 A:middle Here's a center line. 00:09:20.366 --> 00:09:23.906 A:middle In engineering, of course, we have the traditional tools. 00:09:24.766 --> 00:09:28.646 A:middle We still do a lot of sketching by hand. 00:09:28.646 --> 00:09:32.146 A:middle So we will need -- you will need pencils, 00:09:33.696 --> 00:09:35.406 A:middle regular pencil, mechanical pencil. 00:09:36.146 --> 00:09:38.586 A:middle You're going to need also compass for this class. 00:09:39.166 --> 00:09:40.896 A:middle Triangles would be very useful. 00:09:40.896 --> 00:09:42.936 A:middle You're going to need at least two. 00:09:44.296 --> 00:09:46.126 A:middle One that's 45, 45. 00:09:46.396 --> 00:09:47.966 A:middle Another that's 30 and 60. 00:09:47.966 --> 00:09:50.176 A:middle And the longer the bigger the triangles, 00:09:50.216 --> 00:09:51.796 A:middle the easier it will be for you. 00:09:52.266 --> 00:09:54.206 A:middle Don't buy the ones that are really, really tiny. 00:09:54.906 --> 00:09:59.096 A:middle Scales or there's engineering scales with a regular rule 00:09:59.096 --> 00:10:03.866 A:middle with one side in inches and millimeters and centimeters 00:10:03.866 --> 00:10:06.326 A:middle on the other side will be sufficient. 00:10:06.356 --> 00:10:08.986 A:middle We don't really need this anymore, protractors. 00:10:09.576 --> 00:10:13.326 A:middle Maybe. We don't templates. 00:10:13.696 --> 00:10:16.286 A:middle We're going to do them by hand, freehand. 00:10:17.186 --> 00:10:20.436 A:middle Here's an illustration of mechanical engineer's scale. 00:10:21.236 --> 00:10:25.836 A:middle So an inch is generally divided -- a mechanical engineer's, 00:10:26.296 --> 00:10:29.706 A:middle it's not divided into sixteenths. 00:10:30.656 --> 00:10:35.166 A:middle Most rulers it's one sixteenth like this one here. 00:10:35.166 --> 00:10:36.916 A:middle It's divided into sixteenths. 00:10:37.766 --> 00:10:40.996 A:middle So each tick mark here would correspond 00:10:41.056 --> 00:10:43.206 A:middle to one sixteenth of an inch. 00:10:43.286 --> 00:10:46.746 A:middle For the millimeter side, okay it's way easier 00:10:47.466 --> 00:10:50.666 A:middle because from here to here is 1 centimeter. 00:10:51.176 --> 00:10:53.606 A:middle Okay equals to 10 millimeters. 00:10:53.606 --> 00:10:56.616 A:middle I'm assuming that you know that from your previous math 00:10:56.616 --> 00:10:58.616 A:middle or maybe science courses. 00:10:59.496 --> 00:11:03.276 A:middle Here's an illustration of how to read those scales. 00:11:03.656 --> 00:11:06.026 A:middle Okay. This one is for inches. 00:11:06.026 --> 00:11:09.006 A:middle So it's divided into 16. 00:11:09.036 --> 00:11:12.816 A:middle Each inch is divided into 16 parts. 00:11:13.176 --> 00:11:18.416 A:middle So each tiny little space here corresponds to one sixteenth. 00:11:19.866 --> 00:11:21.026 A:middle Here's the one for metric. 00:11:21.336 --> 00:11:25.986 A:middle Some illustrations of 52.5 millimeters. 00:11:28.816 --> 00:11:31.976 A:middle Okay. In addition to the traditional tools of pencil 00:11:32.076 --> 00:11:34.676 A:middle and paper and scales, we're going to do a lot 00:11:35.146 --> 00:11:37.836 A:middle of computer-aided design. 00:11:37.986 --> 00:11:40.956 A:middle So in this class, we're going to using a CAD system 00:11:42.536 --> 00:11:46.176 A:middle which consists of the hardware, the computer, in combination 00:11:46.176 --> 00:11:48.056 A:middle with specific software. 