Sketch picture setup

Sketch picture setup


>>So in this tutorial, I’m going to
cover the basic steps, steps for setting up your orthographic sketches, which you
have scanned in and isolated in Photoshop for bringing those into SolidWorks, so that you can start working
with them in a 3-D view. So I’ve got a new part here and the
orthographic sketches that I have are just for the simple sketches for the side and top. So I’m going to start with a side view here,
see them going to select my right plane, click the normal orientation,
so I’m giving it head on. And, then I’m going to start a sketch
and you may not have this sketch pitcher, sketch feature already
available in your toolbar, so let me just show you how
to get that if it’s not there. Go up to your tools menu, customize and
under commands, these are all the commands in SolidWorks which you can drag to the
various toolbars and so I’m going to go to sketch and the sketch
pitcher command is here. So let’s say, I do not have this here
before, I could just take this and drag it up to my sketch toolbar so that it is one
of the tools I have available up there. So again, the command we want a
sketch picture and what this does is, it allows you to take a bitmap that you have
on your computer and put it into the sketch as kind of a background drawing,
so we are going to click that. It’s also available in the menu here,
let’s see, tools, sketch, tools, and you can’t see it on the screen here,
but it is down at the bottom sketch picture. Anyhow, sketch picture, they’ll
give you an open dialog box, I’m going to select my
side drawing, select open. Okay, so the first thing you notice is
that it’s huge because I had scanned it in that I think at 300 dpi, which
is going to create, let’s see it, it looks like it’s default thing to being
624 millimeters high, which is you know, half a meter high, which is
way bigger than what we want. So the first step we have to, well when
we back up, the first thing we want to do is rotate this because we are
supposed to be looking at a side view and the top plane is going like this. So I wanted to actually be rotating
90 degrees, some going to go over here and rotate the, rotate the picture. Okay that ended up rotating it in the
wrong direction, some actually going to 270 instead, which is 360 degrees minus
90 degrees to rotate in the other direction, whoops, let me get back into the 270,
okay so that’s more like what we want. All right, so in order to scale the sketch
picture correctly, I’m actually going to get out of the sketch picture. I’m still in the sketch itself,
I’m still in the sketch mode, but I’m not editing sketch
picture itself at this point. And, what I’m going to do is just draw
a rectangle that approximates the size of the part that I’m going to be modeling. So let me just do this. And, when I did this sketch, I figured
that maybe the remote control was about 6 centimeters long total, so what
I’m going to do is use my dimensioning tool to dimension this rectangle,
so that it is about that long. So 6 centimeters would be 60 millimeters. So obviously the rectangle is
far too large at this point, so I’m just going to type in 60 here. And, clearly it’s too tall, so I’m going
to get out of my dimensioning tool and get about the aspect ratio that I want. So that’s how big the side
sketch should be approximately. So now that I have this rectangle as
a guide, I’m going to double click on my sketch picture, which
allows me to edit it and making sure the locked
aspect ratio is checked, meaning that I can’t distort the
sketch in one direction or another. I’m just going to drag it in, so that
it’s about the same size as the rectangle. We’ll zoom up here and
I’m going to position it, so that the width is about
right for the length. So that’s looking pretty good. I’m not so concerned with the height
because the height is going to be defined by the width really, I’m sorry by the length. If I have the length at 6 centimeters, then
it turns out the height is going to be, well this much, so we can, the
positioning looks okay there. Let me just think about, you know
actually I think I want to position, a position the sketch, so that the fattest
part is on the, is on the Z axis here, so I’m going to position it up like this. This will make more sense when
we go in edit the top view. Okay, so that looks fine and then the height
of my rectangle really doesn’t matter, it’s more the width that I was
concerned with, but I could do this. Let’s get my dimension
back where we can see it. Okay, so let’s leave side view alone for
now, let’s exit the sketch and I’m going to name this sketch side ortho. You can see under this sketch, the
sketch picture one is actually my, the bitmap that I had it reported in. So that’s what the side view looks like. Now let’s do the top view, which is
going to be on the top plain here. Again I’m going to start a sketch on the
top plane, select my view normal to it, select my sketch picture command and
I’m going to bring in the top view. So again this is extremely large, zoom out and try to get this back
down to the size that I want. Now I can see, whoops, I can see my side
view, this rectangle is still visible, and that’s going to help me
size the top view as well, so just to make this a little bit easier to
see I’m going to sketch another rectangle. [ Silence ] And, what I’m going to do is, I’m going
to make sure that this point on the top of the side rectangle intersects with the
midpoint of the top edge of my new rectangle. So I’m going to use a midpoint
relation to do that. And, then I just need to make sure that
the origin here, the bottom intersects with the bottom edge of my
rectangle, so either midpoint or coincident it will work your,
I’m just going to do coincident. So now what I have is another rectangle
that kind of did fine for the length of my top view in this direction and
then the width will be determined by the ratio of the length to the width. So again I will double click on my
sketch here, I’m going to bring it over, I can still see the center construction line
on my original sketch, so I’m going to line up with the Center of this sketch
here putting it on the origin, looks like it needs to be a little smaller. [ Silence ] okay, that looks about right. And, then just to see how wide my piece is
going to be, I’m going to bring the rectangle in and then I can use my dimensioning tool. So it looks like it’s, let’s just
call it an even 31 millimeters, looks like with a height, with
a length here of 6 centimeters, the width is going to be
just over 3 centimeters. Okay, so now I’ve got both the top,
let me finish up my top sketch here. I’m going to exit the sketch and
I’m going to rename it to top ortho. So, excuse me, now I’ve got these
sketches in place that can provide a guide for when I’m actually starting
to draft out the 3-D model. Now one thing to notice is it’s, it can
be, if I were to start modeling here, the sketch would actually start
obscuring what I’m trying to work on. So one last thing we are going to do is I’m
going to go to each of these sketch pictures, double-click on the first one and
I’m going to add some transparency. So down here in the transparency options
there are several options here, the quickest and most useful for this purpose
is going to be full image. And, I’m just going to
select about 80% transparent, so it allows me to see through the sketch. I’ll do the same thing with sketch
picture to here, full image, set the transparency up to 80 okay. So when I start modeling now I’ll be
able to see better what I’m doing. Now if I had a front or back sketch
I could use the same procedure and I’d probably choose to put
it on the front plain here. In this case, I only have
the top and side sketches so that’s orthographic sketches,
so that’s not necessary.

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