[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.20,0:00:02.20,Default,,0000,0000,0000,,As you work to develop CAD fluency,
Dialogue: 0,0:00:02.28,0:00:05.55,Default,,0000,0000,0000,,which means to be able to do your CAD work quickly and accurately,
Dialogue: 0,0:00:05.80,0:00:08.95,Default,,0000,0000,0000,,it helps to have a good CAD process.
Dialogue: 0,0:00:09.21,0:00:13.19,Default,,0000,0000,0000,,Now, a good CAD process always starts with understanding
Dialogue: 0,0:00:13.47,0:00:15.23,Default,,0000,0000,0000,,the purpose for the CAD work.
Dialogue: 0,0:00:15.40,0:00:15.92,Default,,0000,0000,0000,,In other words,
Dialogue: 0,0:00:16.35,0:00:18.31,Default,,0000,0000,0000,,understanding the job that needs to be done.
Dialogue: 0,0:00:18.60,0:00:20.35,Default,,0000,0000,0000,,Now in the product development process,
Dialogue: 0,0:00:20.64,0:00:24.20,Default,,0000,0000,0000,,we have a variety of ways that we understand the job that needs to be done.
Dialogue: 0,0:00:24.32,0:00:24.75,Default,,0000,0000,0000,,For example,
Dialogue: 0,0:00:24.80,0:00:25.20,Default,,0000,0000,0000,,we might
Dialogue: 0,0:00:25.65,0:00:25.85,Default,,0000,0000,0000,,read 
Dialogue: 0,0:00:25.89,0:00:30.32,Default,,0000,0000,0000,,a design brief or have a discussion with a client or anything like that.
Dialogue: 0,0:00:30.69,0:00:36.53,Default,,0000,0000,0000,,But in the process of learning CAD and being given exercises and
Dialogue: 0,0:00:36.85,0:00:39.32,Default,,0000,0000,0000,,activities the way we're doing in this course,
Dialogue: 0,0:00:39.73,0:00:43.50,Default,,0000,0000,0000,,one of the important ways for you to understand the job that needs to be done
Dialogue: 0,0:00:43.89,0:00:44.44,Default,,0000,0000,0000,,is
Dialogue: 0,0:00:44.69,0:00:46.28,Default,,0000,0000,0000,,to be able to read
Dialogue: 0,0:00:46.57,0:00:49.53,Default,,0000,0000,0000,,and interpret correctly an engineering drawing.
Dialogue: 0,0:00:50.15,0:00:50.95,Default,,0000,0000,0000,,Usually,
Dialogue: 0,0:00:51.27,0:00:54.62,Default,,0000,0000,0000,,in this course, for the purpose of reproducing the geometry
Dialogue: 0,0:00:55.03,0:00:55.54,Default,,0000,0000,0000,,found
Dialogue: 0,0:00:55.79,0:00:57.46,Default,,0000,0000,0000,,in those engineering drawings.
Dialogue: 0,0:00:57.59,0:00:58.66,Default,,0000,0000,0000,,So, in this video,
Dialogue: 0,0:00:58.91,0:01:02.78,Default,,0000,0000,0000,,I'll take the time to describe to you part drawings
Dialogue: 0,0:01:03.06,0:01:04.43,Default,,0000,0000,0000,,and assembly drawings.
Dialogue: 0,0:01:04.53,0:01:05.80,Default,,0000,0000,0000,,And I will simply
Dialogue: 0,0:01:06.35,0:01:06.85,Default,,0000,0000,0000,,attempt
Dialogue: 0,0:01:07.11,0:01:10.34,Default,,0000,0000,0000,,to demystify what otherwise may appear
Dialogue: 0,0:01:10.67,0:01:13.02,Default,,0000,0000,0000,,like a complicated set of documents.
Dialogue: 0,0:01:13.11,0:01:16.11,Default,,0000,0000,0000,,But as soon as you sort of break them down and see what's in them,
Dialogue: 0,0:01:16.47,0:01:21.54,Default,,0000,0000,0000,,you'll be able to begin the process of reading and interpreting them correctly.
Dialogue: 0,0:01:21.75,0:01:24.35,Default,,0000,0000,0000,,So, I'm gonna jump right now into a set of graphics.
Dialogue: 0,0:01:24.43,0:01:27.27,Default,,0000,0000,0000,,We're gonna take a look at these graphics now, and we can see
Dialogue: 0,0:01:28.41,0:01:29.31,Default,,0000,0000,0000,,there is a product here.
Dialogue: 0,0:01:29.37,0:01:30.76,Default,,0000,0000,0000,,It is a turbocharger.
Dialogue: 0,0:01:31.09,0:01:33.75,Default,,0000,0000,0000,,This particular turbocharger for the discussion
Dialogue: 0,0:01:34.01,0:01:38.06,Default,,0000,0000,0000,,that we're gonna have right now has two pages
Dialogue: 0,0:01:38.29,0:01:39.00,Default,,0000,0000,0000,,of a drawing.
Dialogue: 0,0:01:39.17,0:01:40.96,Default,,0000,0000,0000,,So, the drawing is shown right here.
Dialogue: 0,0:01:41.17,0:01:42.80,Default,,0000,0000,0000,,We're gonna look at sheet 1
Dialogue: 0,0:01:43.09,0:01:44.32,Default,,0000,0000,0000,,of this drawing set,
Dialogue: 0,0:01:44.57,0:01:45.94,Default,,0000,0000,0000,,and we're just gonna start
Dialogue: 0,0:01:46.33,0:01:48.44,Default,,0000,0000,0000,,breaking down its pieces,
Dialogue: 0,0:01:48.81,0:01:51.21,Default,,0000,0000,0000,,and then we'll look at sheet 2, and then we're gonna
Dialogue: 0,0:01:51.21,0:01:54.61,Default,,0000,0000,0000,,spend a little bit of time looking at an assembly drawing.
Dialogue: 0,0:01:55.34,0:01:55.35,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:01:56.29,0:01:57.32,Default,,0000,0000,0000,,For sheet 1,
Dialogue: 0,0:01:57.77,0:02:01.81,Default,,0000,0000,0000,,we need to understand that the overall graphic that's
Dialogue: 0,0:02:01.81,0:02:04.12,Default,,0000,0000,0000,,around the edge is called the sheet format.
Dialogue: 0,0:02:04.33,0:02:04.68,Default,,0000,0000,0000,,In fact,
Dialogue: 0,0:02:04.73,0:02:05.18,Default,,0000,0000,0000,,we can
Dialogue: 0,0:02:05.37,0:02:08.44,Default,,0000,0000,0000,,just sort of take out all the geometry and specific
Dialogue: 0,0:02:08.81,0:02:12.81,Default,,0000,0000,0000,,geometric information and what's left is called the sheet format.
Dialogue: 0,0:02:13.47,0:02:14.06,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:02:14.19,0:02:16.42,Default,,0000,0000,0000,,The sheet format has zone markers.
Dialogue: 0,0:02:16.63,0:02:20.26,Default,,0000,0000,0000,,These zone markers are used for to facilitate communication
Dialogue: 0,0:02:20.55,0:02:24.22,Default,,0000,0000,0000,,on design teams or across a large geographic distances.
Dialogue: 0,0:02:24.23,0:02:24.74,Default,,0000,0000,0000,,We can say,
Dialogue: 0,0:02:24.75,0:02:25.04,Default,,0000,0000,0000,,hey,
Dialogue: 0,0:02:25.31,0:02:29.07,Default,,0000,0000,0000,,something's going on in C2, area C2, of the drawing.
Dialogue: 0,0:02:29.11,0:02:30.94,Default,,0000,0000,0000,,Let's take a look and see what that is.
Dialogue: 0,0:02:32.47,0:02:34.26,Default,,0000,0000,0000,,Also, in 
Dialogue: 0,0:02:34.62,0:02:35.31,Default,,0000,0000,0000,,the
Dialogue: 0,0:02:35.63,0:02:38.54,Default,,0000,0000,0000,,drawing we have the thing that is called the revision block.
Dialogue: 0,0:02:38.67,0:02:41.23,Default,,0000,0000,0000,,The revision block describes the latest change at
Dialogue: 0,0:02:41.23,0:02:42.87,Default,,0000,0000,0000,,least that has been made to the drawing.
Dialogue: 0,0:02:42.95,0:02:43.74,Default,,0000,0000,0000,,In this case,
Dialogue: 0,0:02:44.07,0:02:45.22,Default,,0000,0000,0000,,it's a revision A,
Dialogue: 0,0:02:45.27,0:02:47.54,Default,,0000,0000,0000,,meaning it's just the initial release.
