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Cross Pendant CAD Modeling in Rhino 6: Jewelry CAD Design Tutorial #82


Hello everyone welcome back to PJ Chen Design.
Today we aren’t going to talk about this 2-tone cross, and the most
easy way to make this illusion of crossing over type of the design. Are you
ready? Let’s get started This video is not including the stone
setting part. As I have been talked about this in my other videos. If
you like to check out the detail on all type of a stone settings, you can check
out my course. It’s online, I will also put the link at the description below.
Let’s take a look on how to model the cross, because it is actually coming all
kind of proportion. I don’t really have a specific one in mind, but I’m just
gonna draw some sort of reference for me to start with. So what I do first is I
need to start drawing a line, I’m going to use the arc tool, and snapping into
this end point, and end point, and you want to come over, and cross that point
over there. As you can see, I’m going to have another one cross over here, so we
are going to draw another one snapping into the end point, and come over
something like that. If that is not something that you like, you do need to
move them up and down. You can actually edit your control points to move it to
the desired place that you have. Once we have this one, I’m going to use in the
mirror command, and move it to the other side, and double check, if that is a
proportion and everything that you like. For example I may want to have those two
point going just up a little bit, so it’s more central there. Once we have
this, we are going to create the profile. I’m not building the model in certain type of a proportion, but you also need to make
sure that the casting will survive. You cannot go too thin under certain
type of a design. So the best way to do is drawing the profile on this side. As many of you probably already know I like to use
conic corners on the rectangle. Right click on this icon. I’m going to start
drawing something like this. So it is more of the cushion there. In order to
snip it correctly into my cross, I’m going to find out where’s the center.
What you can do is you can first get a line right there and put the dot right
at the midpoint. That’s one way to do it. The other way to do it. We can go into
the analyze and you have mass property, and then you area click on the area
centroid, then you click on this curve. It will give you a dot right in the
middle, so let’s go ahead to group them. The second one. This is the first curve
that we have, which is the middle profile. It’s going to be thicker. I’m just simply
going to make a copy with the gumball, and make it slightly smaller, and that will
be the end. So what we’re going to do is we’re gonna make a bunch of copies. I’m
going to use the copy command and I’m gonna select this group for a
smaller one, and let’s snapping into the point right at the center, and we’re
gonna make the copy on all the end there. so and here, here, and here. At
this point we don’t really worry about the orientation yet. We’ll change
it later. The second one we also gonna make a copy, so I’m going to have one
over here. Which is this one. It is gonna go a little bit higher. Any part of the
higher one, you want to have it right in the middle and then the other one
probably will be somewhere around here. and somewhere around here. I just
go ahead and change the color in red. It is easier for you to see. Let’s go take
a look on the top view. Very important part is we need to make sure that all
the cross section is 90 degrees toward to the sweep direction roughly. It doesn’t
have to be super 90-degree, but we want to get something like this. So kind of
using the gumball to change the direction for all of them, and the one on the top
and the bottom. I actually want to have them 90 degrees exact. So what I do is I
use a Gumball, and arc, and hold my SHIFT command, so they will be 100 percent
90-degree to the construction plane. Now we have something like this, we
probably want to think about when this coming over here, it might be touching. If
you want to set the stone, you might need to move this one in a little bit, so at
least, you will have some room for the stone setting, or something like that.
We could move this out a little bit, and the same or moving this guy out a little
bit. Alright so now we have everything set up, we are going to use the Sweep 1
command so sweep one and make sure every time you have Record History is
on. So we want to Record History as well. The first one let’s do this one. This is
it’s going to be your rail, cross-section, and it tells it is unable to
order the shape on the rail, and there is nothing wrong. this is a rail this is
cross section. So the things you might experience is you have been grouping
this dot or this point to this circle. So then the computer have no idea what that
is. All we need to do is ungroup. So
let’s do one more time. Sweep 1 rail. We’re gonna go from this one, to this one,
to this one. And make sure they all align correctly. I like them to align to the
place I don’t see as much, so I want them to align to the bottom. Make sure Record
History is on. So we get our first one. and we want to do the same to the rest
of it. Now we have it’s done. We can now to edit
a little bit. For example, we can move. Since we have a record history, we’re
gonna move this up a little bit. So that will give us this really nice curve here.
If you like it have a more solid, we can go ahead to select
those control point over there, and bring this down to the bottom, so that way you
will have it solid all the way to the bottom It kind of giving you two
options to have. The second one. We also want this one going up a little bit, or
something like this. Let’s take a look on the top view. If you come over to
the top view, and then you look at it, you feel like okay you need more space. You
can also move this one up a little bit. Or something like that to change the
gap that you have in the middle. After that, all you need to do is put the
stone right in the middle. Make sure they all have a good contact, so you have a
better casting. I hope you enjoyed the tutorial today. If you’d like to know
more about a stone setting. Don’t forget to click the link below. That has a whole
class with a bunch of different type of a stone setting for you. Thank you for
watching please subscribe it. Don’t forget to click on the little bell, so
you will get the notification whenever I have the new one coming up. Thank you and
see you next!

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