 Hey guys, Vladimir here with Desktop Makes. So one of my subscribers, we'll just call him Darryl because that's his name, reached out and asked if I could help with the design of a replacement ground spike for a solar light. You can see the broken piece here. Well, I gladly accepted the challenge so in today's video I'll show you my design approach. Now if you'd like to take on this challenge, go ahead and pause the video and give it a shot and then come back in and we'll compare approaches. I'm gonna go simply by the picture here and we'll just be guessing at dimensions since I have nothing to go by, but I have seen one of these before. Alright, let's dive in. Alright, we'll begin by creating a sketch on the front plane here. So our blue, red or zx plane. I'm gonna start with a line right from the origin straight up. And I'm gonna give that line a dimension of 140 millimeters here. And now I'm going to sort of just begin sketching the rough outline of that profile. Not worrying about getting the exact dimensions, but I know it comes out a bit and then it goes up a bit and then in and then out and then back in. So, you know, this is a rough profile and I can maybe clean this up a bit before I enter dimensions. But I'll go ahead and start entering dimensions now. The bottom edge here, I'm gonna go with 12 millimeter radius. And then this first segment here, I'm gonna go with 60 millimeters. And then this point here where it starts to jut in, I'm gonna go with 100 millimeters from the base. And this other sharp point on the outside there, we'll go with 120. And let's see, the distance here where this inside point is, I'm gonna go with 7 millimeters. And this right here, the outer point there, I'm gonna also dimension that one at 12. Okay, so just some rough dimensions. Now, I'm not basing these off anything. I'm just basing this on what kind of looks reasonably accurate from just the picture I have. So, I'm gonna go with that. I'm gonna take this center line here and I'm gonna make that a center line. So, this line, make it a center line right from our sketch palette. By the way, if you want to know what all these funny little symbols are up here, make sure to check out my Fusion 360 sketch constraints cheat sheet. It's a free downloadable PDF that describes each of these symbols and what they do and how to use them. And then I'm gonna click finish sketch, go to create, down to revolve, select my pro... Actually, I don't even have to select anything. That's so beautiful with that center line tool. It's pretty smart. Once you have your center line, it'll pick where the profile is and it'll automatically do a full revolve. So, you'll have this shape here, which kind of looks like an intercontinental ballistic missile here, but we won't be using it for that purpose. And next, we're going to use our thin extrude tool. So, I'll show you the approach we're gonna take. We're gonna create a sketch on the x-y plane. And let's go ahead and project just this circle into that sketch of the base of our missile here. So, we'll go P for project, select the outer perimeter there. And in this case, I'm using a specified entities that I have selected. Click OK and then we'll untangle the bodies there. So, we see just that sketch. And I only need to see the second sketch here. I don't need to see that first sketch. So, we'll untangle that as well. The approach I'm going to take here is I want to extrude these sort of side fins here. And we're going to do that with thin extrude. So, we're not going to make full profiles, we're just going to create some lines. And this is a super efficient method to do this rather than relying on creating sketch profiles. So, I'm just going to create a line out here. I'll grab my midpoint constraints here, click the line and click on the center icon or the center origin there. It's going to throw the line right on there and put it right on the center. And I'm going to click my coincident constraint, click on the end point and in the circle and it'll bring it right to the edges. So, you see here how using these constraints makes that just so much more efficient in trying to draw it in place. And I do have a free constraints cheat sheet, which I'll leave the link below for you to grab, which lists each and every one of these constraints here in a small description in the image of what they do. So, you can kind of have it as a quick reference. Again, you can get that by clicking on the link below. All right, to do the vertical line, I'm going to use the same approach. I'm just going to draw a line, make it sort of extra long. Midpoint constraint, click on that line, click on the origin, grab my coincident constraint and coincident this end point to the perimeter of my circle. Okay, next we'll go ahead and create. So, that will take care of this, the center fins there. And then we're going to go with this guy and this guy here. So, to do that, what we'll do is I'm going to go back to the design. Again, I'm just going to draw two lines across here. You see, I've got a perpendicular constraint there. And I'll go ahead and draw one more. All right, now a couple things I'm going to do here to get these lined up. Now, I want them to go past. They don't need to go right up to the edge here. So, I'm not going to worry about putting a coincident constraint between the end point and the circle. But what I can do is I will, for example, use a vertical constraint here. And if I hold the shift button and I hover over the line near the middle, it'll give me that midpoint there. Click on that, click on the origin, and that'll center that line right on the origin. I'll do the same thing with this second line here. Find that midpoint. Go ahead and make it so that they're both centered on that vertical line. I can go ahead and make them both equal. So, I'll grab my equal constraint. Say this line is equal to this line. Next, I also want these to be symmetric. I could have drawn one and mirrored it, but you can also, after the fact, use your symmetry constraint. So, the way this symmetry constraint works is you click on it and you say, I want the first selection and the second selection to be symmetric about the third selection. And you can see here now I can move them and they're both symmetric to this line here. So, now I can enter a dimension here and I'll make that six millimeters for this line. And lastly, I'll add a dimension to this segment here. Let's say 30 millimeters and I'll click on finish sketch. Let's bring the sketch back into view here and we'll hit E for extrude. And I'm going to select thin extrude here because we're just going