Hello everyone welcome back to PJ's CAD class, as an authorized Rhino trainer
I'd like to do everything in Rhino 3D software that possible. In jewelry industry
you have Rhino plug-in professional software like GemVision Matrix and
RhinoGold. People often ask me why don't you just use them instead of
building everything from scratch in Rhino 3D. There are two reasons for it.
I personally use RhinoGold for my jewelry design since there are a lot of good
features for quick stone setting model but for many start-up designer both
programs may be a big investment to start with. Second if you know how to build a
model from scratch you don't have to limit yourself design from the library
those two professional jewelry program has. So long story short, learn the
fundamental model concept may take longer time on your learning path but
you will be benefits to you in the long run for your CAD designer career. What
I'd like to show you today is build this engagement ring that is really popular form
in lot of a commercial jewelry. And then, we're gonna build a six prong heat and
building this little bridging in the middle, and also build the ring shank
with a open on the top, and finally we're gonna add this little bead setting diamonds
all the way around on both sides. The video might take too long to finish for
just one (video) so I would like to separate this video in two parts. Just in case
you're wondering what kind of display view I'm using. If you go into this
little triangle right here. and you will see artistic and this is the view I'm
using. I usually use the ghost view. Are you ready? Let's get started.
Let's start with this 5 millimeter round stone and then for how to make this
stone you can go on the right top corner there and then you will see the info (icon)
there will be a link for my previous video. Alright so we want to do a six
prong (head) on it. First of all, we want to decide what type of prong size. You can
do the round one but the one that I have is more of the cushion looking, so I want
to decided the the prong, I want to snapping into the grid, so I turn on
the grid snap on the bottom. and then let's do from the center right there, you
can decide whatever size you want it that since I'm planning to have a six
prongs, and this is it's not super big of the stone. so I wanted to do is more like
a 1mm. So I'm going to type "1" here, and also type "1". Now you
can choose to have the "corner", you have to choices here right here you have a
corner is "arc". Or there's another very interest one it's called "conic" and what
it does is give you a little bit more of the cushion (look) Let's go to conic and it
give you a little bit more of a cushion looking, and I really like this shape
right there alright so we have the prong right there
Now the prong is going to over the girdle. Ideally, you don't want it to be
too short but you don't want to be too long. There are actually two type of
models- for rendering purpose and for CAD, which you are going for casting purpose
For the casting purpose, you want to leave it a little bit longer so your
jeweler will have some room to bend the metal over. Okay, so let me move this in
a little bit. You can moving 30 percent 40 percent or even more like 50 percent
of entire area, but definitely not over 50% because you're gonna make your prong
really weak. I usually do in between 30 to 40 (%). Okay so that's the profile for
the prong, and then I need to know what is the shape going to the bottom you
want them to have the same (shape/size) I'm going to use the Gumball. Drag it and tap my ALT key so
then you will have a copy there and I'm going to flip it 90 degree right there.
Okay so you don't want the metal to touch the culet which is this point part
of the stone, and then only close to the middle as possible. Okay, now we wanted to
have a shape, profile for the shape, and depends on how you like it there are
a couple way to do it you can just go ahead to you know draw the shape that
you like. Something like this, from quad to quad, so at the perspective you
can see they are (look) like this. Or you can do is putting two little tabs, so once here and
one here, and then you can use the blend tool "blend curve" which is right here
and then you blend from here to here so I kind of giving you different kind of
profile, and you can adjust it. Okay, that way is when you have the prong on the
other side it will blend better. Let's click OK.
Alright, so now you can delete those two tabs. Let's take a look on the
perspective view. So we have this we can do is using the "sweep 1 rail" and this
is the rail, cross, cross section. and then you hit ENTER, then you will get that
prong there. So next step, we need to make sure it is solid, so we want to do
is type a "cap" C-A-P, then I will have a cap. Now it doesn't look too nice for the
rendering, if you have really sharp edges. so let's go ahead to fillet the edges, so
let's go to fillet, and then radius, let's type it 0.2. Maybe, let's give it a
try Alright, so it looked nice over there
Alright I'd like to do six prongs. Two ways you can do it. You can use
the "polar array" which might be faster or you can use rotate with the copy=YES.