00:11:49.446 --> 00:11:52.086 A:middle Okay. So the CAD system consists both 00:11:52.086 --> 00:11:54.206 A:middle of the hardware and the software. 00:11:54.206 --> 00:11:56.596 A:middle And for this class we're going 00:11:56.736 --> 00:11:59.596 A:middle to be using 2 software applications for CAD. 00:11:59.956 --> 00:12:04.926 A:middle Auto-CAD 2015 and SolidWorks 2015. 00:12:04.926 --> 00:12:07.216 A:middle And we're going to start for the first part of the course 00:12:07.276 --> 00:12:10.606 A:middle with AutoCAD and the last part would be SolidWorks. 00:12:10.606 --> 00:12:14.496 A:middle As part of your first homework, you're going 00:12:14.496 --> 00:12:16.566 A:middle to do freehand sketches. 00:12:16.566 --> 00:12:18.976 A:middle Okay? So we're going to talk about, a little bit 00:12:18.976 --> 00:12:22.086 A:middle about sketching which is the process 00:12:23.036 --> 00:12:27.296 A:middle of creating a rough preliminary drawing representing the 00:12:27.296 --> 00:12:28.446 A:middle main features. 00:12:29.036 --> 00:12:33.516 A:middle Common types of projections, so the problem with sketching 00:12:33.516 --> 00:12:35.876 A:middle if you're representing our 3 dimensional world 00:12:35.926 --> 00:12:41.236 A:middle in to a 2 dimensional space which the plane of your paper 00:12:41.696 --> 00:12:45.486 A:middle and in order to do that we need to apply a projection. 00:12:45.486 --> 00:12:49.136 A:middle It project through the object to the space of the paper 00:12:49.636 --> 00:12:52.846 A:middle and some common types of projections are multiview, 00:12:52.846 --> 00:12:54.746 A:middle axonometric, oblique, and perspective. 00:12:54.786 --> 00:12:58.786 A:middle We're going to talk about this in detail in week 3. 00:13:00.186 --> 00:13:02.556 A:middle Here is some illustration 00:13:02.586 --> 00:13:05.696 A:middle of the classification of typical sketches. 00:13:05.896 --> 00:13:11.486 A:middle Multiview is showing more than one view of the same object. 00:13:11.546 --> 00:13:12.876 A:middle It is called a top view. 00:13:13.186 --> 00:13:17.326 A:middle This one is the front view and this is the right side view. 00:13:17.326 --> 00:13:19.796 A:middle Okay. Axonometric, on the other hand, okay, 00:13:19.796 --> 00:13:22.116 A:middle you'll view the object at certain angles 00:13:22.116 --> 00:13:25.096 A:middle so that you see simultaneously the front top 00:13:25.096 --> 00:13:27.996 A:middle and the front spaces of your object. 00:13:28.116 --> 00:13:30.686 A:middle Oblique is another way 00:13:31.376 --> 00:13:35.796 A:middle of capturing the 3 primary surfaces. 00:13:36.146 --> 00:13:38.576 A:middle Perspective is also another one. 00:13:38.666 --> 00:13:41.996 A:middle We'll talk about all of this in detail later on. 00:13:42.926 --> 00:13:46.576 A:middle Sketching is very, very important in the design process. 00:13:46.576 --> 00:13:52.636 A:middle This is a schematic of the main steps 00:13:52.636 --> 00:13:54.956 A:middle or processes involved in designing. 00:13:55.666 --> 00:14:01.596 A:middle We have ideation which involves identifying the problem, 00:14:01.596 --> 00:14:04.866 A:middle generating preliminary ideas, and preliminary design. 00:14:05.886 --> 00:14:07.876 A:middle And then you have your refinement. 00:14:08.936 --> 00:14:13.386 A:middle We select a few or several of the preliminary ideas 00:14:13.486 --> 00:14:17.066 A:middle and you try to start analyzing them, okay? 00:14:17.556 --> 00:14:19.906 A:middle Then you have your implementation. 