In order to sandwich the frame elements together, you can model a plate, washers, and hex-headed fasteners that pull it all together.
- [Instructor] Now we need some hardware that can connect these different elements here. So we need washers in here, and then on top of that we're going to have fasteners that go through, and then below that, we need something for the fasteners to attach to, and I'll call that a plate. So let's create some new layers. I'll go to the All filter, and then let's turn off the 2D Dropouts layer, don't need that right now.
And we're going to create a series of 3D layers. So I'll select one of the 3D layers that we have, say Dropouts. And then underneath that, I'll create a layer and I'll call that -Plate. And I'll give that the color red. And then I'll make another layer called -Fasteners, and I'll give that a color of cyan.
Finally, we need another layer called -Washer. And we'll give that a different color, let's say it's blue. Now, it doesn't really matter which colors you choose, just as long as you can differentiate these layers on the screen. Let's begin with the -Plate layer. I'll double-click on it to set it current, and then orbit underneath, where you can see this yellow slot. I'd like to draw a rectangle there, so r-e-c Enter.
And then I'll hold down Shift and right-click and choose Nearest from the Object Snap menu. And snap the first corner of this rectangle to be nearest to this edge. And then orbit around to the other side, where you can see the other half of the slot, and then again, use a Nearest snap, and snap that over here. Let's extrude this plate down. I need to be careful and select that. Extrude this object down four millimeters, which is the thickness of the yellow slot.
And I will erase the defining rectangle object, leaving me with just a solid object here. So there's my plate. And I need to orbit around, and look at this from above. The plate is going to have holes drilled in it that are coincident with these holes in the dropout. So I'm going to draw a circle, and I need to make sure the Object Snap is on and Center Snap is on, as well, and it is. So now I'm going to draw a circle from this top center point.
And it says it's 2.6. Let's make this slightly smaller, 2.5, Enter. And then I will Extrude this new object. And one way you can get that is by using the last modifier, just type l + Enter, to select the last object that was generated. And then press Enter again to get out of Selection mode. And I'm going to pull that well below the plate, like that. And I will erase the defining circle.
And then I'm going to copy this cylinder from the top center to the center over here, on top of this element. So now I have two cylinders. And I'll orbit underneath. And now I'm going to use the Subtract tool and select the plate first, Enter. And then select the two cylinders and press Enter. So we cut holes in the plate.
Next step would be a couple of washers that are going to rest in this slot. So I'll go over here and set the -Washer layer current. And then draw a circle, snapping to the top center. And this washer is going to be slightly larger than this hole, say it's 2.8. And then I'll draw another circle that goes all the way over perpendicular to this green element.
So now we have two concentric circles. Then I'll go ahead and extrude these circles up four millimeters, and I will erase the defining objects. And then subtract, select the larger object first, Enter, and then the smaller object inside of that, Enter. So we are left with a washer. And now I'll go ahead and copy that over.
From the center, right there, to the center adjacent. And now we need to make fasteners that connect all of this together. So I'll switch to the -Fastener layer, draw a circle, on top of this washer. And that fastener is going to be slightly smaller than that, let's say it's 2.5, and that's going to be a cylinder that is threaded, that goes down through this whole sandwich.
So I'll extrude that. I'm not going to model the threads, of course, I'm just going to model the volume of this. And I'd like to orbit around and see where that needs to go. It's going to go all the way down here, to be flush with the red plate. And I will erase the defining objects. And let's come up here. So instead of copying this cylinder over straight away, I'll just hold off on that, because I want to connect it with the head of the fastener on top.
Once that's done, I'll copy the whole fastener over. So let's go ahead and model the head of this fastener. I'll draw a circle on top of this cylinder. And it's going to be larger than the washer. Let's say it's going to be about, say, 6.4, 6.4 Enter. And then I'm going to extrude this up four millimeters, and then let's draw a hexagon void in the top here so that we can use an Allen wrench to tighten this fastener.
So I'll type polygon, with six sides. And that's going to start here in the top center. It's going to be inscribed in the circle. And let's say that that Allen wrench is going to have a certain size. And I'm having interference here, so I'm going to turn off Objects, now. Now I can more readily see the size here. Let's say it's four millimeters.
And then I'll go ahead and extrude this hexagon down three millimeters. And then subtract from the larger fastener head. I'll then subtract this hexagonal void from it. And just to add a nice bit of detail, I'll use the Filet Edge tool and select this outer edge here, and press Enter, twice, to complete the fillet. So we have a nice looking fastener.
I'll union that fastener's head together with its threaded shaft below. So now we have a single fastener that would be connecting all those different pieces together. Now I just need to copy it over. So actually, the best way to copy this would probably be to be underneath where I can see the center. I'll go ahead and copy this fastener, from its center point. And I need to turn on Object Snap, again.
Copy that over here. And let's take a look at that now from the top. So now we have the hardware necessary to connect all these pieces together and properly attach the axle in the dropout slot, and tension the belt by sliding this whole assembly forward or back, as needed.
- Establishing a layer convention and property filters
- Extracting isolines
- Trimming and extruding surfaces
- Lofting cross sections
- Sculpting watertight surfaces into solids
- Sweeping and sculpting
- Revolving boundaries to create surfaces
- Welding objects together with Fillet Edge
- Rebuilding NURBS surfaces
- Offsetting a surface