# Faceted Ring Band 3D Modeling in Rhino 6 (2018)- Jewelry CAD Design Tutorial #38

Hello everyone welcome back to PJ Chen
Design channel. This channel is about sharing Rhino3D knowledge to students
and professionals learning various Rhino3D techniques. What we like to do
today is it’s actually a math question instead of the model question. The model
is not too complicated, but we need to do some math to calculate correct facets.
Are you ready? let’s get started. If you search for the Google, you can see
a lot of facet rings. A lot of time, they are computer made so the each of the
facet is really equal size. However, you also see some of the design like this.
This type of a design usually is hand carved. so it’s spontaneous to carve out the facets, so they they are one-of-a-kind in
the way, that it’s hard to repeat the facets unless you making a rubber mold. What we like to do today is more of a uniform look, a more of like machine
cut look. And so that way we can use the math to calculate. So let’s go back to
Rhino. You can see each of the facet is almost an equal size, and depends on
the cutting tool that you have, they could be different sizes. so that’s
starting with making ring band first. Again let’s set up the ring size for 16
millimeter, in the diameter typing 16 here. And I would like to use
the profile for my ring. It’s going to be something like half round wire, so I do
not want to set it up for like the two wide. This is a man’s ring, so I think
somewhere in between 6-8 millimeter It’s a good size and then let’s
move down the control points to make it a little bit shallower.
or you don’t want to make it too shallow. because you actually need to cut out the
material, so let’s make it something like this. It’s roughly about 2.5 (mm)
or you can make it just a little bit taller since we’re gonna cut out some
material. okay and then next what we would like to do is closing this curve. And
let’s join together. To make it into the ring band, we’re gonna use the command
living under the surface, you have “sweep 1 rail”. and then this is the rail, this
is the cross section, and then you will get the ring like this. So this is the
basic ring that we’re going to cut it off. Okay the second step that we are
going to do is to create solid. Even though it’s not align right in the
center, that’s alright. And we just need to pick up both of the solid, then using
the align tool. Type it 0, so they will be perfect aligned. And we just need to use
the gumball to move up this guy here. depends on how big of the surface you
want to cut it off. we can do is doing a test. Let’s look at the
front view, and let’s use the “polar array” pick up this object, and we use the
“center”, type at 0, and let’s try it for 12 and see what does it look like. Allright
so look like it’s overlapping a little bit, so our new facet is
pretty big that’s let’s try the boolean (difference) and see how they actually look. so now we
are going to use the “boolean difference” and this is the object, and those are the
cutting tool. so the first one we cut it out is something like this, actually
they look nice to me. so I’m going to use this facet right here. If you want the
facet to be smaller. When you are doing the polar array, you might want to increase
the number. Okay the second one I’m going to do again
I’m going to creating a solid and using the align tool, align to the center,
type it zero, so you have that one there now I’m going to move this one up a
little bit and since I am going to keep it half round, so I’m gonna move it here,
and tilt it to follow my round surface. and have it come down there. If
we go ahead and cut this. It doesn’t have the look that we’re looking
for, so actually I need to rotate this guy we were having 12 section, which 360
degree divided by 12. it’s 30 degree. So I want to cut it in between.
That means I need to rotate my cutter to be 15 degrees. so I’m gonna type it here
15, so that will be my cutter. Let me mirror to the other side. Let’s do a test now just using the boolean tool. This
will be boolean (difference) all of these, so then you get this surface. It looks really nice
over there. so I’m gonna to go back one more step, and have this one to be a
polar array for 12 of them. Center type in “0”. 12 of them is something like this.
okay let’s go ahead to boolean this one and then mirror to the other side like
that one. Alright so those are going to be our cutting tool. it looked a little
bit complicated, but if you follow these steps, is actually the math questions. So
let’s go ahead to boolean difference. This is the ring that we want to be cut,
and this is our cutting tool. Then we will get this beautiful facet there.
Alright so I think I would like to cut one more time, because I have it all
Faceted, but where close to the side it is still rounded. so I’m gonna do the
same thing one more time. Let’s bring up another solid and again let’s go ahead
to align to the center This time let’s move it this up. We want
it to be really tilted almost like this way, and then we wanted to come in down
here. Alright I do not need to rotate it because we only need to
rotate it the second row. Alright so let’s do a test cut. I’m going to boolean
difference this out of this, so you got that little cut. I actually would like to
have it cut it a little bit more, and actually taper a little bit more.
something like this. so let’s do another test cut alright it look like really
nice facet there. so let me repeating the process we were
doing twice. Polar array, type in zero as our Center. Again we want to use 12 of
them, and then we want a boolean unit this one first. Let’s go ahead to mirror
to the other side. Alright so let’s using the bowling difference one more
time. This is our ring, and we are gonna cut out from those two. So we’ll get this
beautiful facet, and look really uniform. so this is the tutorial today for making
a men’s facet ring band. I hope you enjoyed. Please like and comment and
share my video. I especially want to thanks my subscribers who are constantly
leaving the comment on each of my video that really helped me on my YouTube
ranking, so I can reach more people thank you, and I will see you next Monday!

## 5 thoughts on “Faceted Ring Band 3D Modeling in Rhino 6 (2018)- Jewelry CAD Design Tutorial #38”

1. Abeeb Olaniyi says:

My confidence in rhino keeps growing every time I watch and practice your tutorial. Thank you PJ.

2. MasterMinded says:

You a great teacher! Hahaha i like your accent tho 😅 great work 👏🏾

3. MasterMinded says:

Is there a way to see how my work will look before you really apply it on your work like with the Boolean difference? Or do I really have to apply it and than control Z to rectify it? Thank you coach pj!

4. prithvi raj gond says:

Thanks for giving new ideas.