Dialogue: 0,0:02:47.99,0:02:50.74,Default,,0000,0000,0000,,The revision block only appears on sheet 1.
Dialogue: 0,0:02:51.51,0:02:55.54,Default,,0000,0000,0000,,We also have the thing on the drawing that's called the title block.
Dialogue: 0,0:02:55.67,0:02:56.63,Default,,0000,0000,0000,,The title block
Dialogue: 0,0:02:56.88,0:02:59.39,Default,,0000,0000,0000,,has a lot of very important information.
Dialogue: 0,0:02:59.63,0:03:02.02,Default,,0000,0000,0000,,And within the title block, we find things that
Dialogue: 0,0:03:02.02,0:03:05.25,Default,,0000,0000,0000,,are critical for being able to reproduce the geometry
Dialogue: 0,0:03:05.62,0:03:06.48,Default,,0000,0000,0000,,that's in
Dialogue: 0,0:03:06.94,0:03:10.15,Default,,0000,0000,0000,,the drawing. And so, we're gonna take a deeper look now at the title block,
Dialogue: 0,0:03:10.42,0:03:13.38,Default,,0000,0000,0000,,and we're gonna look at three separate parts of the title block.
Dialogue: 0,0:03:13.50,0:03:17.65,Default,,0000,0000,0000,,First, we're gonna take a look at this part here, which, of course, has like the title,
Dialogue: 0,0:03:17.94,0:03:19.61,Default,,0000,0000,0000,,also has a thing called
Dialogue: 0,0:03:19.85,0:03:23.98,Default,,0000,0000,0000,,the size, and, by the way, we are looking at B size drawings.
Dialogue: 0,0:03:24.02,0:03:26.49,Default,,0000,0000,0000,,These are 11 by 17
Dialogue: 0,0:03:27.31,0:03:28.03,Default,,0000,0000,0000,,inches.
Dialogue: 0,0:03:28.15,0:03:29.90,Default,,0000,0000,0000,,That's how big those drawings are.
Dialogue: 0,0:03:30.15,0:03:32.76,Default,,0000,0000,0000,,Now, a couple of key things to pay attention to here.
Dialogue: 0,0:03:33.08,0:03:35.83,Default,,0000,0000,0000,,Item number 1 is you should always have a sense
Dialogue: 0,0:03:35.83,0:03:38.70,Default,,0000,0000,0000,,for what revision of the drawing you're looking at.
Dialogue: 0,0:03:38.99,0:03:40.99,Default,,0000,0000,0000,,This is important because occasionally you'll
Dialogue: 0,0:03:40.99,0:03:43.18,Default,,0000,0000,0000,,be working with a colleague or another
Dialogue: 0,0:03:43.59,0:03:44.99,Default,,0000,0000,0000,,entity,
Dialogue: 0,0:03:45.13,0:03:47.26,Default,,0000,0000,0000,,maybe a supplier or something like this,
Dialogue: 0,0:03:47.47,0:03:50.31,Default,,0000,0000,0000,,and you want to make sure that you're on the same page. And the
Dialogue: 0,0:03:50.31,0:03:53.30,Default,,0000,0000,0000,,way we do that is you make sure you're looking at the same revision
Dialogue: 0,0:03:53.59,0:03:54.35,Default,,0000,0000,0000,,of the drawing.
Dialogue: 0,0:03:54.90,0:03:56.04,Default,,0000,0000,0000,,Speaking of pages,
Dialogue: 0,0:03:56.38,0:03:58.13,Default,,0000,0000,0000,,which is not what I meant just a minute ago,
Dialogue: 0,0:03:58.42,0:03:59.37,Default,,0000,0000,0000,,there 
Dialogue: 0,0:03:59.54,0:04:00.13,Default,,0000,0000,0000,,are
Dialogue: 0,0:04:00.38,0:04:02.33,Default,,0000,0000,0000,,multiple sheets in this drawing set,
Dialogue: 0,0:04:02.38,0:04:04.74,Default,,0000,0000,0000,,and there's always a list of how many sheets there are.
Dialogue: 0,0:04:04.82,0:04:07.66,Default,,0000,0000,0000,,That's important to know because if there's additional information on
Dialogue: 0,0:04:07.66,0:04:10.22,Default,,0000,0000,0000,,sheet 2 or 3 or 4 or 5 or 6,
Dialogue: 0,0:04:10.26,0:04:11.89,Default,,0000,0000,0000,,we want to go and get them.
Dialogue: 0,0:04:12.54,0:04:13.77,Default,,0000,0000,0000,,Also, we have
Dialogue: 0,0:04:14.39,0:04:16.21,Default,,0000,0000,0000,,information that is
Dialogue: 0,0:04:16.40,0:04:18.33,Default,,0000,0000,0000,,related to the overall
Dialogue: 0,0:04:19.39,0:04:24.17,Default,,0000,0000,0000,,mass properties of the object represented in the drawing. In this case, the weight
Dialogue: 0,0:04:24.54,0:04:29.01,Default,,0000,0000,0000,,is shown, and then also here to pay attention to is the scale.
Dialogue: 0,0:04:29.26,0:04:33.93,Default,,0000,0000,0000,,The scale is important to understand in the sense that if the scale was 1 to 1,
Dialogue: 0,0:04:34.26,0:04:38.45,Default,,0000,0000,0000,,then the object in the drawing would be printed
Dialogue: 0,0:04:38.70,0:04:41.82,Default,,0000,0000,0000,,on the drawing at the same size as the actual object.
Dialogue: 0,0:04:42.28,0:04:43.79,Default,,0000,0000,0000,,When the scale is 1 to 5,
Dialogue: 0,0:04:43.92,0:04:44.43,Default,,0000,0000,0000,,in this case,
Dialogue: 0,0:04:44.48,0:04:48.12,Default,,0000,0000,0000,,every 1 inch that's printed on the drawing represents 5 inches
Dialogue: 0,0:04:48.52,0:04:48.91,Default,,0000,0000,0000,,in
Dialogue: 0,0:04:49.12,0:04:49.99,Default,,0000,0000,0000,,reality.
Dialogue: 0,0:04:50.28,0:04:50.43,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:04:50.44,0:04:54.40,Default,,0000,0000,0000,,The next part of the title block that we're gonna take a look at captures authorship.
Dialogue: 0,0:04:54.68,0:04:58.43,Default,,0000,0000,0000,,And also, thedrawing has been checked, and frankly, you should
Dialogue: 0,0:04:58.92,0:05:01.24,Default,,0000,0000,0000,,always have your drawings checked. And you should not
Dialogue: 0,0:05:01.24,0:05:03.36,Default,,0000,0000,0000,,trust drawings that have not yet been checked.
Dialogue: 0,0:05:04.00,0:05:07.03,Default,,0000,0000,0000,,Also, in this part of the drawing, we find the units
Dialogue: 0,0:05:07.36,0:05:07.95,Default,,0000,0000,0000,,for
Dialogue: 0,0:05:08.21,0:05:09.80,Default,,0000,0000,0000,,how the drawing was created.
Dialogue: 0,0:05:09.84,0:05:12.88,Default,,0000,0000,0000,,In this case, this drawing is in the units of millimeters.
Dialogue: 0,0:05:13.48,0:05:15.15,Default,,0000,0000,0000,,We also find the important
Dialogue: 0,0:05:15.65,0:05:21.20,Default,,0000,0000,0000,,area that is describing the material of the object represented in the drawing.
Dialogue: 0,0:05:21.21,0:05:21.87,Default,,0000,0000,0000,,In this case,
Dialogue: 0,0:05:22.01,0:05:25.40,Default,,0000,0000,0000,,the turbocharger in the drawing is of titanium grade 5.
Dialogue: 0,0:05:25.97,0:05:28.33,Default,,0000,0000,0000,,Also, in the drawing, we can find 
Dialogue: 0,0:05:28.54,0:05:30.58,Default,,0000,0000,0000,,finish if there is one specified and if there's
Dialogue: 0,0:05:30.58,0:05:32.45,Default,,0000,0000,0000,,not one specified, it will simply say that.
Dialogue: 0,0:05:32.46,0:05:32.94,Default,,0000,0000,0000,,And then,
Dialogue: 0,0:05:33.22,0:05:36.05,Default,,0000,0000,0000,,also, here there's a section for comments. And in this course,
Dialogue: 0,0:05:36.34,0:05:39.11,Default,,0000,0000,0000,,this is where we actually put our color specifications.
Dialogue: 0,0:05:39.65,0:05:39.71,Default,,0000,0000,0000,,This
Dialogue: 0,0:05:39.74,0:05:43.02,Default,,0000,0000,0000,,is not a color specification for the turbocharger.
