In this video learn how to rotate and reposition the cross-sectional drawings of the drivetrain with respect to the model. Then displace these drawings a set distance to the side where we build the axle.
- [Instructor] Let's begin working on the drive train. Go up to Layers and turn all the layers on. So we're going to be modeling these elements down here. And I've provided sketches both in plan as you see here and also in section over here. So we have an axle running through the entire assembly and that's capped off with acorn nuts, as they're called, on either side. This white element here is the controller, which doesn't rotate.
It interfaces with the hub transmission, which is shown here in red. And then this is the sprocket, which connects with the belt. Over here we have a rotor for the disk brake and the hub, which it's attached to. And there are also some washers in here that connect the hub to this formula meter gap. You'll see formula meter gaps on either side. And these correspond to the dropouts that we've already modeled. But as it stands, all of these elements are separate pieces.
Let's group them together. Type group, Enter, and then select all of this and press Enter. So now we can manage it all as a single object. I'd like to orbit and then let's rotate this around this central center line axis. The rotate command works by rotating around the blue axis, so the UCS is in the correct orientation right now to allow us to rotate around the center line.
So I'll type R-O for rotate, click on this object, and rotate it from this end point. And I have Ortho on. We can rotate it freely without Ortho, but if I turn Ortho on I can rotate it up and just click above and it rotates 90 degrees. Now let's move this into the proper location. I'll type M for move, Enter, select the group, Enter, and I'd like to grab it from this intersection point here.
And I'd like to force an intersection point rather than using a midpoint snap, so I'll type I-N-T, Enter. Then I click right here at the intersection of these two center lines. And then I'll just navigate over here. And I want to snap that to this node right here in the center of the axle shown in plan. So now this sketch should be in the right location and I can orbit around. If we look closely we can see that it does appear to be correct.
However, there's just way too much complexity to make much sense of it. So I recommend moving the sketch back into an area where we have some clear space. But I don't want to move it an arbitrary distance, I want to move it a set distance, so that I can maintain that distance and I can model things over on the side and then move them back into position. So let's move that over so it's clear of the bicycle. And you can see in the tool tip there that we're moving it about 500 millimeters.
So let's make that exact, I'll just type in 500, Enter. So now it's back half a meter from its ultimate destination. I'll zoom in here and I'll go ahead and ungroup this. I'll type ungroup and just click on the group and it's immediately removed. So now we have access to the individual pieces. Let's start by modeling the axle. Let's create a layer for that, it's going to be 3D Layer, so I'll go to All, so we can see all the layers.
And then I'll go ahead and create a new layer and call it -Axle. And I'll leave that as a white layer and I'll set that current. And then I'm going to zoom in down here and I want to reset the user coordinate system back to world, so the X, Y plane is on the ground. Type U-C-S, Enter, Enter. And then draw a circle, C-I, Enter, from this point here to the end point there.
And then let's extrude that. I can type ext for extrude, but then I need to take a look at which mode we're in. Right now it's in Solid mode, you can see that here. You can change that by using the mode option and you can choose either Solid or Surface. I'll stick with the Solid. It makes it a little easier, because the object will have caps automatically on top and bottom if it's a Solid, whereas we'd have to generate those manually if it was a Surface.
So I'll go ahead and select that circle, press Enter, and then navigate up here and snap it to the top of this sketch right there. We want to erase the defining object, Yes. That erases the circle. Then I'll go ahead and move this axle over 500 units. Now it should be in the exact correct location. So in this way we can model things off to the side and when we're doing we can just offset it over using that value of 500 millimeters and everything should line up.
- 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