00:14:20.396 --> 00:14:22.666 A:middle We actually implement the design 00:14:22.666 --> 00:14:25.876 A:middle that you think would best solve the problem. 00:14:26.106 --> 00:14:29.026 A:middle All throughout the process, sketching is involved. 00:14:29.696 --> 00:14:31.816 A:middle So as engineers, we need to be able 00:14:31.896 --> 00:14:35.906 A:middle to quickly capture your ideas and put them on sketches. 00:14:37.986 --> 00:14:41.906 A:middle And the sketching process is an interactive process 00:14:41.906 --> 00:14:43.546 A:middle that involves seeing. 00:14:44.676 --> 00:14:46.746 A:middle Actually there's an image in your head 00:14:47.706 --> 00:14:49.806 A:middle that you try to represent, okay? 00:14:49.896 --> 00:14:52.526 A:middle So the process involves us seeing, 00:14:52.526 --> 00:14:54.616 A:middle imagining, and representing. 00:14:55.776 --> 00:15:02.596 A:middle There's -- so just like anything, sketching is a skill 00:15:03.146 --> 00:15:05.166 A:middle that can be developed by practice. 00:15:05.166 --> 00:15:06.826 A:middle And there are some techniques 00:15:06.956 --> 00:15:10.256 A:middle that you can practice to do that. 00:15:10.676 --> 00:15:13.496 A:middle First is contour sketching when you focus 00:15:13.496 --> 00:15:15.526 A:middle on sketching the outline of the object. 00:15:16.496 --> 00:15:20.156 A:middle The contours are the edges of the object, lines separating, 00:15:20.156 --> 00:15:23.826 A:middle contrasting light or color, changes in surfaces, 00:15:23.826 --> 00:15:25.046 A:middle and overlapping parts. 00:15:25.976 --> 00:15:30.436 A:middle And the idea is you focus on the object that you are trying 00:15:30.436 --> 00:15:34.276 A:middle to sketch and you move your pencil across the paper 00:15:34.956 --> 00:15:39.126 A:middle as your eye scans the outline of the object. 00:15:39.126 --> 00:15:43.566 A:middle So imagine your eyes following the outline of the object 00:15:43.566 --> 00:15:45.806 A:middle and as your eyes are moving, your sketch, 00:15:46.296 --> 00:15:48.776 A:middle your pencil is following the motion of your eyes 00:15:49.526 --> 00:15:53.176 A:middle around the outline of the object. 00:15:53.626 --> 00:15:56.506 A:middle Another technique is negative space sketching. 00:15:57.026 --> 00:15:58.496 A:middle When you focus on the space that's 00:15:58.496 --> 00:15:59.546 A:middle between the objects rather 00:15:59.546 --> 00:16:01.296 A:middle than the object themselves. I will illustrate that. 00:16:02.206 --> 00:16:04.826 A:middle And third one is upside down sketching 00:16:05.286 --> 00:16:11.906 A:middle where in you catch an object not its normal position but upside 00:16:11.986 --> 00:16:17.476 A:middle down so that you can focus on the shape and the forms 00:16:17.476 --> 00:16:19.626 A:middle of the object rather than your idea of what 00:16:19.626 --> 00:16:20.546 A:middle that object should be. 00:16:21.926 --> 00:16:25.136 A:middle Okay. So here's an example of contour sketching. 00:16:25.816 --> 00:16:30.546 A:middle It is a stapler, okay and all you do is you -- 00:16:30.946 --> 00:16:35.436 A:middle this contour right here of the stapler is generated 00:16:36.166 --> 00:16:38.646 A:middle by what using your eyes 00:16:38.646 --> 00:16:42.856 A:middle and following the contours of this picture. 00:16:42.856 --> 00:16:46.146 A:middle And as your eyes are moving, your pencil sort 00:16:46.146 --> 00:16:47.656 A:middle of follows the movement of the eye. 00:16:49.106 --> 00:16:51.626 A:middle You focus on the object rather than on the paper. 