Dialogue: 0,0:05:43.06,0:05:44.77,Default,,0000,0000,0000,,This would have meant the turbocharger was
Dialogue: 0,0:05:45.22,0:05:46.46,Default,,0000,0000,0000,,perfectly red.
Dialogue: 0,0:05:47.01,0:05:47.38,Default,,0000,0000,0000,,But 
Dialogue: 0,0:05:47.45,0:05:50.01,Default,,0000,0000,0000,,I have just put that in there as a quick sample just
Dialogue: 0,0:05:50.01,0:05:53.92,Default,,0000,0000,0000,,to show you that those will often show up in our comments.
Dialogue: 0,0:05:54.09,0:05:56.77,Default,,0000,0000,0000,,We also then have this other part of the title block,
Dialogue: 0,0:05:57.09,0:05:59.42,Default,,0000,0000,0000,,which is the sheet tolerances.
Dialogue: 0,0:05:59.58,0:06:01.45,Default,,0000,0000,0000,,Now, what's going on with sheet tolerances?
Dialogue: 0,0:06:01.53,0:06:01.82,Default,,0000,0000,0000,,First of all,
Dialogue: 0,0:06:01.85,0:06:03.84,Default,,0000,0000,0000,,we have to know that this part represents
Dialogue: 0,0:06:04.21,0:06:07.81,Default,,0000,0000,0000,,important information relative to the dimensions in the drawing.
Dialogue: 0,0:06:08.85,0:06:10.93,Default,,0000,0000,0000,,So, we're going to go look at one of the dimensions right now.
Dialogue: 0,0:06:11.00,0:06:11.55,Default,,0000,0000,0000,,From the
Dialogue: 0,0:06:11.80,0:06:14.83,Default,,0000,0000,0000,,top edge of this object to the center of this hole
Dialogue: 0,0:06:15.12,0:06:19.08,Default,,0000,0000,0000,,is supposed to be 23.00 millimeters.
Dialogue: 0,0:06:19.68,0:06:24.79,Default,,0000,0000,0000,,Now, we can understand from this part of the drawing and from the sheet tolerances
Dialogue: 0,0:06:25.11,0:06:26.43,Default,,0000,0000,0000,,that what this means
Dialogue: 0,0:06:26.80,0:06:28.01,Default,,0000,0000,0000,,is that because our
Dialogue: 0,0:06:28.62,0:06:29.49,Default,,0000,0000,0000,,has two
Dialogue: 0,0:06:32.14,0:06:34.49,Default,,0000,0000,0000,,bits of information beyond the decimal point,
Dialogue: 0,0:06:34.78,0:06:36.58,Default,,0000,0000,0000,,then we will be referring to
Dialogue: 0,0:06:36.90,0:06:39.14,Default,,0000,0000,0000,,this portion in the general
Dialogue: 0,0:06:39.78,0:06:40.46,Default,,0000,0000,0000,,tolerances,
Dialogue: 0,0:06:40.50,0:06:41.70,Default,,0000,0000,0000,,the sheet tolerances,
Dialogue: 0,0:06:41.98,0:06:44.36,Default,,0000,0000,0000,,which mean that the 23
Dialogue: 0,0:06:44.66,0:06:47.48,Default,,0000,0000,0000,,is plus or minus 0.15 millimeters.
Dialogue: 0,0:06:48.18,0:06:48.58,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:06:48.86,0:06:51.94,Default,,0000,0000,0000,,if our drawing would have instead just had one
Dialogue: 0,0:06:52.33,0:06:55.19,Default,,0000,0000,0000,,bit of information beyond the decimal spot,
Dialogue: 0,0:06:55.36,0:06:59.17,Default,,0000,0000,0000,,we would have been looking at plus or minus 0.25 millimeters.
Dialogue: 0,0:06:59.56,0:07:03.07,Default,,0000,0000,0000,,Now, this is important because all of those tolerances are essential,
Dialogue: 0,0:07:03.36,0:07:04.58,Default,,0000,0000,0000,,but we don't want to put them,
Dialogue: 0,0:07:04.72,0:07:07.35,Default,,0000,0000,0000,,every single one of them on the drawing itself
Dialogue: 0,0:07:07.88,0:07:09.03,Default,,0000,0000,0000,,because it will
Dialogue: 0,0:07:09.61,0:07:10.65,Default,,0000,0000,0000,,clutter up the drawings.
Dialogue: 0,0:07:10.68,0:07:12.20,Default,,0000,0000,0000,,So, they go into the sheet
Dialogue: 0,0:07:12.75,0:07:15.32,Default,,0000,0000,0000,,definition, so into the sheet tolerances.
Dialogue: 0,0:07:15.63,0:07:17.31,Default,,0000,0000,0000,,That's what that means.
Dialogue: 0,0:07:17.43,0:07:17.86,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:07:18.03,0:07:21.19,Default,,0000,0000,0000,,Well, those were the main things that we wanted to look at in the
Dialogue: 0,0:07:21.19,0:07:24.96,Default,,0000,0000,0000,,title block. We have finished our sort of deep dive on the title block.
Dialogue: 0,0:07:25.23,0:07:28.67,Default,,0000,0000,0000,,And then, I'll just go through a few other things here and say that
Dialogue: 0,0:07:29.03,0:07:31.02,Default,,0000,0000,0000,,drawings always have
Dialogue: 0,0:07:31.31,0:07:33.39,Default,,0000,0000,0000,,a set of general drawing notes.
Dialogue: 0,0:07:33.43,0:07:36.55,Default,,0000,0000,0000,,These drawing notes apply to the entire drawing 
Dialogue: 0,0:07:37.01,0:07:37.41,Default,,0000,0000,0000,,set,
Dialogue: 0,0:07:37.78,0:07:39.30,Default,,0000,0000,0000,,sometimes just the entire page,
Dialogue: 0,0:07:39.35,0:07:42.28,Default,,0000,0000,0000,,but sometimes it can apply to all the sheets.
Dialogue: 0,0:07:42.45,0:07:46.44,Default,,0000,0000,0000,,But then we also have specific notes that can apply to just a specific
Dialogue: 0,0:07:46.81,0:07:51.10,Default,,0000,0000,0000,,part located or a specific portion of a part located on the drawing,
Dialogue: 0,0:07:51.13,0:07:52.76,Default,,0000,0000,0000,,and there's always a leader line
Dialogue: 0,0:07:53.01,0:07:55.73,Default,,0000,0000,0000,,that is connected to where that note matters.
Dialogue: 0,0:07:56.53,0:07:56.55,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:07:57.52,0:07:59.74,Default,,0000,0000,0000,,Now, we have to look at the geometry
Dialogue: 0,0:08:00.04,0:08:05.19,Default,,0000,0000,0000,,of the drawing. Here, we have what's called the orthographic projections,
Dialogue: 0,0:08:05.40,0:08:08.12,Default,,0000,0000,0000,,the orthographic projection views we could call them.
Dialogue: 0,0:08:08.20,0:08:08.67,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:08:08.88,0:08:09.39,Default,,0000,0000,0000,,And then,
Dialogue: 0,0:08:09.52,0:08:10.87,Default,,0000,0000,0000,,we also have
Dialogue: 0,0:08:11.28,0:08:15.84,Default,,0000,0000,0000,,within those orthographic projection views, a special kind of line that we don't
Dialogue: 0,0:08:15.84,0:08:19.48,Default,,0000,0000,0000,,see anywhere else and that is a dashed line and that dashed line
Dialogue: 0,0:08:19.61,0:08:22.08,Default,,0000,0000,0000,,is called a hidden line. And a hidden line is
Dialogue: 0,0:08:22.08,0:08:25.39,Default,,0000,0000,0000,,like an X-ray view we basically can see into the object
Dialogue: 0,0:08:25.72,0:08:27.72,Default,,0000,0000,0000,,and what all the dashed line
Dialogue: 0,0:08:27.72,0:08:30.99,Default,,0000,0000,0000,,are representing internal geometry
Dialogue: 0,0:08:31.24,0:08:33.28,Default,,0000,0000,0000,,that we can't see from outside but we
Dialogue: 0,0:08:33.60,0:08:36.35,Default,,0000,0000,0000,,can see through in an X-ray sort of form.
Dialogue: 0,0:08:36.68,0:08:38.72,Default,,0000,0000,0000,,Now, there is another image
Dialogue: 0,0:08:39.00,0:08:42.52,Default,,0000,0000,0000,,on here, another view, it's called the isometric view it's the one at the top
Dialogue: 0,0:08:43.17,0:08:46.44,Default,,0000,0000,0000,,right of the drawing, and the top right drawing
Dialogue: 0,0:08:46.71,0:08:50.32,Default,,0000,0000,0000,,view the isometric view never has hidden lines.
