Print Heir Attachment with airSlate SignNow

Print heir attachment

so the the plan tonight is to scan the front of this motorcycle helmet capture the locations of these snaps and this vent and to make an accessory for the front of the helmet and I don't really want to say exactly what it is it's something I'm doing for a customer but this is something where the 3d scanners ideal because we can get the exact location of these maybe accurately placed objects we can also grab the surface curvature of the whole helmet offset it and build the accessory off of that so the first problem are going to face is that this plastic which is like a polycarbonate or a lexan is glossy and it's black so with a structured light scanner we're gonna have the problem that it's going to absorb the light and it's also not going to reflect it evenly there are specular highlights and other problems so we're gonna treat the surface of this with a spray that's going to make a diffuse coating it's close events so this is a metal check d70 this is the California made spray it's calcium bicarbonate and fo alcohol spray this we're just gonna dust the area of interest and you can see it already like fogging over and this is almost already enough for the scanner to pick up the surface but I've it's not quite as even as I might like so we're gonna do a little more kind of around here alright that's probably more than enough and the risk with this stuff is always that you put too much on and you get like a drip or it goes too bright that actually looks pretty great alright so we'll go from here back to scanner first of all we're gonna start a new scan we've got to get the scanner in the helmet so they're looking at each other so we'll probably do this on the turntable here I think yeah sweet the whole helmet lines up really nicely on the turntable my guess is that this position of the scanner is not really right so we're gonna spend a few minutes setting that up and we'll do a new project and we're gonna call this helmet scan and we're gonna go we're not so we have the option here to capture a texture or non texture we don't want any color when they say texture they mean the surface colors so we only care about geometry so there's that yeah so the scanner is completely pointed like down and away from where we want to go so we're just gonna adjust it first of all by tilting it up there's actually a cross here which is from the scanner and you want that cross to be in focus and you want it to be relatively centered on the object and I feel like that's actually a pretty great spot for it we might even get the entire geometry that we want in it like a single scan so let's see I'm gonna run with this I'm gonna check what this let's grab this guy's we'll use this to capture the screen so when we scan the scanner scans with lights we always got a dark in the room so what happens is the scanner projects a set of what are called sinusoidal gratings sinusoidal gratings are just a pattern that fluctuates bright and dark and the it looks at it with two cameras and because the cameras can see in stereo they can see that pattern distorting across the surface it'll take four scans and then I'll line the different scans so it just snap them all together and now it's gonna just keep moving around now we're probably gonna lose the scan as we go around because we didn't treat the whole surface but we kind of don't care so there's a region right here where the scan spray was kind of thin and that's showing up in the geometry right there I'm gonna up the exposure to hopefully capture that darker region so we're just gonna run the exact same scan again and hopefully pick up some of those spots that worst case we put a little more scan spray on it but this is amazing check that right I love this is my favorite one at all like and let your lines we end up out it out of the right now what we have is it like it's as though you took a caliper and you measured four million seventy-one thousand points bottom left corner okay and so this what this does is saves you from that now what goes from here so we have these millions of points right what you need to do is connect them in connect each point until you get triangles for every three points and that's called meshing so you can mesh to what's called a watertight model or you can mesh to what's called a on water tight model watertight model it'll try to seal it like a balloon or something and we don't want to do that because what's it gonna do in all these weird spots right it's just gonna make summed up so we're gonna accept that one of the things I've learned about 3d scanning it's really important is the it's like cleaning up your data so there's this weird stuff hanging here where it started to pick up the interior cloth and whatever and you want to like you just want to delete that I mean we're at six million eight hundred seventy two thousand polygons so it's like takes a moment to save out and it's say it's nice it actually saves all the data as just like text files yeah we're gonna take these data into a program called space claim which was the reverse engineering software and we're gonna essentially create a surface and we're gonna ask the software to wrap it onto this surface really yep and then from there because that this is like a mesh with like random triangles everywhere when we get space claim going space we're gonna create like a mathematically perfect grid and we can take that grid and like extruded or offset it or build it up or make it into some other shape it will pretty much Bob's your uncle at that point I say that it's always fraught with problems so we're gonna mesh it click the mesh button on water type model and you'll see two for a second and it'll basically fit bits and polygons to it so here we are in mesh mode so now it's tough to get behind this menu but you can see it's basically taking the whole surface and stitched all of those things together now it has a hole filling mechanism right I'm actually gonna turn that on say fill any holes that are like up to five millimeters and now the other thing I can do is simplify and that's usually a really good idea so this mesh after meshing is like a million polygons and we could deal with like half of that so we do this and I just hit apply and it's gonna chew for a minute and hopefully most of these will fill in right and that just makes it easier to deal with and then also it'll the whole mesh will just have fewer triangles and then we will put it on a flash drive and go over space plane okay so generally speaking the first task that you have when you do 3d scanning is to orient your mesh data meaningfully to the world now one thing we can do just to kind of get things close is we can't move using the move tool so we'll grab this right here and we'll do a point-to-point and we'll just bring it into the to the origin I like that just because it makes tumbling around a little easier okay so now let's one of the things we can do is try to orient the mesh using the orient mesh tool and the orient mesh tool tries to fit a prismatic shape to whatever geometry you have let's just try this cylinder this is going to set the z-axis now if we look at this from the perspective of the front it's actually a pretty good fit my only beef is that the we're off center so the first thing I'm going to try to do is find something that will let me set the Y meaningfully that will get us centered and that's not the end of the world right there but I think this is good enough to do the development that we want to do so what we'd like to do is we'd like to extract this surface and there are a lot of ways to do it but one of the simplest is to just draw the curve that you desire so if you call the sketch tool you can literally in space claim just sketch along the 3d surface and let's make another spline so we're gonna hide the helmet for a second to come and start here and then bring the helmet back and we're gonna double click here let's back up