Indoor, Outdoor & Kids' Trampolines

How to 3D Model a Rope/Braided Ring Band (Part II): Rhino 3D Jewelry CAD Tutorial #68 (2019)


Hello everybody. Welcome back to PJ Chen Design today. What we’re gonna do is finish up this ring band from last
video. Are you ready let’s get started! Last video, we were finishing up this rope
type of design on two sides, and today we’re gonna talk about the braided
design in the middle. If you want to find out the video. It is on the right top
corner, you were able to find a video link over there. so back to what we have
here, we kind of need to understand the structure first. If we look at this
pattern right here. It looks like it is falling into some sort of a square, and
it has kind of a v-shape coming up. One is lower, one is higher. Once you create
one, then you repeat multiple of them. Alright so we’re gonna come over here on
our flat, so we can make any thickness that we want. I’m going to snap into the
midpoint, and just draw a rectangle. You want to draw a little bit longer than
what you have, so we have enough to trim. We gonna rotate it 45 degrees. Let
me move this back to the center, so that’s the first one. The second one, we
are simply just going to mirror to the other side, so we have this pattern here.
Notice one has to go up one has to go down, so those will be the line that we
are going to sweep. Let’s explode, and we don’t need those small line there.
Shorter lines here, so I’m just gonna delete this. Okay, so we are going to
create our first cross section, you can design the cross section that you like
so you can use it simply for the oval. I’m just gonna design something a little
bit more organic form, so I’m gonna go from here and then kind of going up and
maybe coming down a little bit on my right view, and coming down a little bit
like this, and then close it up with the straight line. so this is gonna be my
profile. I’m going to move this profile with the transform tool.
Orient 2 Points and snap in endpoint to endpoint here. Right here, I do want to
copy, and I do want to scale as well, and let’s snap into this place, and also
another one somewhere in the middle. because we want to have more control on
it, and the one at the end, we’re gonna do the same thing one over here, one
somewhere in the middle, and one close to the end, and we’re gonna adjust that, so
don’t worry if it is not at the right place. okay so now we have something like this.
For this one, we are going to start it front here.
Somewhere when we get into the middle, I would like to be a little bit taller, so
I’m gonna use the 1D scale and let’s scale 1D roughly like this, and we
were able to change it later on. When it come in back to the end, I do want it
to be a little bit shorter. so we want to go something like this.
Okay the same thing happened on this side, I will like this one go a little
bit taller right in the middle, and we’re gonna change that later. So don’t worry
if there’s a hundred percent fit. Okay so let’s give it a try.
We’re going to use the command Sweep 2 Rail. This is rail 1, and this is rail 2
and make sure that you record the history. We’re gonna go from here to here to here,
and then we will get something like this okay so it’s a little bit bump over
there, and then we’re gonna do the same thing over here. Rail 1, rail 2, cross
section, is one, two, and three. And then we make sure we want to record history as
well. and we hit ENTER, and then we got something like this. Okay so this is
the part we need to do adjustment is because now is completely crossed, and you
have that cross looking. So I would like to move this one
and using the move tool so I can follow the edge by moving in a little bit more.
So you don’t see that much, and you can also adjust the high if the high is not
what you want, and you can always like moving back and forth, and adjust the
high to be more suitable for your design. Okay so for demonstration purpose, I’m
going to stop here, but you do have the option to edit this curve which is a
cross-section, and also your rail. Before we cap it we need to do a test on
the pattern, so let’s having this one, and making a copy just next to it, and see
how it looks. Now, looking like this is hanging over there. This piece is hanging
over there ,and we do want it to get into the next body, so we actually need to
have it more in the body here. Once we moved in, you want to make sure that it’s
not sticking out and that will be your pattern, so now we can delete this one,
and delete this one. This is a good time now let’s go ahead to cap it, because we
no longer need it to change it ,and then if it says you break the history,
that’s okay. Alright so now let’s take a look the result, we gonna come over
maximize the top view, and we’re gonna do linear array. How many do you need?
I don’t know. I’m just gonna try more than what I need and I’m going to
snap it, make sure my “near” is on, so I can kind of slicing there. so they will
align nicely, and then you can eyeball if you want to have a gap, or you want them
to overlapping a little bit. Okay so this is the pattern that we have, and I’m
going to delete some of them here. So let’s take a look if that looks
nice to you. We are also going to… I think I might make it too high, so I’m going to
move it down a little bit by selecting everybody, and looking at
my side view, and they kind of move it down, so the rope design well show.
Now this is the pattern. Let’s take a look on the render view of that. So
if you like the pattern, and you like you know the bump and everything and we are
able to trim it, but notice that, this visually doesn’t seems right in
the center, so you might want to move it up a little bit in right here, so
visually it will look more in the center. so now what we need to do is we need to
trim the top and the bottom. Okay so after Boolean Union, they become one piece
and then we want to Boolean Difference by drawing a block on the top and mirror
that block to the other side, and now let’s go ahead to Boolean Difference.
okay so now we have this. Again we need to play with the texture right here, This
is an empty space, if you flow just back like that, you’re gonna get that empty
space, so what I like to do is I want to pick a point as my reference point, so
let’s go ahead to use the move tool, and I’m going to pick it up this point, this
end point right here, and move that end point to my edge so make sure my
intersect is on. Now we know that this is the point we’re cutting, we want
to come over here. Draw a line close to the same point that
we had there, and using that line to trim the rest of it. So it’s really rare they
will be exactly the same the first time you trim, and
we’re gonna use this one to trim the extra. Okay so all we need to do is make
sure they will be aligned perfectly. Let’s go ahead to use the 1D scale,
and we want to scale from this point all the way to the end, and moving up to the
edge they will meet perfectly, when we flow it back. So we need to come over
here to creating the surface, and we are gonna come over here
using the transform- flow along surface, we gonna pick up all of them. You can
Boolean them if you want to. Let’s pick up one of the corner, and come over here,
we want to pick it up the same corner over here, so once you have it flow back.
You’re going to see this match really nicely, if you cut it correctly. Okay one
more trick that I would like to show you this is still has the seam over there. To
close the seam, the best way to do is explode everything, and join back
everything. So that way you will get the solid polysurface here. Now,
the last step, you go ahead to Boolean Union all of them. I hope you enjoy the
video, please like and comment and share my video, so I can reach more people.
Thank you for watching and I will see you next!

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