Dialogue: 0,0:08:50.54,0:08:50.78,Default,,0000,0000,0000,,This 
Dialogue: 0,0:08:50.79,0:08:55.38,Default,,0000,0000,0000,,is a standard for drawing so we can always see the isometric view
Dialogue: 0,0:08:55.59,0:08:59.23,Default,,0000,0000,0000,,and we can have a sense for what the object is that's to help us with that,
Dialogue: 0,0:08:59.31,0:09:01.83,Default,,0000,0000,0000,,but it's not gonna show us hidden lines.
Dialogue: 0,0:09:01.95,0:09:02.99,Default,,0000,0000,0000,,Now, it's worth spending
Dialogue: 0,0:09:03.56,0:09:03.92,Default,,0000,0000,0000,,just 
Dialogue: 0,0:09:03.93,0:09:06.00,Default,,0000,0000,0000,,a little bit of time trying
Dialogue: 0,0:09:06.00,0:09:09.40,Default,,0000,0000,0000,,to understand what is this orthographic projection.
Dialogue: 0,0:09:09.64,0:09:12.99,Default,,0000,0000,0000,,If you understand the thing that I'm going to describe in the next moment,
Dialogue: 0,0:09:13.24,0:09:16.40,Default,,0000,0000,0000,,then orthographic projections will become meaningful to you,
Dialogue: 0,0:09:16.60,0:09:17.36,Default,,0000,0000,0000,,will become useful,
Dialogue: 0,0:09:17.38,0:09:19.73,Default,,0000,0000,0000,,and you'll be able to understand engineering drawings
Dialogue: 0,0:09:20.08,0:09:20.47,Default,,0000,0000,0000,,of 
Dialogue: 0,0:09:20.56,0:09:23.35,Default,,0000,0000,0000,,this form indefinitely into the future.
Dialogue: 0,0:09:23.58,0:09:26.79,Default,,0000,0000,0000,,So, I'm gonna show you the same orthographic projections
Dialogue: 0,0:09:27.20,0:09:27.96,Default,,0000,0000,0000,,shown
Dialogue: 0,0:09:28.70,0:09:31.08,Default,,0000,0000,0000,,in just a little bit larger here,
Dialogue: 0,0:09:31.37,0:09:34.80,Default,,0000,0000,0000,,and what we want to do is take a look at the front view for a second.
Dialogue: 0,0:09:35.01,0:09:36.70,Default,,0000,0000,0000,,When we're looking at the front view,
Dialogue: 0,0:09:37.09,0:09:37.44,Default,,0000,0000,0000,,what 
Dialogue: 0,0:09:37.49,0:09:39.16,Default,,0000,0000,0000,,we are really looking at
Dialogue: 0,0:09:39.50,0:09:40.36,Default,,0000,0000,0000,,is
Dialogue: 0,0:09:40.37,0:09:41.00,Default,,0000,0000,0000,,a
Dialogue: 0,0:09:41.37,0:09:42.88,Default,,0000,0000,0000,,projection
Dialogue: 0,0:09:43.41,0:09:46.92,Default,,0000,0000,0000,,of the object directly onto its front face.
Dialogue: 0,0:09:47.29,0:09:47.72,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:09:48.17,0:09:52.64,Default,,0000,0000,0000,,if you can see the red box that's on the right-hand side here,
Dialogue: 0,0:09:53.13,0:09:55.93,Default,,0000,0000,0000,,the front view is exactly the front view direction.
Dialogue: 0,0:09:56.78,0:09:56.97,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:09:57.00,0:09:58.03,Default,,0000,0000,0000,,if I were to
Dialogue: 0,0:09:58.52,0:10:00.32,Default,,0000,0000,0000,,take a line
Dialogue: 0,0:10:00.96,0:10:04.77,Default,,0000,0000,0000,,and draw it on the paper between the top view and the front view
Dialogue: 0,0:10:05.12,0:10:08.51,Default,,0000,0000,0000,,and then fold it right there at 90 degrees,
Dialogue: 0,0:10:08.72,0:10:10.39,Default,,0000,0000,0000,,I would create the edge of a cube.
Dialogue: 0,0:10:11.02,0:10:13.21,Default,,0000,0000,0000,,And the edge of that cube would be such that when I
Dialogue: 0,0:10:13.21,0:10:16.36,Default,,0000,0000,0000,,look down from the top of the cube, I see the top view,
Dialogue: 0,0:10:16.65,0:10:19.26,Default,,0000,0000,0000,,and when I look at the front of the cube, I see the front view.
Dialogue: 0,0:10:19.53,0:10:20.25,Default,,0000,0000,0000,,Now, likewise,
Dialogue: 0,0:10:20.37,0:10:23.09,Default,,0000,0000,0000,,if I were to fold between the front view and
Dialogue: 0,0:10:23.09,0:10:25.79,Default,,0000,0000,0000,,the right view and leave the paper at 90 degrees,
Dialogue: 0,0:10:25.81,0:10:27.20,Default,,0000,0000,0000,,I'd form another
Dialogue: 0,0:10:27.57,0:10:28.85,Default,,0000,0000,0000,,edge of a cube.
Dialogue: 0,0:10:29.59,0:10:32.10,Default,,0000,0000,0000,,And when I look at the right side of that cube, I would
Dialogue: 0,0:10:32.10,0:10:34.30,Default,,0000,0000,0000,,see the right view, and when I look at the front view,
Dialogue: 0,0:10:34.42,0:10:36.38,Default,,0000,0000,0000,,I would see the front view, and if I look at the top view,
Dialogue: 0,0:10:36.46,0:10:37.55,Default,,0000,0000,0000,,I'd see the top view.
Dialogue: 0,0:10:37.74,0:10:41.68,Default,,0000,0000,0000,,And this is how an orthographic projection works.
Dialogue: 0,0:10:41.82,0:10:42.97,Default,,0000,0000,0000,,It's simple
Dialogue: 0,0:10:43.74,0:10:45.28,Default,,0000,0000,0000,,when someone has described it to you,
Dialogue: 0,0:10:45.35,0:10:46.57,Default,,0000,0000,0000,,but is otherwise,
Dialogue: 0,0:10:48.11,0:10:48.79,Default,,0000,0000,0000,,for some people,
Dialogue: 0,0:10:48.83,0:10:51.27,Default,,0000,0000,0000,,not super obvious. So, hopefully, you will walk
Dialogue: 0,0:10:51.27,0:10:53.33,Default,,0000,0000,0000,,away with a little bit of information there
Dialogue: 0,0:10:53.59,0:10:54.94,Default,,0000,0000,0000,,on how to interpret
Dialogue: 0,0:10:55.23,0:10:55.70,Default,,0000,0000,0000,,these
Dialogue: 0,0:10:55.99,0:10:57.82,Default,,0000,0000,0000,,orthographic projections.
Dialogue: 0,0:10:58.11,0:11:01.86,Default,,0000,0000,0000,,So, now, you should be able to look at an engineering drawing like this
Dialogue: 0,0:11:02.15,0:11:04.79,Default,,0000,0000,0000,,and not get super overwhelmed by it because
Dialogue: 0,0:11:04.79,0:11:06.98,Default,,0000,0000,0000,,you know that all the information around the edge
Dialogue: 0,0:11:07.43,0:11:08.81,Default,,0000,0000,0000,,is the sheet format.
Dialogue: 0,0:11:09.03,0:11:11.39,Default,,0000,0000,0000,,You know that down in the bottom right corner, we
Dialogue: 0,0:11:11.39,0:11:14.30,Default,,0000,0000,0000,,have our title block with a bunch of essential information.
Dialogue: 0,0:11:14.51,0:11:16.43,Default,,0000,0000,0000,,We have our revision block at the top right.
Dialogue: 0,0:11:16.88,0:11:19.08,Default,,0000,0000,0000,,Then, we have two kinds of views here.
Dialogue: 0,0:11:19.16,0:11:22.40,Default,,0000,0000,0000,,We have the orthographic projections, which have the front,
Dialogue: 0,0:11:22.60,0:11:22.79,Default,,0000,0000,0000,,right,
Dialogue: 0,0:11:22.80,0:11:25.67,Default,,0000,0000,0000,,and top view, and then we have the isometric view,
Dialogue: 0,0:11:26.00,0:11:30.87,Default,,0000,0000,0000,,which is shown without hidden lines in the top right portion of the drawing
Dialogue: 0,0:11:31.08,0:11:32.29,Default,,0000,0000,0000,,and helps us get 
Dialogue: 0,0:11:32.44,0:11:35.25,Default,,0000,0000,0000,,even a better sense for what the object is all about.
