Fusion 360 Sketch Constraints Make Math Easy! Fusion Friday #30

hi folks we had a job come in for a customer who wanted a part like this made but with some changes I think we got it done let's walk through how we did it welcome to another fusion Friday first things first a new component I'll call it ring and we're gonna save our file saving the file is important since that starts Auto saving it in the background this is an awesome fusion Friday on constraints it's so cool how to make use of it the task at hand is to take this part from the customer it's about a four and a half inch OD but instead of I think there's sixty or a hundred rings here they want 23 rings they don't want this outside perimeter and then they want to know where a seven millimeter rod will pass through at what diameter so this is a pretty cool math that we can do here really easily first thing we'll do C for circle I'm going to sketch on this plane right here we'll start again I don't worry about the data dimension I just create the geometry so I've got my outside and I'll do my inside so we said the ring here outside around it is 4.5 and the center is half-inch D for dimension click here place the dimension 4.5 click on this guy place the dimension point 5 now we need 23 of these grooves around the perimeter hit l4 line and I'm going to create a line from the center point of our circle all the way up here and I'm gonna I'll click here and place it and see how I hit escape once sorry to get out you see how it's sketching a new line see when I place this line it gave me that constraint there that's the horizontal vertical can strengths that you see listed right here and I know you may not know that or you may be saying John how the heck was I supposed to know that well a couple things one you'll kind of learn what these constraints look like but also see how it's black black means I cannot move the line it's fully constrained that's actually interesting it's not fully constrict on its length but if I had done let me undo that if I had done a line over here see how it stays blue that's because it knows I can still do this so what I can do when it's in that position click on the line and click horizontal vertical boom I'm going to click that line again and hit X on the keyboard turns it into a dotted line that's a construction line so now what I want to do is hit L again and sketch a line up here just anywhere is fine and now we're going to hop into Excel very quick this is really simple math there's 360 degrees in a circle we want 23 grooves so that means 360 divided by 23 means every groove is 15 point six five degrees but if we look at our photo you'll see there's a groove and then there's a solid so each fifteen point six five degrees would give you 23 instances we've really got 46 because you got 23 opens and 23 close that makes sense so I'm going to do this / - so seven point eight two six or whatever now the way I'm gonna do this is actually with two lines so I have placed another line over here so I'm going to create a dimension that's but the angle between here and here so I'm actually going to do half that amount so divided by two so what we end up with is 360 divided by twenty three times four that makes sense if not pay attention or fall along here we'll shoot I'll show you again so D I'm going to click my construction line here and I'm going to click this line here so it gives me this five point 9 degrees I'm gonna instead type 360 divided by open paren 23 times 4 closed paren so perfect that gives me the 3.9 degrees that I was looking for I'll do the same here and except instead of typing anything in I'm just gonna click that so this represents well I'd say what if it doesn't make sense I would say we watch that and see if you can understand let's go ahead and finish this out and then we'll talk about that again so I want the Rings actually I thought he didn't give a dimension here but let's just say see for circle let's say it's a 3 inch start so I've got this area here that I've selected is going to be the equivalent of the clear space here and again they did not want a perimeter running around it now they want this to be radius in here so this is so cool I love this well it's C for circle I'm gonna place a circle on this line see how it snaps to that construction line and not going to dimension it not going to snap at anything just create a circle awesome I hit escape once you see I can drag this circle in and out make it bigger and smaller and I can drag it up and down now click tangent I want this circle to be tangent to here and I want it to be tangent to here take a look folks we just created the perfect tangential fill it if you will for this feature awesome let's go ahead and hit Q for press pull and I'm going to extrude out let's see here I want to extrude out this this actually I'm going to shoot out everything for now and we'll say it's point O 5 now I want to extrude cut our shape expand the ring right here see this little arrow expand our sketches and I'll turn sketch one back on now I can see what we had I'm gonna hit q4 press pull I'm gonna pick you know what I wanted to do I wanted to see how we'd are sketches on the bottom I wanted to extrude this shape the other way so I'm gonna right click edit and I'll type negative 0.05 that leaves my sketch at the top which it just can more convenient for me I'll hit Q for press pull and I want to extrude down those two things I'll just drag it down through all the way turn my sketch off this light bulb right here so in theory I should be able to Rivera pattern this around 23 times and it should be perfect spacing I'll go to create pattern circular pattern I'm gonna choose the pattern type as a feature pattern or pattern features and then instead of click it clicking anything up here I'm actually gonna click down here this was the feature where we extruded that shape out I'll click here to select my axis it's going to be you could pick the blue line I like to pick the circle here just have it actually honestly the blue line is better because there's a chance that you delete that circle so the blue line is always the z-axis there's always going to stay and I'll do it 23 times and click see here click OK and if we take a look that should be perfectly even spaced around awesome now their question was at what point does a 7 millimeter rod and actually you know we changed I changed the number of grooves just for the sake of this example so it may not be but we'll just see may not be make sense see for circle click right here and you know I want a construction line back up the middle so I'll