00:16:51.626 --> 00:16:53.866 A:middle Here's an example of negative space sketching. 00:16:54.656 --> 00:17:00.316 A:middle Okay? So you focus on the space rather than on the objects. 00:17:00.756 --> 00:17:03.186 A:middle Lettering standards, okay and also part 00:17:03.266 --> 00:17:05.376 A:middle of communication would be words. 00:17:06.166 --> 00:17:08.316 A:middle So we try to make -- we're engineers. 00:17:08.316 --> 00:17:11.836 A:middle So we start to make our letters as simple as possible. 00:17:11.836 --> 00:17:17.046 A:middle So we use Gothic style, commonly vertical sometimes also inclined 00:17:17.536 --> 00:17:20.276 A:middle and we always use capital letters, okay? 00:17:20.276 --> 00:17:23.666 A:middle With a minimum height for the text. 00:17:24.086 --> 00:17:27.846 A:middle Here's how you would create vertical Gothic letters just 00:17:27.846 --> 00:17:29.826 A:middle following the pen strokes. 00:17:31.006 --> 00:17:33.216 A:middle So from now on whenever you're turning 00:17:33.636 --> 00:17:38.456 A:middle in any work that's generated with pencil and paper, 00:17:38.586 --> 00:17:40.016 A:middle whenever you turn it, I want you 00:17:40.336 --> 00:17:45.816 A:middle to start practicing vertical Gothic letters 00:17:46.406 --> 00:17:47.326 A:middle when you write your name. 00:17:48.156 --> 00:17:50.706 A:middle Okay. An illustration of how you can use -- down here. 00:17:51.376 --> 00:17:55.416 A:middle Okay? How can you like vertical lines in orders to make sure 00:17:55.496 --> 00:17:59.566 A:middle that your lines or letters stay in vertical. 00:17:59.786 --> 00:18:04.126 A:middle Some uses of text on drawings will be for title blocks, 00:18:05.036 --> 00:18:07.706 A:middle revision block, bill of materials, and some -- 00:18:07.976 --> 00:18:11.276 A:middle any general notes that will be helpful 00:18:12.096 --> 00:18:14.886 A:middle in conveying additional ideas about your drawing. 00:18:15.016 --> 00:18:16.136 A:middle Here's an example here. 00:18:17.026 --> 00:18:18.366 A:middle Here's the revision block. 00:18:19.576 --> 00:18:20.806 A:middle Revised it and when. 00:18:21.456 --> 00:18:24.956 A:middle Here's the parts list or what they call bill of materials. 00:18:24.956 --> 00:18:25.696 A:middle The title block. 00:18:27.136 --> 00:18:28.936 A:middle Okay and some general notes also. 00:18:29.946 --> 00:18:32.656 A:middle Note this in all of these, we use, try to use 00:18:32.816 --> 00:18:33.336 A:middle vertical Gothic letters. 00:18:34.766 --> 00:18:38.636 A:middle Now fortunately for us, we now have computers 00:18:38.926 --> 00:18:42.686 A:middle and free sophisticated software that we can use 00:18:42.686 --> 00:18:45.446 A:middle to generate engineering drawings. 00:18:45.836 --> 00:18:49.186 A:middle So we're going to start AutoCAD. 00:18:49.496 --> 00:18:52.896 A:middle We'll give you a short tour of AutoCAD. 00:18:54.346 --> 00:18:56.606 A:middle It has some of the general features 00:18:56.606 --> 00:19:00.106 A:middle of a standard windows program. 00:19:01.316 --> 00:19:04.456 A:middle And we'll take a tour of AutoCAD. 00:19:06.096 --> 00:19:07.226 A:middle Command window. 00:19:07.226 --> 00:19:09.576 A:middle It's very, very important because this is your way 00:19:09.576 --> 00:19:15.176 A:middle of communicating to and AutoCAD communicating back to you. 00:19:15.176 --> 00:19:18.416 A:middle Always pay attention what AutoCAD wants you to do. 00:19:18.416 --> 00:19:21.076 A:middle Most of the time there's more than one way 00:19:21.076 --> 00:19:25.316 A:middle of starting a command. 