Dialogue: 0,0:11:36.29,0:11:36.87,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:11:37.17,0:11:39.16,Default,,0000,0000,0000,,That was what sheet 1 looked like.
Dialogue: 0,0:11:39.53,0:11:40.00,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:11:40.27,0:11:41.13,Default,,0000,0000,0000,,in sheet 1,
Dialogue: 0,0:11:41.23,0:11:43.12,Default,,0000,0000,0000,,we saw those orthographic projections;
Dialogue: 0,0:11:43.21,0:11:45.08,Default,,0000,0000,0000,,we saw the isometric view.
Dialogue: 0,0:11:46.16,0:11:47.88,Default,,0000,0000,0000,,And in sheet 2,
Dialogue: 0,0:11:48.04,0:11:50.04,Default,,0000,0000,0000,,we see what is called auxiliary views.
Dialogue: 0,0:11:50.12,0:11:50.24,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:11:50.25,0:11:52.27,Default,,0000,0000,0000,,auxiliary views are not limited to
Dialogue: 0,0:11:52.60,0:11:53.64,Default,,0000,0000,0000,,being on page 2,
Dialogue: 0,0:11:53.72,0:11:55.12,Default,,0000,0000,0000,,they could be on page 1.
Dialogue: 0,0:11:55.83,0:11:57.08,Default,,0000,0000,0000,,But in this case,
Dialogue: 0,0:11:57.32,0:11:58.67,Default,,0000,0000,0000,,in this particular drawing,
Dialogue: 0,0:11:58.96,0:12:01.79,Default,,0000,0000,0000,,our auxiliary views happen to be on sheet 2.
Dialogue: 0,0:12:02.00,0:12:04.51,Default,,0000,0000,0000,,They could have been on sheet 3, 4, 5, 6,
Dialogue: 0,0:12:04.68,0:12:05.31,Default,,0000,0000,0000,,or 1.
Dialogue: 0,0:12:05.56,0:12:06.00,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:12:06.78,0:12:08.70,Default,,0000,0000,0000,,Now in order to understand the auxiliary views,
Dialogue: 0,0:12:08.78,0:12:09.52,Default,,0000,0000,0000,,we need to
Dialogue: 0,0:12:09.86,0:12:11.21,Default,,0000,0000,0000,,zoom in just a bit
Dialogue: 0,0:12:11.50,0:12:13.66,Default,,0000,0000,0000,,on this portion of sheet 1
Dialogue: 0,0:12:14.06,0:12:15.70,Default,,0000,0000,0000,,and see what's going on here.
Dialogue: 0,0:12:16.02,0:12:18.21,Default,,0000,0000,0000,,Within this set portion,
Dialogue: 0,0:12:18.38,0:12:20.77,Default,,0000,0000,0000,,when we're looking at the front view from sheet 1,
Dialogue: 0,0:12:21.02,0:12:24.29,Default,,0000,0000,0000,,we see this dashed line with the two arrows on it.
Dialogue: 0,0:12:24.61,0:12:26.53,Default,,0000,0000,0000,,This is called a section marker,
Dialogue: 0,0:12:26.70,0:12:30.53,Default,,0000,0000,0000,,and what a section marker means is that we are going to slice the part
Dialogue: 0,0:12:30.83,0:12:32.74,Default,,0000,0000,0000,,right where the dashed line is, and then we're going
Dialogue: 0,0:12:32.74,0:12:36.46,Default,,0000,0000,0000,,to look in the directions of the arrows labeled AA.
Dialogue: 0,0:12:36.75,0:12:38.34,Default,,0000,0000,0000,,And what are we gonna see if we do that?
Dialogue: 0,0:12:38.38,0:12:39.25,Default,,0000,0000,0000,,We're gonna see
Dialogue: 0,0:12:39.46,0:12:40.81,Default,,0000,0000,0000,,this box that's now
Dialogue: 0,0:12:41.10,0:12:42.74,Default,,0000,0000,0000,,highlighted on sheet 2.
Dialogue: 0,0:12:43.06,0:12:45.01,Default,,0000,0000,0000,,How do we know that that's the box we're gonna see?
Dialogue: 0,0:12:45.14,0:12:45.26,Default,,0000,0000,0000,,Well,
Dialogue: 0,0:12:45.39,0:12:47.77,Default,,0000,0000,0000,,primarily, we know it's the box we're gonna see because
Dialogue: 0,0:12:47.97,0:12:48.81,Default,,0000,0000,0000,,it's labeled.
Dialogue: 0,0:12:49.02,0:12:53.18,Default,,0000,0000,0000,,It's called section AA, and that's exactly what we were looking at
Dialogue: 0,0:12:53.18,0:12:57.82,Default,,0000,0000,0000,,in sheet 1 was a marker showing what section AA would be.
Dialogue: 0,0:12:58.14,0:12:59.24,Default,,0000,0000,0000,,And now on sheet 2,
Dialogue: 0,0:12:59.28,0:12:59.88,Default,,0000,0000,0000,,we're looking at that.
Dialogue: 0,0:12:59.96,0:13:00.61,Default,,0000,0000,0000,,So, we're going to
Dialogue: 0,0:13:00.84,0:13:03.51,Default,,0000,0000,0000,,go take a look even deeper now at sheet 2.
Dialogue: 0,0:13:03.76,0:13:05.64,Default,,0000,0000,0000,,Now that we know that we're looking at 2
Dialogue: 0,0:13:06.03,0:13:07.16,Default,,0000,0000,0000,,section views,
Dialogue: 0,0:13:07.28,0:13:09.28,Default,,0000,0000,0000,,section views are auxiliary views.
Dialogue: 0,0:13:10.08,0:13:10.40,Default,,0000,0000,0000,,Alright,
Dialogue: 0,0:13:10.52,0:13:12.67,Default,,0000,0000,0000,,now a few things to point out on this sheet.
Dialogue: 0,0:13:13.00,0:13:13.67,Default,,0000,0000,0000,,We have
Dialogue: 0,0:13:14.23,0:13:17.23,Default,,0000,0000,0000,,the name of the auxiliary view with its scale,
Dialogue: 0,0:13:17.40,0:13:19.87,Default,,0000,0000,0000,,if it has been scaled, and this one has been scaled.
Dialogue: 0,0:13:20.71,0:13:21.87,Default,,0000,0000,0000,,We also see that
Dialogue: 0,0:13:22.11,0:13:25.05,Default,,0000,0000,0000,,there's a new kind of line that's appearing on the drawing,
Dialogue: 0,0:13:25.07,0:13:26.46,Default,,0000,0000,0000,,and this is the crosshatch.
Dialogue: 0,0:13:26.67,0:13:27.91,Default,,0000,0000,0000,,Whenever there's a crosshatch,
Dialogue: 0,0:13:27.99,0:13:30.42,Default,,0000,0000,0000,,this means that we have sliced through material
Dialogue: 0,0:13:30.63,0:13:33.98,Default,,0000,0000,0000,,and we're actually looking at material and not void space.
Dialogue: 0,0:13:34.23,0:13:34.86,Default,,0000,0000,0000,,So, for example,
Dialogue: 0,0:13:34.91,0:13:37.74,Default,,0000,0000,0000,,if we look at the holes that are on the same view,
Dialogue: 0,0:13:38.03,0:13:39.95,Default,,0000,0000,0000,,those holes are not crosshatched, that means
Dialogue: 0,0:13:39.95,0:13:42.30,Default,,0000,0000,0000,,they're void space. It means there's nothing there,
Dialogue: 0,0:13:42.59,0:13:46.31,Default,,0000,0000,0000,,but the crosshatch means there is something there and that's material.
Dialogue: 0,0:13:46.83,0:13:47.07,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:13:47.19,0:13:48.82,Default,,0000,0000,0000,,What is the next piece we're gonna look at?
Dialogue: 0,0:13:48.95,0:13:53.06,Default,,0000,0000,0000,,We're gonna notice here that there are center lines and center marks.
Dialogue: 0,0:13:53.43,0:13:54.86,Default,,0000,0000,0000,,These pieces of
Dialogue: 0,0:13:55.93,0:13:57.81,Default,,0000,0000,0000,,sort of invisible geometry,
Dialogue: 0,0:13:57.87,0:13:59.06,Default,,0000,0000,0000,,maybe we can call them,
Dialogue: 0,0:13:59.31,0:14:01.75,Default,,0000,0000,0000,,are important for dimensioning too
Dialogue: 0,0:14:02.33,0:14:05.35,Default,,0000,0000,0000,,or understanding symmetries in some cases.
