- [Instructor] In the last video, we worked through the process of modeling one of the two wooden parts of our musical instrument. So, that's the larger base. Now we're gonna move onto to the top, which is a little bit simpler, but still a very important part. So, before we start here, I'm just gonna do a little bit of layer management. Under the Wooden Parts layer, I'll right click and create a new sublayer, and let's call this, Top. Now, back under the Base layer, I'd still like to keep the Curves visible 'cause we'll need those for reference in modeling our top.
But I'm gonna turn off the Solids. And that'll make things just a little bit more visually simple to look at while we're modelling. Alright, then under my Osnaps, let's look at the persistent ones. And I'm gonna deselect Quadrant and activate Center. Then, working from the Top viewport, Just need to draw out a rectangle centered right on the center of this middle hole about three and three quarter inches long and a half inch wide. So covering just about this area here.
Okay, so I'll go up to the Curve menu, go to Rectangle, and this time I'd like the Center, Corner option. Okay, so Rhino's asking me to pick the center of the rectangle, and for that I'm gonna snap to the center of that middle hole there. Now, I can either use grid snapping or just type into the command line, to set my dimensions for the rectangle. So, I'm gonna go with the command line. Again, I'd like this three and three quarters inches long, so I can type in 3-3/4 or I could type in 3.75, either way.
Okay, that's my length. And the, for the width, I'd like a half of an inch. So .5 inches. Okay, great. Pretty easy so far, right? Let's go back to Perspective view, and what I'd like to do is to extrude that rectangle profile into a solid. But I'm also gonna go ahead and grab these three through holes from our base. Those holes are gonna extend, not only through the base, but through the top, as well. Again, remember, those are going to let all of our hardware sandwich together all of the pieces of the musical instrument.
So we can use those to, kind of, bolt everything together with the machine screws and the tee nuts. Okay, so I've got all those selected. Under Solid, I'm gonna Extrude Planar Curve, Straight. And this time, I want to extrude three eights of an inch above that top construction plane. And I wanna make sure that I'm extruding Solid. I'll type in, 3/8 Okay, pretty good. And, one last step, I just like to fillet all of the edges of that top piece. So, I'm gonna work in Perspective viewport here. I'll double-click to maximize that, and I'm gonna switch from the Rendered render mode to Shaded.
We can see the edges a little bit more easily. I'm gonna use the FilletEdge command here, just to round over the edges. And I'd like to use this radius, here, 0.0625, so that's a sixteenth of an inch. So, just a very, slight roundover on those pieces. And, again, that's mostly for visuals, just makes it a little bit less clunky, a little bit more aesthetically pleasing to look at, and that's a step in terms of physically fabricating this object that's pretty easy to do. Okay, so I'd like to select, actually, all of the edges that aren't the through holes.
So, I can just go through and click each individual one, I could, maybe, do some crossing selections and a window selection, and just make sure, whoops! I don't actually want this one, so I'm gonna command click to deselect it. So just all of the outer edges of that rectangular shape. Okay, so I click Done. Check the preview, that looks pretty good to me, and click Done one more time.
Okay, so you can just see it, you know, it just makes it a little bit less clunky looking, little bit more visually pleasing, and let's see how that looks on top of our base. So, I go back to my layers panel, and show that solid Base layer there. And let's switch to Rendered shading mode. And that's looking really good to me. Okay, so obviously our top is much more straightforward than modelling the base. And the last step we need to do is just a little bit of layer management here. So, underneath the Top layer, I'm just gonna make two layers like I've done for the Base, so a Curves layer and a Solids layer.
I'll say new sublayer for Curves, And since we really only had one curve, which is that rectangular profile, that's really the only one I need to grab. The through holes I'm gonna leave in the Curves layer of the base. I don't really need to duplicate those since they're the same for both parts. If I just right click and say Move objects to this layer, and let's do a new sublayer for Solids. Then we'll grab the solid top. Then just hide my Curves so we can look one more time, just see how this is looking.
That's looking really nice and that's, actually, the last custom part that we need to make. In the next video, we'll work on assembling all the parts together, doing some renderings, and working towards a 3D print.
- Installing Rhino for Mac
- Preparing a design
- Modeling metal parts
- Importing models
- Modeling parametrically with Grasshopper
- Extruding objects
- Modeling curves, surfaces, and solids
- Creating diagrams, 2D drawings, and layouts
- Preparing for fabrication: cutting and 3D printing