Hello everyone, Patrick in the channel leave the common asking if I can
make this type of a chain. I look at the structure I think this is really
interesting surface to show you some advance Rhino surface technique. So let's
get started!
When we look at this chain, we want to study the structure first. If
you look at a structure you can see what I did is build a surface, cut out two
holes, and blend the surface in between, and we also kind of noticed that the
surface that I created has a different depth, so there are some surface editing
tool that we will need to use for this tutorial. Let's starting from the
scratch. Instead of using oval, we're going to use the rectangle tool.
Let's right click on very last icon, this one is round rectangle conic corners.
Let's go ahead to click on the center in the option, type in "0", and we
want to set it up for 16 millimeter, ENTER, and the height, I'm going to put it
like ten millimeters there, then we're gonna move the mouse coming into the
center, and then kind of a giving a little bit oval, but a little bit corner
shape right there, so this is the outline for our link. Let's go to the front view
now, we need to creating a profile right here. Let's use the third one "start,
direction and start, end". We're gonna click on the quadrant and quadrant, holding the
SHIFT and we're creating this curve. We'll go ahead to rebuild this curve
into 7 point with degree 3, and we can kind of move it down to the proper
size and remember the center is kind of caving in, so we want to move this center
one coming in like this. Now, we have this one, we need another one from the other
direction. So we're gonna do the same thing one
more time. Snapping into the quadrant and the quadrant, holding the SHIFT to get
this curve, and then we wanna rebuild into the 7 point as well.
Let's move this down and also move the center down. I also like the those two
curve touching each others, so instead of using the "control point on", I'm going
to use the "curve edit point", so let's click on this, and hit curve at the point.
You're going to notice that now my point is exactly on the curve we're gonna pick
up this curve right in the middle, using the move tool to move this one down.
So now we have all the curves touching, I'm going to show you two
different ways to make a surface, and let's do the comparison. First of all, I'm
going to split the curve that I have as a base into two. So let's use the split
command. This will be spited by this middle line, and we have this, this, this,
and on the other direction, we have this one first. Let's use the command, it's
"curve network", so we're gonna pick up in the direction (order), and choose this one and
now you will kind of notice that, we got this surface right there. Let's
put it on the side for the comparison. Second way I'm going to make the surface
is I'm going to join those two back. We are going to split those two lines into
four different lines there. So I got one, two, three, four, now I'm going to use the
command the same one with the "Curve Network" and we're gonna select
everything at once, and notice that the same command that I use, because the
curve difference, the surface is different. Let's take a
look on this one, you're going to notice in the render view. The one that we work
with the first Curve Network. It seems has a kink or has the point on the
surface, and the reason for that is because the way to creating surface has
different direction that's moving the surface to the top. Let's take a look
on this curve one more time, our curve has a direction from the one in the
right, to the middle, to the left, and they need to follow this curve that's why all
the point it's gonna end up right there. That's because three curve is ending at
the same point. On the other way, we are telling it, it's go around this curve but
follow the curve coming here and making almost like a rail, that's why you can
see it's coming to the point and the point is right in this center. It's up to
you for which one that you would like to use, I personally don't like to have the
point on the side because when you have things on this side, later on if you want
to do the fillet edges, it always causes the problem, because everything is right
at this point. Another important concept is how we are going to do additional
editing in this surface. For example, I'm going to turn on the control points.
From the top view, I do like to have these six of them, and also the same
location on the other side for those six of them, and I do want them to go up a
little bit higher, so that way you can create some sort of a bump. Notice that
the way I creating this bump. It's because I only dealing with those six, or
nine point it's kind of giving me a dramatic change on the curve. It look
like you got mosquito bite, so that is not good for our surface. I'm gonna go
back one more step. Let's take a look on this command is called "soft move".
We want to select everything first, and these are like all the point on the
button that you don't want them to move and these are like our objects, so all we
need to have is the..... all we need to have is the control point. Now let's go ahead
to use the commands "soft move" typing soft move at the command bar
going to where that you are going to have a bump. So roughly I'm gonna say
here, and then that's giving a radius of what is the boundary of this move,
and then let's take a look on the right view. We're going to slightly raise up in
this way, and it will give you like a diagram of the bump. You hit ENTER, then
you're going to see it has this type of a bump there, and if that is the bump
that you want, let's just go ahead to move on to the next step. A line from
the center, and now we'll use the "trim" command to trim the bottom half and now
simply just mirror this to the other side.
Don't forget to join it. Alright so once we are done we can actually mirror this
guy to the other side, and join it together.
For this link so far it's about four millimeter thick, and then if you
think that's too thick you can go ahead to 1D scale it down, to make it thinner
I simply just kind of snapping into the quadrant, making a circle and
moving this circle inside of the shape. Simply mirror to the other side, this is
going to be the holes we're gonna cut it out. So let's pick up the trim command
Pick up those two curves, and trim things in the middle. Alright, so now we
have this to open in there. We're going to use the blend tool, and we're gonna
pick up the Chain Edge, make sure also chain=yes, and we want to pick up the
first one and the second one, then let's lower down the number, and you can also
lower down a number together, if you click this lock, and you can move down
those two slider at the same time. After preview to look if that is what you're
looking for, and since this is a symmetrical. I can just simply or mirror to
the other side, and join everything together. so now you have this chain and
again this may not be look exactly like the first one I build, but you get the
very simple idea and then if that is too thick for you you can simply just
1D scale to make it lower, and to see whichever that fits into your design.
I hope you enjoy the video, let me know where you're coming from it's so nice to
meet all of you online. Knowing that my video is actually helping a lot of
people all over the world, that give me the courage to continue making the videos
Have a great day. I will see you next.