Dialogue: 0,0:14:05.81,0:14:06.05,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:14:06.17,0:14:09.68,Default,,0000,0000,0000,,We also have in this sheet 2 dimensions,
Dialogue: 0,0:14:10.00,0:14:10.97,Default,,0000,0000,0000,,such as this dimension,
Dialogue: 0,0:14:11.01,0:14:16.21,Default,,0000,0000,0000,,which means that the overall length of this object is 268 millimeters.
Dialogue: 0,0:14:16.73,0:14:18.77,Default,,0000,0000,0000,,We also see some other dimensions,
Dialogue: 0,0:14:18.93,0:14:21.52,Default,,0000,0000,0000,,some that appear a little bit more complicated.
Dialogue: 0,0:14:21.77,0:14:23.59,Default,,0000,0000,0000,,And what this dimension means,
Dialogue: 0,0:14:24.01,0:14:25.24,Default,,0000,0000,0000,,the dimension that says
Dialogue: 0,0:14:25.57,0:14:28.96,Default,,0000,0000,0000,,4X R20.00
Dialogue: 0,0:14:29.37,0:14:29.86,Default,,0000,0000,0000,,means
Dialogue: 0,0:14:30.13,0:14:33.89,Default,,0000,0000,0000,,that there are four arcs on this part that have a radius
Dialogue: 0,0:14:34.37,0:14:35.42,Default,,0000,0000,0000,,of 20 millimeters.
Dialogue: 0,0:14:36.01,0:14:37.52,Default,,0000,0000,0000,,And then, likewise,
Dialogue: 0,0:14:37.85,0:14:39.70,Default,,0000,0000,0000,,there is a dimension here that says
Dialogue: 0,0:14:40.05,0:14:44.08,Default,,0000,0000,0000,,there are four circles on this part that have a diameter
Dialogue: 0,0:14:44.37,0:14:46.63,Default,,0000,0000,0000,,of 20 millimeters. So, when there's an R,
Dialogue: 0,0:14:47.01,0:14:49.04,Default,,0000,0000,0000,,this is a dimension that goes on an arc
Dialogue: 0,0:14:49.41,0:14:55.09,Default,,0000,0000,0000,,or an incomplete circle when there is the diameter symbol or the letters DIA.
Dialogue: 0,0:14:55.64,0:14:59.99,Default,,0000,0000,0000,,This means that this is a diameter and we do that for full circles.
Dialogue: 0,0:15:00.20,0:15:03.55,Default,,0000,0000,0000,,The 4X that precedes it in this case simply means that
Dialogue: 0,0:15:03.80,0:15:04.75,Default,,0000,0000,0000,,there are four
Dialogue: 0,0:15:04.92,0:15:07.67,Default,,0000,0000,0000,,identical geometries on this part
Dialogue: 0,0:15:07.92,0:15:09.19,Default,,0000,0000,0000,,that have that same
Dialogue: 0,0:15:09.44,0:15:10.05,Default,,0000,0000,0000,,dimension.
Dialogue: 0,0:15:11.10,0:15:14.94,Default,,0000,0000,0000,,Now, of course, on this drawing, there are many dimensions. That is the purpose
Dialogue: 0,0:15:15.19,0:15:19.58,Default,,0000,0000,0000,,of the drawing is actually to convey geometric information.
Dialogue: 0,0:15:19.99,0:15:24.08,Default,,0000,0000,0000,,And don't forget the rectangular red box there in the title block
Dialogue: 0,0:15:24.27,0:15:26.52,Default,,0000,0000,0000,,the drawing is also designed to convey
Dialogue: 0,0:15:27.11,0:15:28.19,Default,,0000,0000,0000,,material information.
Dialogue: 0,0:15:28.68,0:15:28.92,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:15:29.08,0:15:30.88,Default,,0000,0000,0000,,So, we have just taken a look at
Dialogue: 0,0:15:31.29,0:15:32.08,Default,,0000,0000,0000,,part drawings.
Dialogue: 0,0:15:32.12,0:15:32.63,Default,,0000,0000,0000,,In this case,
Dialogue: 0,0:15:32.68,0:15:35.41,Default,,0000,0000,0000,,a multi-sheet part drawing for this turbocharger.
Dialogue: 0,0:15:35.72,0:15:36.59,Default,,0000,0000,0000,,And hopefully,
Dialogue: 0,0:15:36.84,0:15:37.32,Default,,0000,0000,0000,,we have,
Dialogue: 0,0:15:37.44,0:15:38.40,Default,,0000,0000,0000,,as I mentioned before,
Dialogue: 0,0:15:38.60,0:15:40.23,Default,,0000,0000,0000,,demystified it a little bit
Dialogue: 0,0:15:40.48,0:15:41.45,Default,,0000,0000,0000,,and shown
Dialogue: 0,0:15:41.84,0:15:43.60,Default,,0000,0000,0000,,that it is full of
Dialogue: 0,0:15:44.61,0:15:46.64,Default,,0000,0000,0000,,orthographic projection views,
Dialogue: 0,0:15:47.00,0:15:48.45,Default,,0000,0000,0000,,isometric views,
Dialogue: 0,0:15:48.68,0:15:50.23,Default,,0000,0000,0000,,and some auxiliary views,
Dialogue: 0,0:15:50.52,0:15:54.51,Default,,0000,0000,0000,,and then those allow dimensions to be put onto
Dialogue: 0,0:15:54.87,0:15:58.24,Default,,0000,0000,0000,,the object that help us understand more and more about it.
Dialogue: 0,0:15:58.70,0:15:59.38,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:15:59.55,0:16:03.02,Default,,0000,0000,0000,,It is now time for us to stop thinking about part drawings,
Dialogue: 0,0:16:03.03,0:16:04.19,Default,,0000,0000,0000,,and we're going to talk about
Dialogue: 0,0:16:04.47,0:16:08.39,Default,,0000,0000,0000,,assembly drawings. And in this case, I'm showing you a five
Dialogue: 0,0:16:08.39,0:16:12.79,Default,,0000,0000,0000,,sheet assembly drawing for the NES game controller by Nintendo.
Dialogue: 0,0:16:13.19,0:16:16.02,Default,,0000,0000,0000,,Now, it's five sheets because we need to know
Dialogue: 0,0:16:16.47,0:16:18.62,Default,,0000,0000,0000,,this thing in the top left corner
Dialogue: 0,0:16:18.91,0:16:20.82,Default,,0000,0000,0000,,is just an isometric
Dialogue: 0,0:16:21.41,0:16:22.52,Default,,0000,0000,0000,,screenshot
Dialogue: 0,0:16:22.87,0:16:25.02,Default,,0000,0000,0000,,just to let you know the object that we're working on.
Dialogue: 0,0:16:25.07,0:16:27.59,Default,,0000,0000,0000,,It's not part of the actual drawing set.
Dialogue: 0,0:16:28.11,0:16:28.35,Default,,0000,0000,0000,,All right,
Dialogue: 0,0:16:28.51,0:16:29.83,Default,,0000,0000,0000,,so within this drawing set,
Dialogue: 0,0:16:29.92,0:16:30.47,Default,,0000,0000,0000,,however,
Dialogue: 0,0:16:31.69,0:16:36.09,Default,,0000,0000,0000,,there are five sheets. And we're going to take a look at just three of those sheets—
Dialogue: 0,0:16:36.24,0:16:36.76,Default,,0000,0000,0000,,sheet 1,
Dialogue: 0,0:16:37.00,0:16:37.56,Default,,0000,0000,0000,,sheet 2,
Dialogue: 0,0:16:37.60,0:16:38.47,Default,,0000,0000,0000,,and sheet 3.
Dialogue: 0,0:16:38.64,0:16:39.83,Default,,0000,0000,0000,,The other sheets are valuable,
Dialogue: 0,0:16:39.96,0:16:42.80,Default,,0000,0000,0000,,but they're not going to teach us anything new about how to interpret
Dialogue: 0,0:16:43.65,0:16:44.74,Default,,0000,0000,0000,,an assembly drawing,
Dialogue: 0,0:16:44.79,0:16:46.46,Default,,0000,0000,0000,,which is what we're gonna do right now.
Dialogue: 0,0:16:46.80,0:16:47.26,Default,,0000,0000,0000,,All right,
Dialogue: 0,0:16:47.55,0:16:49.87,Default,,0000,0000,0000,,take a look at this first sheet
Dialogue: 0,0:16:50.15,0:16:50.82,Default,,0000,0000,0000,,of the
Dialogue: 0,0:16:51.03,0:16:54.94,Default,,0000,0000,0000,,Nintendo NES game controller, and let's notice first of all
Dialogue: 0,0:16:55.27,0:16:57.71,Default,,0000,0000,0000,,the things that are similar from the part drawing,
Dialogue: 0,0:16:58.57,0:16:59.97,Default,,0000,0000,0000,,part drawings that we looked at.
