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!