00:19:25.316 --> 00:19:28.146 A:middle You can either use a menu or toolbar. 00:19:28.696 --> 00:19:31.966 A:middle Okay? And sometimes you can also do shortcuts. 00:19:32.926 --> 00:19:33.876 A:middle Escape when you're stuck. 00:19:34.626 --> 00:19:39.176 A:middle Just always either press escape, okay, 00:19:39.266 --> 00:19:43.446 A:middle or you can also do an online help. 00:19:43.726 --> 00:19:45.526 A:middle Let's do a quick tour of AutoCAD. 00:19:47.786 --> 00:19:50.636 A:middle And AutoCAD window here. 00:19:50.776 --> 00:19:54.516 A:middle Okay so this is the title bar indicating the name 00:19:54.516 --> 00:19:55.146 A:middle of the program. 00:19:55.416 --> 00:19:59.586 A:middle So right now I have the -- okay so let's start a new drawing. 00:20:01.546 --> 00:20:07.916 A:middle Okay new. And let's just say we open say new template imperial. 00:20:07.916 --> 00:20:10.796 A:middle Imperial means that your units will be in inches. 00:20:11.766 --> 00:20:16.286 A:middle Okay? By default this menu bars up here. 00:20:16.996 --> 00:20:20.366 A:middle Okay pull down menus are probably not available. 00:20:20.416 --> 00:20:21.786 A:middle So let me turn that on. 00:20:23.066 --> 00:20:24.026 A:middle Turn hide menu. 00:20:24.286 --> 00:20:26.196 A:middle So when you first open your AutoCAD, 00:20:26.196 --> 00:20:28.586 A:middle it'll probably look like this. 00:20:29.046 --> 00:20:35.066 A:middle And you have here your home and the commands, okay. 00:20:35.886 --> 00:20:40.066 A:middle Or grouped, you see these are the drawing commands, 00:20:41.116 --> 00:20:44.716 A:middle creating lines, polylines, circles and so on. 00:20:44.716 --> 00:20:46.656 A:middle Okay and these are the modify commands. 00:20:47.426 --> 00:20:48.616 A:middle Annotation commands. 00:20:49.646 --> 00:20:52.386 A:middle Layers. Okay, we'll talk about those layers. 00:20:52.526 --> 00:20:53.126 A:middle Properties. 00:20:54.276 --> 00:20:58.486 A:middle Commands and some utilities for measuring angles and areas 00:20:58.486 --> 00:20:59.496 A:middle and so on and so forth. 00:21:00.006 --> 00:21:04.236 A:middle Okay? This is your main drawing area here. 00:21:04.636 --> 00:21:07.486 A:middle Okay? And this is your command line here. 00:21:07.616 --> 00:21:11.006 A:middle This is the one that will -- you can either type command, 00:21:11.076 --> 00:21:13.466 A:middle however, this command line is 00:21:13.836 --> 00:21:16.676 A:middle where AutoCAD will communicate back to you 00:21:16.676 --> 00:21:18.046 A:middle when it wants you to do something. 00:21:18.466 --> 00:21:21.076 A:middle So, for instance, if I say I want to create a circle. 00:21:22.176 --> 00:21:23.136 A:middle Click on the circle. 00:21:23.666 --> 00:21:27.586 A:middle Okay? And then here's what AutoCAD says. 00:21:27.746 --> 00:21:30.916 A:middle It says please specify the center point of the circle. 00:21:31.596 --> 00:21:32.796 A:middle So when you're creating a circle, 00:21:32.796 --> 00:21:35.666 A:middle one way to create a circle is to first specify the center. 00:21:36.086 --> 00:21:37.296 A:middle How do you specify the center? 00:21:37.296 --> 00:21:42.096 A:middle You can either click here for the location of the center 00:21:42.096 --> 00:21:45.396 A:middle of the circle or you can type the coordinates here 00:21:45.676 --> 00:21:48.516 A:middle in the command line. 00:21:48.706 --> 00:21:52.446 A:middle You can say zero zero zero means x is equal to zero, y is equzl to zero, or just click. 