Dialogue: 0,0:17:00.32,0:17:03.45,Default,,0000,0000,0000,,Sheet formats the same exact concept; zone marker,
Dialogue: 0,0:17:03.61,0:17:07.93,Default,,0000,0000,0000,,same concept; revision block, the same; title block, same concept;
Dialogue: 0,0:17:07.93,0:17:12.64,Default,,0000,0000,0000,,general notes, same concept. We have orthographic projection views here.
Dialogue: 0,0:17:13.09,0:17:16.85,Default,,0000,0000,0000,,We also have isometric views, and we also have dimensions.
Dialogue: 0,0:17:17.01,0:17:18.29,Default,,0000,0000,0000,,So, what's new then?
Dialogue: 0,0:17:18.48,0:17:18.71,Default,,0000,0000,0000,,Well,
Dialogue: 0,0:17:18.93,0:17:20.36,Default,,0000,0000,0000,,there are some new things here.
Dialogue: 0,0:17:20.81,0:17:22.68,Default,,0000,0000,0000,,We have assembly dimensions.
Dialogue: 0,0:17:22.89,0:17:25.81,Default,,0000,0000,0000,,These are dimensions that don't exist on any part drawing.
Dialogue: 0,0:17:26.21,0:17:30.53,Default,,0000,0000,0000,,This is one of the main purposes of assembly drawings is to help convey
Dialogue: 0,0:17:30.89,0:17:32.52,Default,,0000,0000,0000,,dimensions that are essential,
Dialogue: 0,0:17:32.85,0:17:34.65,Default,,0000,0000,0000,,but don't exist on part drawings.
Dialogue: 0,0:17:34.73,0:17:35.44,Default,,0000,0000,0000,,For example,
Dialogue: 0,0:17:35.81,0:17:36.60,Default,,0000,0000,0000,,this is
Dialogue: 0,0:17:37.08,0:17:38.92,Default,,0000,0000,0000,,measuring from one edge
Dialogue: 0,0:17:39.66,0:17:42.58,Default,,0000,0000,0000,,of a part to another edge of another part.
Dialogue: 0,0:17:43.37,0:17:45.37,Default,,0000,0000,0000,,That 17.20.
Dialogue: 0,0:17:45.92,0:17:46.08,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:17:46.12,0:17:49.89,Default,,0000,0000,0000,,We also can notice here in the title block
Dialogue: 0,0:17:50.20,0:17:52.15,Default,,0000,0000,0000,,that material and finish
Dialogue: 0,0:17:52.52,0:17:54.63,Default,,0000,0000,0000,,don't make a lot of sense
Dialogue: 0,0:17:54.92,0:17:57.36,Default,,0000,0000,0000,,in an assembly drawing because the assembly is
Dialogue: 0,0:17:57.36,0:18:00.60,Default,,0000,0000,0000,,made up of various parts that all have potentially
Dialogue: 0,0:18:00.88,0:18:03.03,Default,,0000,0000,0000,,different materials and different finishes.
Dialogue: 0,0:18:03.36,0:18:05.51,Default,,0000,0000,0000,,And therefore, it is traditional
Dialogue: 0,0:18:05.84,0:18:06.95,Default,,0000,0000,0000,,and expected
Dialogue: 0,0:18:07.16,0:18:09.00,Default,,0000,0000,0000,,that those bits of information
Dialogue: 0,0:18:09.38,0:18:11.10,Default,,0000,0000,0000,,don't exist on the assembly drawing,
Dialogue: 0,0:18:11.14,0:18:13.50,Default,,0000,0000,0000,,but that the reader of the assembly drawing is
Dialogue: 0,0:18:14.75,0:18:16.68,Default,,0000,0000,0000,,encouraged or directed
Dialogue: 0,0:18:16.95,0:18:19.09,Default,,0000,0000,0000,,to the actual art drawings.
Dialogue: 0,0:18:19.39,0:18:19.67,Default,,0000,0000,0000,,All right,
Dialogue: 0,0:18:19.79,0:18:20.31,Default,,0000,0000,0000,,let's
Dialogue: 0,0:18:20.71,0:18:21.41,Default,,0000,0000,0000,,take 
Dialogue: 0,0:18:22.21,0:18:23.45,Default,,0000,0000,0000,,a look at,
Dialogue: 0,0:18:23.73,0:18:23.80,Default,,0000,0000,0000,,oh,
Dialogue: 0,0:18:23.93,0:18:26.44,Default,,0000,0000,0000,,that's the part that I just talked about right now.
Dialogue: 0,0:18:27.44,0:18:28.06,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:18:28.50,0:18:30.21,Default,,0000,0000,0000,,Now on to sheet 2.
Dialogue: 0,0:18:30.46,0:18:30.74,Default,,0000,0000,0000,,All right.
Dialogue: 0,0:18:30.94,0:18:31.97,Default,,0000,0000,0000,,For sheet 2,
Dialogue: 0,0:18:32.02,0:18:36.02,Default,,0000,0000,0000,,it's essential to realize that there is a new kind of auxiliary
Dialogue: 0,0:18:36.02,0:18:39.01,Default,,0000,0000,0000,,view that we're looking at now and it's called an exploded view.
Dialogue: 0,0:18:39.42,0:18:41.18,Default,,0000,0000,0000,,And the beauty of the exploded view
Dialogue: 0,0:18:42.41,0:18:45.32,Default,,0000,0000,0000,,is that it's broken up the part into all of its
Dialogue: 0,0:18:45.32,0:18:47.55,Default,,0000,0000,0000,,pieces so we can take a deeper look at them.
Dialogue: 0,0:18:47.92,0:18:48.17,Default,,0000,0000,0000,,Now,
Dialogue: 0,0:18:48.20,0:18:50.76,Default,,0000,0000,0000,,each of the parts has a callout balloon on it.
Dialogue: 0,0:18:51.03,0:18:55.74,Default,,0000,0000,0000,,And the callout balloon has a corresponding line in this table which
Dialogue: 0,0:18:55.74,0:18:59.49,Default,,0000,0000,0000,,is called the bill of materials or sometimes called the part list,
Dialogue: 0,0:18:59.50,0:19:01.50,Default,,0000,0000,0000,,but we will call it the bill of materials.
Dialogue: 0,0:19:01.62,0:19:03.44,Default,,0000,0000,0000,,Now, all of the objects
Dialogue: 0,0:19:03.82,0:19:04.77,Default,,0000,0000,0000,,in
Dialogue: 0,0:19:05.10,0:19:06.69,Default,,0000,0000,0000,,this particular assembly
Dialogue: 0,0:19:06.94,0:19:11.37,Default,,0000,0000,0000,,have a callout balloon and have a location in the bill of materials.
Dialogue: 0,0:19:11.50,0:19:15.66,Default,,0000,0000,0000,,Also, in the assembly drawing, we can notice the thing that's called the explode line.
Dialogue: 0,0:19:15.96,0:19:19.47,Default,,0000,0000,0000,,The explode line helps to understand that, for example,
Dialogue: 0,0:19:19.47,0:19:23.51,Default,,0000,0000,0000,,the bottom left the screw goes through that bottom cover
Dialogue: 0,0:19:23.96,0:19:25.23,Default,,0000,0000,0000,,through the circuit board
Dialogue: 0,0:19:25.64,0:19:26.11,Default,,0000,0000,0000,,through
Dialogue: 0,0:19:26.36,0:19:29.58,Default,,0000,0000,0000,,the membrane and up into the top cover,
Dialogue: 0,0:19:29.84,0:19:31.55,Default,,0000,0000,0000,,and it is an indication
Dialogue: 0,0:19:31.80,0:19:32.95,Default,,0000,0000,0000,,of how these
Dialogue: 0,0:19:33.28,0:19:35.39,Default,,0000,0000,0000,,parts line up with each other.
Dialogue: 0,0:19:35.76,0:19:35.96,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:19:36.01,0:19:38.20,Default,,0000,0000,0000,,We're now going to take a look at step, excuse me,
Dialogue: 0,0:19:38.35,0:19:39.16,Default,,0000,0000,0000,,sheet 3.
Dialogue: 0,0:19:39.46,0:19:40.75,Default,,0000,0000,0000,,And in sheet 3,
Dialogue: 0,0:19:40.96,0:19:41.87,Default,,0000,0000,0000,,we're going to see
Dialogue: 0,0:19:42.20,0:19:46.03,Default,,0000,0000,0000,,that a number of things are the same as they were in part drawings.