to extrude the line. I'll select the vertical line in this horizontal line. So, we got this cross there. Bring my bodies back into view. And in here, I'm going to do, let's go see from the bottom up here. So, while thickness, we'll go with center. I'm sorry, while location, we're going with center. While thickness, we'll go with two. Distance, we're going to go all. Actually, let's start dragging that up first and then distance all. Let's see if we have this. It wants to cut. But we don't want to cut. What we want to do is apply an intersect. So, we're going to change the operation from cut to intersect here and click OK. And you can see that that leaves us, which is the intersection of where both bodies would meet. Which gives us that cylindrical shape of that first body we created plus our thin extrude lines. So, now we have this which kind of, you know, pretty much gets us there. Let's continue with the other lines here. Let me bring them back into view. And here, I'll hit E for extrude. Again, select thin extrude. Select both lines here. And I'm going to start dragging this up. I'm going to make this, actually, let's go ahead and do the same thing we did on the other one. Center, while thickness is going to be two. And for distance, we're going to go to object. And I want this to go to about right here where this starts to curve in. And I can reference that point. And we're going to change the operation from cut to new body. Click OK. Alright, now we've got these fins there. And I'm going to apply a chamfer here to these edges. So we'll do modify down to chamfer. I'll select one, two, three, and four of those edges. And I'll just start bringing them in until they sort of meet the middle here. And we'll go ahead and say 14, 15. Oops, we'll do 15 millimeter chamfer. A little more. I want that to fully be inside there. So 16 looks like it'll get us there. Alright, 16. And there we have it. Okay, so now we have the two, actually three separate bodies here. And we have our middle body we created. And each of these outer fins are their own bodies. Okay, next let me untangle bodies. Come here to the circle. E4 extrude. And I want to just select the circle there. Alright, and now I'm going to bring the bodies back into view. And I'm going to go straight up. This time I'm doing a regular extrude here, not a thin extrude. And I'm going to do distance, change it to all. And the operation is going to be intersect again. So we'll change that from cut to intersect. And again, that's just going to leave me the intersection of all the bodies there plus where the circle covers. And click okay. And you can see there that it gets rid of sort of anywhere that those fins go outside that circle and leaves it so that you see this part here is actually follows the circle right there. So okay, almost done here. A couple more things we're going to do. I want to go ahead and make this bottom portion here. And this part right here, those two kind of cylindrical extrusions there to make this quite a bit stronger. To do that, we'll go ahead and select this circle here. So let me make that selection E4 extrude. Bring the bodies back into view. I'm going to go up, change it to a join. We're going to do three millimeters here and click okay. And just the fact that I made that a join, you notice that it went ahead and combined all the bodies into one here. So because this extrusion touched every single one of the other bodies, it automatically joins them. And I'm going to do that again. So let's go ahead and bring that sketch into view E4 extrude. And we're going to select this profile again, our circle. This time I'm going to use a different approach here. So instead of starting at the bottom, I want to start about up here, let's say 20 millimeters or so up. So what we'll do here is we'll change start to be from profile plane to offset. And then our offset will do 20 millimeters. And oops, make that 20. And now notice, see how the arrow jumped up. Now if I start extruding this up, see how it extrudes from a different location, basically 20 millimeters up. And I'll just change operation from cut to join. Make that an even three. And there we have it. Click okay. And let's see here. So now we've got this shape. And if I want, so I'm looking at this right now and I'm thinking, okay, maybe let's say 25. Let's push this ring a little up more up. We can simply go back to that extrusion, change that offset distance from 20 to let's say 25. And you can see how that's jumped up. So that looks pretty good to me. Final thing as I'm looking at this that I'll probably do here is maybe a fillet on these edges just to make it a little bit stronger. So F4 fillet. I'll go ahead and select each one of these edges. One, two, and then one more. So that's four. Try maybe a two millimeter fillet. Yeah, that looks pretty good. Click okay. All right, one final thing left to do is there was a hole here on the original model. So let's do that by creating a sketch on the surface. I'll hit P4 project. And I'm just going to select this area here to bring that in. So I get that outline. I'll uncheck bodies so I can just see that one section. I also don't need to see the first two sketches. All right, here I'll hit C4 circle. I'll create a circle. And then I'm simply going to use my constraints here. I'll actually grab my tangent constraint and make this circle tangent to this edge and also tangent to the bottom edge and also tangent to the left edge there. Perfect. Exactly where I want it. Finish that sketch, bring the sketch back into view. And then I'm going to hit E4 extrude. Select this, this, and this profile here. Let's bring the bodies back in. And I'll simply now take that arrow, bring it down distance, all click operation is set to cut and then click OK. And there we have our hole there. So all right, there we have it. There is our tent stake. All right, if you took a different approach than I took here, let me know in the comments. I'd be curious to check it out. And if you have any questions on my design approach, leave that in the comments as well. Huge shout out to all my Patreon supporters who keep these videos coming. Thank you guys very much. I'm going to upload the Fusion 360 file for all my Patreons to be able to download and play with the designs if you want. And if you're currently not a patron and you enjoy my content and find it valuable, consider becoming one. I'll leave the link below. And finally, if you're looking for a structured approach to learning Fusion 360, I've got some online courses that you can also access below. All right guys, I'll see you in the next one.