I screwed that up okay we got another spline and let's make a third spline by touching off on this face on that vertex excuse me and then by running back around the helmet like so and let's bring that helmet back so because space claim is really pretty good at dealing with meshes we've basically just sketched across the surface of the mesh and captured that face ok so what we have right now after doing this is we have a set of curves that follow our surface they actually looked pretty great so now we want to do is bridge or blend between these surfaces so we choose the blend tool and we get this pretty nice looking geometry so let's put that back over the helmet and you can see that it's a little bit underneath the top surface of the helmet but the deviation isn't huge so the next phase of do making this part is we're going to grab that surface the one that we just defined and we're actually going to pull it so we're just going to pull this out and commit to that and now we've got a ten millimeter thick extrusion that follows along the helmet so that's probably the fastest thing I can think of to test out this idea and now we're going to clean this up so this edge is not particularly clean and this top edge is also not particularly clean so what I think I want to do is actually fit a just just create a plane based on this and this rotate it into position something like that come on and I'm gonna just visually since this is an aesthetic part and not real engineering critical I'm just gonna line this up with the top of the object that we've created and it's okay to cut in a little further because space claim is so flexible so let's line this up and I see that there's a little bit of rotation from this edge to this edge so we might try to get lined up a little better with our model let's try one degree of tilt and then Center this back up just so we're just touching that top edge that looks good and now we're going to use the split body command so we're going to choose split we select the body and we select the plane select that select that and now we can delete that wavering top portion so now we have basically a mathematically perfect cleaner top section which is a big plus back out of that tool choose the move tool again touch this plane and let's rotate down and try to get in touch with that bottom surface let's give it again there's some slight rotation here but let's just move this up until it's clipping on both sides okay so now we're going to choose the split body tool again we're going to take this body in this plane the purpose of doing this is to get rid of that unevenness at the bottom line split body tools smart and nose you want to get rid of stuff so we click to get rid of stuff and actually I'm really pretty happy with that so now I want to extend that surface back out in such a way that is sort of useful to me so I'm going to choose the pull command I'm gonna grab this face and stretch it out so it goes beyond those snaps this is a visual assessment I see I'm just about to interfere with that edge right there so let's back it off a little bit that looks good to me and now finally I want to capture the location of those snaps because if you look at the solid that I've created it's over top of these three snaps so how do we capture the snaps it's actually pretty simple we want to use the Select tool we want to use the brush and we are going to select using paint we're gonna select the region around each one of these snaps and the idea is that if you select a region of polygons which is sort of on average coplanar with the feature of interest you can create a plane that carves through your feature of interest so this is great because now I can sketch on that surface there's the centroid of that plane but I think I'm actually supposed to be slightly above it and I know that these snaps are ten point two millimeters now I'm going to extrude that by pulling it this is space claim after all so every tool is dramatically overloaded and I know that I need to go four point five millimeters up now I can see that I'm slightly off so I'm just going to take the the object that I just created dang it and I'm gonna move it into Center and that's great I'm done on that so now I'm gonna do the same thing again I'm going to select with paint and I'm gonna choose this region around this snap here I'm just trying to get enough polygons that I feel comfortable that the average will land on that snap but without capturing the snap so let's create that plane oh it's beautiful you can see the region here and let's create a circle against you know roughly centered on that plane and ten point two millimeters in diameter which I measured from the snap and then I'm going to pull that four point five millimeters so now here this actually looks pretty darn well on line although I might still scoot it just the hair in another direction again this is a prototype we're trying to figure out if this is a good idea so we're not you know half a millimeter here there isn't going to matter that much all right I love that that's great so finally we do it one more time we're going to go paint a selection on the faceted body like this and we're avoiding the geometry of the snap because it's misleading and it's incompletely captured and now we're going to construct the plane which you can see fits very well to that snap and again we're going to do a 10.2 diameter circle and we're going to pull that circle four point five millimeters vertically and actually that one is so close I'm tempted to not move it but I'll up it's hard not to be a perfectionist here so we're going to move it that that half a millimeter to really get it right okay so now we have a helmet we have the snap locations outlined they look beautiful and then we have if I can get it to come back we have our original solid so in just you know ten minutes or so we've extracted the surface of interest we've created three snap surrogates and we've got going now one thing is I really don't like is you can see that this surface is protruding pretty far below the surface of the helmet now if I had added more control points at the beginning this wouldn't be coming in so far but I can mitigate that just by grabbing the surface right now and pulling it upward and right about there is it actually about where I want to be I want there to be a small gap between the surfaces and you can see that it's only touching at the edges which is okay because I kind of want it to hug there anyway so that's great and that's one of the advantages of space claim right there now finally we're gonna hide the helmet and we are going to use these objects as tools let's combine select the target selected cutter and select the region to remove which would be this inside region now we select the cutter we remove this inside region at the end of the day this is our prototype helmet attachment so this may seem silly but it's the beginning stages of product development here it is we're going to export this as an STL and load it into idea maker so idea maker is the software for my 3d printer here's the final STL we're gonna slice that and print it so this is kind of an exciting moment after doing this scanning and reverse engineering of this surface and these snap locations I've got a first 3d print in ABS of the attachment so it's just got three holes in it and the idea is to snap this onto that if all goes well yeah that's pretty great that is pretty great sorry it's cold in the shop here you can see my winter coat but I mean for a first effort and an easy extraction of geometry and space claim that's pretty excellent you can see I got a little tiny cracking over here and that's just because the ABS layers are this way and I made the holes deliberately tight so that they'd snap on but essentially that's what we were looking for and it was really made possible by the Aisne scan scanner and the space claim reverse engineering suite pretty cool [Music] [Applause] [Music] [Applause] [Music]