Rhino Tutorial: Creating a Waffle Model - Part 2

okay this is part 2 of my tutorial about creating an arbitrary well a waffle model of an arbitrarily shaped solid or volume in Rhino and in this video I'm going to go over how to take the contours generated from the previous video and prepare them for laser cutting so these are the lines that are the contours generated from this object and I have grouped them in two groups that reflect the separate dimensions that they run in and so the task is we need to get these ribs as I'll call them separated and notched so that once they are laser-cut they will be able to fit together ok so just some assumptions at the outset the first one is that these ribs are half an inch tall and so the notches that we'll need to make in them I will need to be half of that so a quarter of an inch so they'll be notched the top layer will be notched on the bottom and the bottom layer will be notched on the top and the the other assumption that I'm making is that our materials that we're going to use to laser-cut are 16th of an inch thick so a museum board or matte board or something of that nature so to start what I want to do is I'm going to come up with geometry that will help me locate the notches that indicate well where they're gonna fit together so one way to do this I'm sure there are multiple ways the way that I've been doing it is if I select these ribs I can since they are planar cross-sections contours of my model I can use the planar surface command to turn these into surfaces and I'll do that for the other direction as well and the result obviously it is starting to get towards geometry that we could use for presentation purposes but that's a there are some other steps that we'll have to take there first but for now what this allows us to do is to come up with the intersections for each of these well geometry for the each of the intersections of these ribs all right so to do that I want to select each of these surfaces now I don't want to actually select the curves in this case because when you intersect curves it produces points and we don't want to do that so just to just to demonstrate if I intersect well if I select all of these and intersect on the intersect command you'll see here it generates all these points where the lines intersect so we don't want that what we want is just the surfaces so what I'll do is I will use my selection filter that's this guy here selection filter and I will turn off my ability to select surfaces sorry I'm gonna do the opposite I want to turn off my ability to select the curves okay so now when I select this I can run the inner sight command and the result will not generate points it will just generate these vertical lines here all right at this point I think I'm gonna create another copy of my geometry so that I can leave this stage here and keep working with this geometry so again I'm just gonna select curves and it should allow me to select well again I need to reverse my ability to select here I need to just select curves now instead of surfaces because what I want to work with for laser cutting is just curves so I'm gonna copy that and I'm going to paste that and then I'm gonna move it off to the side all right so now what I've moved is not just the original curves but or the contours but also the intersection lines and I still have my groups here for horizontal and well they're both horizontal but perpendicular groups so I actually am going to need this intersection geometry for both sets of ribs so I'm gonna select just those vertical intersections I'm gonna do that by selecting everything and then deselecting with the control key held down deselecting the groups I'll do that in the other direction okay so now I just have those vertical lines and I'm going to group those as well and then I'm gonna duplicate that copy paste so that now I can grab and separate each dimension or each set of curves so now what we have is two sets of ribs they each have the intersection points or lines at the right locations for the notches that we need to create so the next decision is to decide which of these groups should be the top and which should be the bottom one so I'm just gonna arbitrarily call this one the bottom and what I'm going to need to do for this is actually create the geometry for each of those notches now you can do this many ways the way that I've been thinking about doing it has to do with modeling an individual knotch and then extending it because there are cases in this geometry where halfway the halfway point is a lot more than a quarter of an inch so that the assumption that I was making about a half of an inch being the the height of these ribs only applies in those areas where the the lines are actually well equally spaced and when you've got a curved condition like this the vertical lines don't follow that curve and they can result in in different sized ribs and associated notches but my material thickness is not going to change so what I can do is I can actually model the notch that I'm gonna use at each of these intersection points and that's really simple and I'm actually going to make it larger than the notch I'm gonna have one dimension being one sixteenth which is my material thickness but then the other one I'm actually going to say instead of like a quarter of an inch I'm gonna say half a village and the reason I'm doing that is because there because of those places where it's halfway is is more than a quarter of an inch away from the edge so I create this notch geometry and I'm going to rotate it so that it's in a matching plane so now that is in the same plane or the same orientation as these ribs and I can start placing it where I need it so since this is at the bottom or these are the bottom ribs what I'm going to do is grab this rectangle and I'm going to use the copy command because that will allow me to pick a reference point from which to copy and place this object and it will also let me place multiples of those objects really quickly so when I do that I can just I'm making sure that my mid my mid object snap is on now I'm not sure that I got this right here so I'm going to start over okay copy copy and I'm going to make sure I'm getting the midpoint there okay so now I've got the midpoint and then yeah sorry midpoint and now I'm going to place that at the midpoint of these ribs and I'm just going to go down the line it looks like half an inch wasn't enough so I'm actually going to need to extend this even further maybe I should have made it like an inch and I'll do that here and then copy this one so I've got plenty of depth there and copy and again just paste at the midpoints and then for the while you get the drift for this you'll have to do that for each of those intersection points and then the same thing goes for here you'll just have to do it in a different orientation so I'm gonna copy one of these over and this time I'm just copy pasting it because first I need to reorient this for these ribs the chart 90 degrees from the other ribs so see I think that does it alright so now for these since these are the top ribs I want to place this at the bottom so I'm going to grab I'm going to copy this again copy command grab the middle at the top of the knotch and now I'm going to place that at the midpoints here so that I'm basically I'm creating the cuts that we'll use to cut out the notches at halfway points for the top ribs as well okay so that's the process there and I'm not too concerned about trimming this at this point there's there's really not much that that adds because what I can do when I lay these ribs out flat is I can actually make these cuts separately so it doesn't matter if I'm cutting out the notches first I can come back later and cut out the actual shape of the rib and those not just already be cut so we'll get to that here we'll get to laying that out in the next video and we'll see how how that layout process works thanks for watching

Channel: Daniel Eisinger

Views: 7,782

Rating: 4.7333331 out of 5

Keywords: Tutorial (Media Genre), Software (Industry), Rhinoceros 3D (Software)

Id: MQFrEiEro-0

Length: 11min 15sec (675 seconds)

Published: Sat Oct 31 2015