actually hit helfen line and sketch the line from here up to here hit escape once click the line and hit X I'll hit C for circle and I'll sketch a circle on the line and I'll type in 7mm that creates a seven millimeter circle oh yeah we'll be ok perfect so take a look I can I can I've got a seven over your circle and I can't change its size but I can drag it up and down that line and you can see this is perfect it does intersect there and they want to know at what point at what diameter does it is it perfectly touching all I got to do click tangent click on the circle and click right here that snaps it into place and I could draw a line honestly I like to do a circle just visually easier for me so I'll hit C for circle click here and I'll snap it right to there I'm gonna click on both these things and hit X to change them into construction geometry just so I know that these were just that construction geometries and I'll hit D for dimension click here and that tells me this is telling me to over constraint that's okay I just want a driven dimension it's an output and that's telling me at 4.03 eight inches the center point of a seven millimeter rod is perfectly tangential to in terms of its fit into there how cool is that that was the main point of my lesson but if you guys want to stick around I will also do the 4 what do you call them you know patterns here to line up our these are for through-hole screw so stop sketch turn that off okay hit C for circle click here now the outside circle is one point three four three seven this was just given to me by the customer and the inside was 1.031 to five so those two dimensions represent the outside and inside edge of these things and I also know there's one eighth of an inch in between each one and there's obviously four of them so let's take a look here if I hit C for circle and this is where I really don't like the Snap feature this to me is really scary so turn it off I'm going to turn off the sketch grid as well this may not be the most efficient way to do it but I like it for now I'm welcome to better ways to do it Alfre line and sketch a line straight up we're gonna go a little bit quicker folks repeating some of the same technologies the same methods we did in the beginning here I want a t4 trim I want to trim this away so I've got a line right here that little line I'll hit X for coops X for construction that lets me snap a circle Center too and like wise put it tangential so it's not interesting I wanted to I was wondering why it was blue it's not fully constrained I want the center point here hold down control and the center here I'll right-click I want them to be horizontal vertical that locks that straight up above I'm gonna create another one C for circle and let's see here you know what I can do I just sprayed it way too big that's okay all I say this one and that one should be equal and now I'm gonna drag it inside or closer to inside that way when I do tangent click here and here that way it locks it inside if I had left it out here in a tangent it would have put it as a tangent circle outside here hit select and now if you take a look I've got this circle that I can drag around just like so okay now here's the cool part elf align click here and I'll click right here that put a line tangent to the edge of that in other words actually let me do that in a different way just to show you elf align go all the way past it turn it to a construction line and I'll say I want tangency between that line and that circle so now I know this line is the total outside edge of here now to add in the 1/8 inch space so that's this little gap here between each one I'm actually gonna go ahead and hit C for circle I'm gonna sketch a circle that snaps along the center path here I'll hit X to turn it into a construction line the l4 line and I'm gonna sketch a line between here and I'm gonna snap it down here so that it's a it's a court it's you know it's touching the edge of this circle as well see that tangent right there or sorry that's at coincident so I hit D for dimension I can set this to glitch right now in fusion right now if I come out that's not the dimension I want that would be the just overall Y height of it I actually want to click right here even though I can't see anything and that's going to let me sigh pinpoint 1 to 5 except you know what I just realized that's not what I want to do either I goofed hold on I want to do a line L from here over to here I want it from the outside edge there we go like this place it and one two five perfect that gives me like my one-eighth inch space and you'll notice I can still move this whole thing around but that line stays perfectly tangent or in line so hit elf align click here go out to hear construction now click tangent between that and or you know we could have you be coincident but actually maybe that is better to do coincident in that point in here so now if I drag this construction line I'm moving the location of this whole thing D for dimension oops d for dimension between I won't be happy see I have that line selected that's why it's giving me a dimension when I start so I'll drag a little boxer to deselect everything now D for dimension click here click here and guess what that's just 90 degrees so that 90 degrees or because we've got four of them that's what that's what 90 degrees is includes the 1/8 inch gap now I can hit Q 4 press bolt click one two three drag it all the way down okay create pattern circular what's my object it's this guy right here that we just extrude it through what's my axis my blue line and I want four of them boom and if we want to check it I'll hit C for circle click right here type in 0.125 and if we just drag this 1/8 inch 1/8 inch circle around you can see even even even and even we could do that with actually tangent sees and so forth but I'm just trying to give you guys the idea so I hope you enjoyed that fusion 360 tutorial pretty cool part that if you didn't you didn't sort of know how to handle some basic CAD constraints it would be really difficult but fusion 360 and sketch constraints makes it pretty easy take care of folks if you did enjoy this I appreciate thumbs up liking it if you guys want to support our channel on patreon as little as a dollar a month we really appreciate that otherwise take care see you next Friday

Channel: NYC CNC

Views: 34,590

Keywords: fusion 360, how to, tutorial, machine shop, nyc cnc, DIY, machining, CAD, beginner, basic tutorial, drawing, sketch constraints, fusion 360 tutorial

Id: CAxaRF6PAD0

Length: 18min 1sec (1081 seconds)

Published: Thu Jun 02 2016