Hello everyone welcome back to PJ Chen Design Channel. Today we want to talk
about this four prong setting, and how we actually can split this prong from the
ring shank to get this type of setting. Are you ready? Let's get started.
Let's start bringing in the stone. If you want to know how to model this stone. I
have a video here. I'm going to put a link on the top right. After you
finish the stone, bring in the stone and that's decides the ring size. As most of
my demonstration, I'm going to have ring size diameters setting 16 for the demo
today. And then you want to decide how tall you want to have on the stone. If
you have the stone under seven millimeter, it is still a comfortable
height, so let's set it up somewhere around there, and also depends on the
size of a stone, you might need to move up and down a little bit okay.
So let's take a look on the front view. We are going to draw a curve and this
curve is kind of starting from here. I gotta have it just a little bit longer.
It's because I need to print this one eventually, and then we're gonna draw a
curve right there. You can draw the curve like this way, or another way I
like to do is I will draw a straight line roughly right here, and I'll draw
another line from the quadrant down. So in between, instead of drawing a
line, I'm going to use the command it's called Blend. I'm going to Blend
from this end to this end. So you give me a very nice curve there, and I
can move this up and down to decide it. if I wanted to you know changing the
curve, and if I do like the blend, and that will be our curve. After I do
that and I'm going to actually I'm actually going to move it down a little
bit here, and this one, I'm gonna move it up just a little bit, so that way we'll
tuck in little bit more. Then we no longer need this one, and we
no longer need this one. Then we have a curve over there. You can also keep
adjusting until you feel like that's the curve that you want. It maybe a little
bit higher like that. Okay so that's the first curve that we have. The second
curve we are going to look at the side view. Alright so we have the curve I'm
gonna draw another curve on the side view, and using the smart track to
snapping into the endpoint of the first curve that we drew. And I'm gonna start
it about right here. This curve is going to come in like this way, and end
it where in the quadrant, and then again you can adjust this curve, if that is not
as ideal so you wanted to have. so let's kind of moving here there a little bit
to get the perfect curve that we want. Okay so that is going to be the
splitting angle, and let's take a look on what we have over here. Look like this
curve we just drew on the second one seems snapping into this quadrant over there.
so let's go back to the right view, and we're gonna use the commands called
Project to CPlane, and we want to delete the input, so go back to
perspective. You're going to see that one is sticking into the construction plane.
We're going to use the comments Curve From 2 View, and make
sure you record the history, and we're gonna click here and here. That would
generate this view. Notice that this is not touching my stone here. I
mean I need to change the curve, so instead of changing that one, I'm going
to actually moving this one, and because I record history, so everything else will
be following. Now I need to move it in other direction, so I'm going to move
this one and this one, coming in just a little bit. so that will touch my stone,
then this will be the curve that we are going to use. Next step that what we are
going to do is we need to creating the profile for sweep. so I'm going to use
the Conic Corner, and snapping into the end
point right there, and create a profile something like this. I would like to
moving this profile from the midpoint back to the quadrant. So they will be
there. Let's make a copy using the copy command, and we want snapping into this
end right here, to the top over here. You may want to adjust it. You want to
actually make sure that the prong is not too big. That is somewhere there cut into
the stone. So that's the position that you want. I might want to have it
just a little bit wider over there. It's really depends on your design. Let's use
a sweep one rail. This is gonna be our rail. This is the cross-section, and make
sure that you align everything, so I wanna align everything in the middle
inside, and let's get one of this here. So, to have the cap you can have
the cap on the top, or you can use the command right here it's called Patch, and
then you can pick up the surface segment and then you hit ENTER, then you will
have something a little bit round there. Okay so let's joined this together, so
that will be one. The rest of it is quite simple, so we are going to Mirror that
one to the other side. Let's go ahead to do something like this okay. So then we
have this open in there, and again if it is just for rendering purpose, you might
want to make it a little bit shorter. That will look nicer. If you
wanna cast, always leave some extra room so that way your jeweler will have enough
space to do the setting. Okay so this is what we have over there, and then we can
go ahead to make sure you CAP all of them, so now they all become solid and we
also wanted to mirror that curve to the other side like this, and the bottom
of the shank. What we can do is sweep one rail and this is
the rail you go cross section from here to here, and make sure that this is
personal preference. I always like to have the seam inside of the ring, and then
that will be the bottom half. Make sure you CAP it again, so that way
we can Boolean in a minute. The next step, we need to do is to
build a bridge around it. You may not able to have this setting just like that
it will pop it open really quick. So what I like to do is to pick up those
two profile and make a copy and scale it down just a little bit short like this.
and let's take a sweep and see how we go. So we're gonna do Sweep 1 Rail.
and this is the rail, and we're gonna pick up the profile that we have. That's
a rail. Let's the cross section one, and cross section two, and make sure you have
to the center, and then that's how we get this part here okay. And again make sure
you CAP it. Then we can boolean later. Alright and then I want to do a
little bit design on the side, so what we gonna do is we go to the front view and
we can draw our design right there. Simply let's go ahead to just do
something like this coming down to the middle part. Alright and then again you
can adjust the control point to make sure that fit whatever the design that
you want. Now let's take a look at the perspective and again you might snapping
into somewhere, so at the front view we are going to use a ProjectToCPlane.
And you hit yes and then so that will be a flat to the
construction plane. Okay so after draw this one we are going to use the same
command that we use before. It's Curve from 2 View, and we're going to
starting with this one and this one, and so that gives us this curve over there.
With this curve, I'm simply just gonna Pipe it. So let's go ahead to use the
Pipe tool, and we're gonna pipe it somewhere about this about this size.
Okay so then we have one part over there, and you can tilt it a little bit to make
sure that they are intersect really well and we can kind of a moving maybe just a
little bit there. Alright so again we can have this one on the top view we're
going to use the Mirror. and with the Mirror to the other side in this one we
Mirror to the other side as well. okay so that will be our design over
there. Let me turn on the stone so that way you will see better and make sure
that my stone might be like cutting too much in there. Maybe I want to have this
just a little bit lower so it's not cutting into my stone. so that will help
the structure to hold a stone better. I hope you enjoy the tutorial today. Please
comment and share and like my videos so it help my ranking to help other people to
see my Rhino tutorial like you do. Thank you and I will see you next!