Let's try the "polar array". It's living under the "transform" and you have "array"
you have "polar". Okay, so I want to type it -center is at "0" and I want six of them,
and 360 degree, so I will have this prong set. Alright, if you like everything
everything look nice to you just go ahead and Boolean (unit) all of them at once.
Alright so now we have our head. It's done.
It depends on the orientation that you have, in this case, I would like to
have it rotating 90 degree. I'm sorry it's 30 degree, so that way it will
have two prongs touching the shank, which is more stable than one prong
touching. Okay, alright so now that's starting working on the ring shank.
I'm going to draw a circle and like most of my demonstration the diameter is
going to be 16. Alright and then I'm going to move this one above the circle.
and that's where the prong is going to be. Now let's take a look on the
perspective. Alright this is what we have there the next step what we're
going to do is creating a shank. On the original one you can see I have this
open on the top, and what I did is.... actually I need to draw the curve first.
I'm going to create another layer so it's not blocking and I'm going to call
the first layer "head", the second layer I'm going to call it
"ring shank". Alright, so I'm gonna send this circle to the ring shank . and I
gonna turn the "head" (layer) off, so it is easier for us to take a look. alright, so the
first things I would like to do is creating the "arc", and they can be
anywhere but make sure that you want it to almost touching the center. Okay I'm
holding the SHIFT (key) so I can get the half circle that's the arc. The second
things I'm going to do is I'm gonna put another little tab here.
Alright, so instead of drawing the curve, and this might be too fat, instead
of drawing a curve, I'm going to use the blend tool, so we're gonna use the "blend"
It is living under icon here and then you're gonna blend from here to here.
Alright so you may have something that I have here. Now let's take a look on the
perspective (view) that's because the original two tab they are not on the same place.
To fix this problem, you just need to pick up the curve you want them to be
flatten to the Cplane. and you type "ProjectToCplane". We want to delete
the original one, yes, and then now if you look at a perspective there are both on
the Cplane okay so let's do it again using the blend tool. I'm gonna blend from
here to here and it looks alright to me let's click OK. Alright so I have that
one, and since it's gonna be symmetrical, so I just need to copy to the other side.
and kind of joining it. Alright so the question is how am I gonna get this
curve follow the ring shank. The command we are going to use is called
"Curve from 2 views". Its living under the "Curve" command, and then you pick up this curve,
and this curve and very quickly you see this curve. I gonna turn this in
the red colors and it's easier for you to see. Okay once we have it, we only need
the top part. We don't need the bottom part. So I'm gonna use this curve to trim the
bottom part, so now I have this one on the top okay
Since it's gonna be symmetrical you can mirror to the other side but I don't
want to me or everything to the other side (yet) I want to finish one side and then
mirror to the other side. Okay now let's take a look on this top view. Now we need
to make it into the solid, right? So we need to create some sort of profile.
Let's starting creating the profile to make it solid. I'm going to use the
rectangular tool and then choose the "center" so I'm snapping into the quadrant
right there. I'm going to use the 1.2 mm stone, so as long as you
are bigger than 1.2 mm and leaving some room for the prongs, then
you will be fine. You don't want it to be too thick but you don't want to be too
thin either, I'm going to have it as about over 1.5 millimeters thick and
roughly about 1.8 millimeter and I'm using the corner for "conic" so
you can have this cushion looking surface, I'm sorry- cushion looking corner.
so that's moving this from the midpoint to the quadrant, so you're not cutting
inside of a ring size. Alright now I need to move this in a little bit to the
center line. so I can make sure that I can overlapping them. and I'm gonna use
the "mirror" to mirror to the other side. Alright, so let's take a look on the
perspective (view). Alright this will be the profile for the "sweep 1". Let's do
"sweep 1". this is the rail you go from here to here, and then you got this surface there.
it looks alright let's take a look on the top. It doesn't (get) over the middle. Let's take
a look on the stone. It's kind of cut into the prong maybe too much, because I
do need to have stones over there, so let's do a little bit of adjustment. Let's
delete this one, and we want to delete the red one, because you have so many
control point. It's hard for you to do the Edit by just dragging the control
points, so we want to edit the original one. So let's pick up all the point that
you're going to move. And let's drag it back a little bit. you don't have to drag
it way too much. We just need it to be shorter so there will be a gap there.