Dialogue: 0,0:19:46.47,0:19:46.87,Default,,0000,0000,0000,,For example,
Dialogue: 0,0:19:46.96,0:19:48.00,Default,,0000,0000,0000,,the section markers,
Dialogue: 0,0:19:48.08,0:19:49.04,Default,,0000,0000,0000,,the section views,
Dialogue: 0,0:19:49.16,0:19:50.08,Default,,0000,0000,0000,,the general nodes,
Dialogue: 0,0:19:50.20,0:19:51.36,Default,,0000,0000,0000,,the specific notes.
Dialogue: 0,0:19:52.14,0:19:53.61,Default,,0000,0000,0000,,But we now have a new thing
Dialogue: 0,0:19:53.84,0:19:57.24,Default,,0000,0000,0000,,that could have existed in a part drawing but it
Dialogue: 0,0:19:57.24,0:19:59.91,Default,,0000,0000,0000,,didn't exist in our part drawing for the turbocharger.
Dialogue: 0,0:19:59.96,0:20:01.11,Default,,0000,0000,0000,,It exists in this one,
Dialogue: 0,0:20:01.28,0:20:03.15,Default,,0000,0000,0000,,so I thought I'd take a second to talk about it
Dialogue: 0,0:20:03.32,0:20:05.11,Default,,0000,0000,0000,,and that is called the detail view.
Dialogue: 0,0:20:05.44,0:20:07.99,Default,,0000,0000,0000,,And a detail view is another auxiliary view
Dialogue: 0,0:20:08.28,0:20:11.28,Default,,0000,0000,0000,,and what it is is it's a zoomed in portion
Dialogue: 0,0:20:11.84,0:20:12.38,Default,,0000,0000,0000,,of
Dialogue: 0,0:20:12.59,0:20:16.82,Default,,0000,0000,0000,,the stuff that's inside the detail view marker.
Dialogue: 0,0:20:16.95,0:20:19.42,Default,,0000,0000,0000,,The detail view marker is that circular
Dialogue: 0,0:20:19.79,0:20:23.10,Default,,0000,0000,0000,,line that has two arrows on it pointing to a D, in this case,
Dialogue: 0,0:20:23.35,0:20:24.86,Default,,0000,0000,0000,,and that line is dashed.
Dialogue: 0,0:20:25.15,0:20:26.46,Default,,0000,0000,0000,,And that tells us
Dialogue: 0,0:20:26.79,0:20:29.98,Default,,0000,0000,0000,,that we're gonna zoom in on that area, and it's going to appear
Dialogue: 0,0:20:30.28,0:20:33.58,Default,,0000,0000,0000,,somewhere else on the drawing, and it's going to tell us something that is
Dialogue: 0,0:20:33.91,0:20:36.11,Default,,0000,0000,0000,,otherwise hard to look at at the size
Dialogue: 0,0:20:36.46,0:20:38.76,Default,,0000,0000,0000,,that it exists normally in the drawing.
Dialogue: 0,0:20:39.05,0:20:39.38,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:20:39.49,0:20:42.64,Default,,0000,0000,0000,,So, that's what you need to know about assembly drawings
Dialogue: 0,0:20:43.01,0:20:43.64,Default,,0000,0000,0000,,and
Dialogue: 0,0:20:44.05,0:20:46.56,Default,,0000,0000,0000,,what you need to know about part drawings.
Dialogue: 0,0:20:46.61,0:20:47.04,Default,,0000,0000,0000,,So,
Dialogue: 0,0:20:47.58,0:20:49.36,Default,,0000,0000,0000,,before we leave this whole topic,
Dialogue: 0,0:20:49.45,0:20:51.10,Default,,0000,0000,0000,,I think it's worth saying
Dialogue: 0,0:20:51.33,0:20:52.20,Default,,0000,0000,0000,,a few things.
Dialogue: 0,0:20:52.53,0:20:54.85,Default,,0000,0000,0000,,And item number 1 here is
Dialogue: 0,0:20:55.85,0:20:56.60,Default,,0000,0000,0000,,I hope
Dialogue: 0,0:20:56.83,0:20:59.86,Default,,0000,0000,0000,,that when you look at the engineering drawings, they won't look
Dialogue: 0,0:20:59.86,0:21:03.34,Default,,0000,0000,0000,,as daunting as they did before we had this small discussion.
Dialogue: 0,0:21:03.67,0:21:05.02,Default,,0000,0000,0000,,But what I hope mostly
Dialogue: 0,0:21:05.27,0:21:07.79,Default,,0000,0000,0000,,is that you'll actually look at the engineering drawings.
Dialogue: 0,0:21:08.17,0:21:10.85,Default,,0000,0000,0000,,You need to spend some time with the engineering drawings.
Dialogue: 0,0:21:10.92,0:21:11.33,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:21:11.37,0:21:14.25,Default,,0000,0000,0000,,I want to spend 5 to 10 minutes with each of the drawings.
Dialogue: 0,0:21:14.29,0:21:14.40,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:21:14.41,0:21:15.76,Default,,0000,0000,0000,,We want to examine
Dialogue: 0,0:21:16.13,0:21:16.60,Default,,0000,0000,0000,,each
Dialogue: 0,0:21:16.85,0:21:19.88,Default,,0000,0000,0000,,engineering drawing starting with the title block,
Dialogue: 0,0:21:20.13,0:21:21.32,Default,,0000,0000,0000,,then with the notes
Dialogue: 0,0:21:21.93,0:21:22.96,Default,,0000,0000,0000,,on page one.
Dialogue: 0,0:21:23.21,0:21:24.97,Default,,0000,0000,0000,,Then, we want to look at the views,
Dialogue: 0,0:21:25.18,0:21:28.26,Default,,0000,0000,0000,,try to understand what the views can tell us and why they're there.
Dialogue: 0,0:21:28.49,0:21:31.13,Default,,0000,0000,0000,,We want to try to envision the geometry.
Dialogue: 0,0:21:32.15,0:21:35.31,Default,,0000,0000,0000,,We want to do the same then for all those pages.
Dialogue: 0,0:21:35.72,0:21:37.42,Default,,0000,0000,0000,,And we wanna look for details
Dialogue: 0,0:21:37.72,0:21:42.65,Default,,0000,0000,0000,,such as specific dimensions or specific details that maybe
Dialogue: 0,0:21:42.65,0:21:44.64,Default,,0000,0000,0000,,in a detail view or in a section view.
Dialogue: 0,0:21:45.13,0:21:45.65,Default,,0000,0000,0000,,OK.
Dialogue: 0,0:21:45.86,0:21:47.57,Default,,0000,0000,0000,,Just as a final recap on here,
Dialogue: 0,0:21:47.58,0:21:48.61,Default,,0000,0000,0000,,we're after
Dialogue: 0,0:21:49.06,0:21:51.77,Default,,0000,0000,0000,,getting good at CAD fluency.
Dialogue: 0,0:21:51.90,0:21:57.17,Default,,0000,0000,0000,,CAD fluency starts by having a good understanding of why you need to create a model.
Dialogue: 0,0:21:57.54,0:22:01.21,Default,,0000,0000,0000,,That model understanding can come from a variety of places,
Dialogue: 0,0:22:01.43,0:22:03.22,Default,,0000,0000,0000,,including talking to a client
Dialogue: 0,0:22:03.50,0:22:04.09,Default,,0000,0000,0000,,or
Dialogue: 0,0:22:04.55,0:22:07.00,Default,,0000,0000,0000,,following a product development process for a given company.
Dialogue: 0,0:22:07.40,0:22:10.30,Default,,0000,0000,0000,,In this case, in this course, we're gonna
Dialogue: 0,0:22:10.30,0:22:13.08,Default,,0000,0000,0000,,have a number of exercises at the beginning here
Dialogue: 0,0:22:13.38,0:22:17.33,Default,,0000,0000,0000,,where you create geometry that's conveyed to you in an engineering drawing. So,
Dialogue: 0,0:22:17.33,0:22:20.96,Default,,0000,0000,0000,,you need to learn how to read those engineering drawings. And this video
Dialogue: 0,0:22:21.38,0:22:22.44,Default,,0000,0000,0000,,demystified them
Dialogue: 0,0:22:22.69,0:22:23.57,Default,,0000,0000,0000,,just a little bit
Dialogue: 0,0:22:23.81,0:22:25.68,Default,,0000,0000,0000,,hopefully making them less daunting,
Dialogue: 0,0:22:26.18,0:22:29.21,Default,,0000,0000,0000,,something you're willing to engage with and to actually read.