00:21:53.406 --> 00:21:58.016 A:middle And then when I click, AutoCAD down here asks me again. 00:21:58.056 --> 00:22:02.686 A:middle Now you've told me what the center is, what is the radius? 00:22:02.856 --> 00:22:05.586 A:middle Now you have to type the radius of the circle. 00:22:06.616 --> 00:22:08.156 A:middle Let's say 3. 00:22:09.116 --> 00:22:09.866 A:middle Then it is created. 00:22:11.026 --> 00:22:12.286 A:middle Okay? So it's very important 00:22:12.286 --> 00:22:14.826 A:middle to always pay attention to this command line. 00:22:14.826 --> 00:22:20.506 A:middle By the way, if I accidentally lost their command line, 00:22:20.506 --> 00:22:24.086 A:middle I believe you can go recover by doing control 9. 00:22:24.656 --> 00:22:32.666 A:middle Control 9 will turn on and off your command line. 00:22:33.056 --> 00:22:35.096 A:middle Down here would be your status bar. 00:22:35.426 --> 00:22:39.076 A:middle This here, indications of your the current location 00:22:39.076 --> 00:22:44.026 A:middle of your coordinates of your cursor. 00:22:44.026 --> 00:22:47.966 A:middle So this x, y is something called a user coordinate system. 00:22:48.696 --> 00:22:52.206 A:middle Okay defines the x and y direction. 00:22:52.796 --> 00:22:53.606 A:middle And your origin. 00:22:54.106 --> 00:22:58.076 A:middle These are the x coordinate, y coordinate and z coordinate. 00:22:58.246 --> 00:23:00.886 A:middle Right now we're [inaudible] so the z coordinate is always 0. 00:23:01.426 --> 00:23:04.386 A:middle Okay? And these things are very important. 00:23:05.036 --> 00:23:08.186 A:middle Okay these are drafting utilities. 00:23:08.186 --> 00:23:13.686 A:middle So this one here is your display grid on and off. 00:23:13.686 --> 00:23:16.176 A:middle So if I click on that it becomes on. 00:23:16.556 --> 00:23:16.846 A:middle It's a toggle, off. 00:23:17.726 --> 00:23:22.296 A:middle So here's now -- similar -- so here's the grid on and off. 00:23:22.586 --> 00:23:24.056 A:middle Here's the snap on and off. 00:23:24.056 --> 00:23:25.366 A:middle Now let's see what the difference is 00:23:25.366 --> 00:23:28.426 A:middle between the snap being on and off. 00:23:28.816 --> 00:23:32.596 A:middle When it's on, when I'm trying to locate points, 00:23:32.936 --> 00:23:34.606 A:middle if you notice look at the -- 00:23:35.116 --> 00:23:40.166 A:middle if you look at the coordinates here, okay. 00:23:41.996 --> 00:23:45.266 A:middle They only change by .5 because it only snaps 00:23:45.266 --> 00:23:48.146 A:middle from 1 grid line to another. 00:23:49.526 --> 00:23:50.266 A:middle Okay? That's what it means by snap. 00:23:50.336 --> 00:23:55.316 A:middle Now if turn the snap off here, notice that this coordinates, 00:23:55.586 --> 00:23:57.116 A:middle you know, vary continously. 00:23:57.116 --> 00:24:00.116 A:middle It doesn't go just from .5 to 0. 00:24:00.346 --> 00:24:04.486 A:middle Okay? So if it's on, it just jumps along the gridlines. 00:24:04.576 --> 00:24:10.916 A:middle Now the spacing can be changed by doing snap setting. 00:24:12.016 --> 00:24:14.796 A:middle Okay? Right now it's .5. 00:24:15.096 --> 00:24:17.376 A:middle It's on. You can also change the grid setting. 00:24:17.376 --> 00:24:18.966 A:middle It's on. Right now .5. 