Let's take a look on the "curve" (menu) when you have "curve from 2 view". This curve and
that curve. okay it looked like it has a good shape, but let's take a
look first. "Sweep1", cross-section, and look like it's alright.
okay so now we have this one and again just not confusing. I'm going to use this
original one to trim of the bottom curve. Alright so now that one look okay. It is
touching the center stone. Let's take a look how do we create a bottom
one. I'm going to have this curve and going to copy that curve, snapping into
the quadrant to the quadrant of my ring shank. Alright and our front view
has a little profile right there. and we are going to use the "rotate" tool to
rotate it 90 degree. Alright then let me go back to the perspective and that's
hide that one
so we need to have those two profiles sweep to the bottom, so you will have
a very nice blend, and so we need to make that two into one. Let's go ahead and
trim off those two and while they are select, let's join them, and don't forget
to mirror that to the other side
all right now it's time to do the sweep again. Let's go to "sweep1" and you will
go from here to here to here. Usually I like it to align to the center of
inside of the ring shank, and make sure that they are
pointing the same direction. so I'm gonna go this one for in the same direction
and let's take a look. Alright, blend it really well. It's tapered down
to the bottom and let's turn on the par we just did. Alright,
it looks really nice as well. Let's go ahead to mirror that surface to the
other side of the ring. and lets joining together so now you become solid
all we need to do now is building a little bridge there so it's more comfortable on
the finger. So I'm gonna use the bottom profile again on my front view
and then I'm going to rotate it to somewhere inside of that shape. Okay I'm
going to turn into the red color it's easier for you to see. Let's take a look
on the perspective (view)
now you see the profile right there, and we can create a bridge, but I do not want
the bridge is too fat. so I actually want to scale 1D down. So let's go to "scale"
tool use "scale 1D" snapping into the quadrant to the quadrant, and it's kind of
bring it down. So make sure the bottom is still stay on the shank. Let's go
ahead to mirror this guy to the other side okay
so all we need to do again it's going to be "sweep 1". This is my rail and I'm
going to sweep from this curve to this curve. Okay so now we have something on
the bottom for our heat to sit on. so that way you don't have to be realized
on the head to holding the shank and don't forget to cap this one because
that's only a surface, open surface, and for aesthetic purpose I might need to move
the head just a little bit up. Alright so I have definitely enough room for my
stone to run through. Alright, so that's the basic ring shank that
we have.... Wait minute, I see this surface in between, and it is okay for
the rendering but not too okay when you wanted to print it. So
Let's fixed that. Let me turn the head off all right so I don't know if you see
what I see there, but it's it's overlapping surface, so we need to trim
that. If you want to.... let's explode it. so back to this part and separately. All the
bottom we can join back together. They don't have problem okay
so I'm going to hide this one, so you probably will see better what I mean
there. Because we overlapping the the profile a little bit so you got
double surface there right. if you say I'm going to trim this guy.
I want to trim. It doesn't let you trim, right? so it doesn't work, so the way to do this
you have to split your model first. Let's take a look on the top view and
that's draw a curve, like the across our model, on the top view. I'm going to use
this curve to split the them into four different pieces so that's use the
"split". Those two will be split by this curve, so now you have multiple pieces
,right? and we no longer need those small ones, so we can just go ahead and delete
that small one. Oops, this one, and also we can delete it. All we need to do now is joining
those pieces back together. Alright, and then let's take a look on the bottom.
Just turn back the bottom, and let's join those together. Alright, now
in our properties says right here is a "closed solid polished surface" so which
is good. With this one, and this one, that's also "boolean" it together, and then
double check again. it's closed solid polysurface. Alright,
so let's go back and turn on the head there. Alright, I don't want to join a
head yet because I might need to have a completely surface to do my stone next
Alright so this is the basic shape of this ring so next step we are going to
do the bead setting on the ring shank all the way around. So stay tuned
It will coming up for the following Monday. I hope you enjoy the video please
like and comment and share my video. It takes really long
time. Roughly about 5 hours to make a 15 minutes video. So your help on sharing
and also comment is helping me ranking on YouTube. Thank you for watching see
you next Monday
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