00:24:20.076 --> 00:24:22.666 A:middle Okay. So those are your drafting aids 00:24:22.666 --> 00:24:24.686 A:middle that help you more quickly locate points 00:24:25.556 --> 00:24:27.446 A:middle on your drawing area. 00:24:29.056 --> 00:24:30.636 A:middle Other things here are -- 00:24:30.636 --> 00:24:34.966 A:middle this one is also very useful or orthogonal. 00:24:35.586 --> 00:24:37.836 A:middle It just is on when I'm creating lines. 00:24:38.876 --> 00:24:42.776 A:middle My lines can only go perfectly either horizontally 00:24:43.036 --> 00:24:43.616 A:middle or vertically. 00:24:44.816 --> 00:24:47.016 A:middle Even if my cursor location is slightly off, 00:24:47.776 --> 00:24:49.506 A:middle it's perfectly vertical 00:24:49.546 --> 00:24:55.066 A:middle or perfectly horizontal because of orhto. 00:24:55.786 --> 00:24:56.656 A:middle This is called ortho. 00:24:57.356 --> 00:25:01.286 A:middle Another very important drafting aid is, 00:25:01.526 --> 00:25:03.666 A:middle let's turn -- this one here. 00:25:04.086 --> 00:25:07.956 A:middle This snap very important. 00:25:08.096 --> 00:25:13.376 A:middle It's snap to specific locations and if either right mouse click 00:25:13.376 --> 00:25:15.156 A:middle on it, okay an object's snap. 00:25:15.406 --> 00:25:17.986 A:middle Okay this is the different settings. 00:25:18.556 --> 00:25:21.786 A:middle You can go to end points exactly on the end points 00:25:22.086 --> 00:25:26.786 A:middle or center a midpoint quadrant interception of objects 00:25:26.826 --> 00:25:30.106 A:middle that are already on the screen. 00:25:30.106 --> 00:25:32.976 A:middle So, for instance, never rely on your eyeball. 00:25:33.166 --> 00:25:35.856 A:middle Okay? So for instance, if this is up and I want 00:25:36.336 --> 00:25:38.766 A:middle to make a line starting from the center of the line 00:25:38.806 --> 00:25:42.636 A:middle or the circle, okay and going to the end of this line, 00:25:42.716 --> 00:25:46.376 A:middle I can approximately do that by -- I'm relying on my eyes. 00:25:46.486 --> 00:25:49.196 A:middle Now I'm on the end but it's probably not perfect 00:25:49.266 --> 00:25:53.216 A:middle and it's very dangerous because it looks almost square 00:25:53.216 --> 00:25:53.936 A:middle but it's really not. 00:25:54.516 --> 00:25:59.896 A:middle On the other hand, if I turn on the snap, I can create a line 00:26:00.356 --> 00:26:03.326 A:middle that is perfectly at the center. 00:26:03.796 --> 00:26:07.516 A:middle So when you see the circle, green circle symbol 00:26:07.516 --> 00:26:09.206 A:middle that means I'm exactly at the center. 00:26:09.206 --> 00:26:11.026 A:middle Even though my cursor's slightly off. 00:26:11.126 --> 00:26:14.096 A:middle I'm actually exactly the center of the circle 00:26:14.096 --> 00:26:16.256 A:middle and similarly here, okay, 00:26:16.786 --> 00:26:20.066 A:middle I can go to the exact end point of the line. 00:26:21.496 --> 00:26:24.746 A:middle Okay? So if you look at the difference between the two. 00:26:26.166 --> 00:26:29.816 A:middle One of them is -- oh by the way, to zoom in 00:26:29.816 --> 00:26:33.116 A:middle and out I'm just using my scroll on my mouse. 00:26:34.416 --> 00:26:37.936 A:middle So it's clearly one of them is perfectly 00:26:37.936 --> 00:26:41.036 A:middle at the center of the circle. 00:26:41.036 --> 00:26:41.646 A:middle [Inaudible]. 00:26:41.646 --> 00:26:44.046 A:middle I think I'm going to stop here. 00:26:44.736 --> 00:26:50.456 A:middle What I want you to do next is watch the video on lab 1. 00:26:50.966 --> 00:26:54.086 A:middle That will be very helpful for you to do your lab number 1.