1 00:00:00,000 --> 00:00:12,000 Hello, in this video tutorial I'm going to use the building blocks and this FreeCAD file to design a simple bridge 2 00:00:12,000 --> 00:00:21,000 This simple bridge will consist of two towers and a platform linking them 3 00:00:21,000 --> 00:00:34,000 I'm going to use this cube block here, namely the BB2 as the building block for the towers 4 00:00:34,000 --> 00:00:39,000 and some other platform blocks for the platform 5 00:00:39,000 --> 00:00:46,000 So I start by selecting the block and then I'm going to duplicate it 6 00:00:46,000 --> 00:00:54,000 Once I got it selected I go to the main menu, here at Pieza, and use Crear Copia Simple 7 00:00:54,000 --> 00:01:02,000 Now I got a new block, I'm going to rename it, so I right click on it and use Renumbrar 8 00:01:02,000 --> 00:01:06,000 and I'm calling it First Floor 9 00:01:06,000 --> 00:01:16,000 This renaming is kind of optional, I'm doing that so I can find it more easily at a later time 10 00:01:16,000 --> 00:01:27,000 Now I'm going to move it and I'm going to move it also at this direction, which is the negative Y direction 11 00:01:27,000 --> 00:01:31,000 so I put it apart from the other blocks 12 00:01:31,000 --> 00:01:38,000 So I'm going to Placement, click on the button with the three dots and this window will open 13 00:01:38,000 --> 00:01:52,000 Now, if you're doing this in a somehow narrower screen, you might find that this window is like that 14 00:01:52,000 --> 00:01:57,000 This somehow happens when you're using the school's laptop 15 00:01:57,000 --> 00:02:02,000 Now then you cannot see properly the numbers inside these boxes 16 00:02:02,000 --> 00:02:14,000 So the first thing you should be doing is click and drag wider this window so you can actually see and read the whole numbers 17 00:02:14,000 --> 00:02:20,000 Now, as I said, I'm going to move this alongside the negative Y axis 18 00:02:20,000 --> 00:02:28,000 so I can click here and you can see it moving, but then this goes very slowly 19 00:02:28,000 --> 00:02:38,000 and I would be doing this faster if I just type the numbers into the box 20 00:02:38,000 --> 00:02:48,000 What numbers? You have to bear in mind that the separation between connectors is 50mm along any direction 21 00:02:48,000 --> 00:02:55,000 and that is precisely the same separation between blocks at every direction too 22 00:02:55,000 --> 00:03:04,000 So you should be using multiples of 50, so you move it in increments of 50mm 23 00:03:04,000 --> 00:03:10,000 as that will make much easier to place the blocks 24 00:03:10,000 --> 00:03:18,000 So we'll start with something like minus 200 and see where it goes 25 00:03:18,000 --> 00:03:26,000 and, ok, I reckon this is not far enough, I want this to be more separated 26 00:03:26,000 --> 00:03:35,000 and so I'm going to use like 250, something like that 27 00:03:35,000 --> 00:03:45,000 Now, once I've translated this block, I have to click on accept type 28 00:03:45,000 --> 00:03:55,000 because if I don't do so, then the changes will not remain and I will lose the motion 29 00:03:55,000 --> 00:04:01,000 and the block will stay at its original place 30 00:04:01,000 --> 00:04:13,000 If I were to do several motions in a row, I can just change other numbers here 31 00:04:13,000 --> 00:04:23,000 and sometimes you will like to click Aplicar Cambios Incrementales a la Posición 32 00:04:23,000 --> 00:04:37,000 and that will restart the coordinates and place them at 0, for a later time maybe 33 00:04:37,000 --> 00:04:42,000 Now I click on Aceptar and I got this block 34 00:04:42,000 --> 00:04:51,000 Now I can just duplicate this one by selecting it, going to Pieza, Crear Copia Simple 35 00:04:51,000 --> 00:05:01,000 and now I have this that I can rename to Second Floor 36 00:05:01,000 --> 00:05:05,000 and it's placed on top of the first floor 37 00:05:05,000 --> 00:05:12,000 Now if I want to move it upwards, I just click on Placement and change the vertical coordinate 38 00:05:12,000 --> 00:05:17,000 If I do it by 50, then I have it like that 39 00:05:17,000 --> 00:05:20,000 So let's have a closer look at this 40 00:05:20,000 --> 00:05:23,000 I click on Aceptar to keep the changes 41 00:05:23,000 --> 00:05:27,000 and then, what do I have here? 42 00:05:27,000 --> 00:05:35,000 What I do have here is 1, 2, 3 connectors in a row vertically 43 00:05:35,000 --> 00:05:42,000 Well, indeed, at this central point I have two connectors, one on top of each other 44 00:05:42,000 --> 00:05:50,000 When you are actually building this using the 3D printed connectors and the wooden blocks 45 00:05:50,000 --> 00:05:53,000 you will be using just three of them 46 00:05:53,000 --> 00:06:00,000 Now we place it one on top of the other so it becomes easier for us to build the tower 47 00:06:00,000 --> 00:06:11,000 and this is just to have a visually simple guide for you to build them in real life 48 00:06:12,000 --> 00:06:19,000 Now I can duplicate the second floor, same way as before, Crear Copia Simple 49 00:06:19,000 --> 00:06:24,000 and then I will have a third floor here 50 00:06:29,000 --> 00:06:36,000 Now that again sits on top of the second floor 51 00:06:36,000 --> 00:06:41,000 and I would like to move it upwards another 50 52 00:06:41,000 --> 00:06:46,000 so if it is at 50, I will type here 100 53 00:06:46,000 --> 00:06:51,000 so I move it up just 50 mm 54 00:06:54,000 --> 00:07:01,000 and now I got a three floor tower like this 55 00:07:02,000 --> 00:07:11,000 Well, I am going to make a second tower which is going to be a copy of this one 56 00:07:11,000 --> 00:07:18,000 I can use the same procedure to build it floor by floor 57 00:07:18,000 --> 00:07:28,000 but it becomes easier if I link the three floors together and just duplicate the result 58 00:07:29,000 --> 00:07:40,000 We can join two objects by using this tool here that will make a fusion of them 59 00:07:40,000 --> 00:07:43,000 First of all we have to select them 60 00:07:43,000 --> 00:07:53,000 If we are going to group objects we have to do it two by two, we cannot group three at a time 61 00:07:54,000 --> 00:07:58,000 So let's start with the first and second floor 62 00:07:58,000 --> 00:08:02,000 How do you select two objects? 63 00:08:02,000 --> 00:08:08,000 You select the first one, then hold down the shift key and click on the second one 64 00:08:08,000 --> 00:08:12,000 Now you got the first and second floor selected 65 00:08:12,000 --> 00:08:20,000 Now, as I already told you, you could be using this boolean operations here 66 00:08:20,000 --> 00:08:29,000 This is the addition, that is the abstraction, that is useful to make holes, this is the intersection 67 00:08:29,000 --> 00:08:38,000 In this case, this fashion or addition one would put them together into just one object 68 00:08:38,000 --> 00:08:42,000 But we are not going to use this, why? 69 00:08:43,000 --> 00:08:56,000 Because then the program will recalculate all the vertex and faces of the object to merge them into a new one 70 00:08:56,000 --> 00:09:02,000 And that's a lot of processor intensive task 71 00:09:02,000 --> 00:09:08,000 And then it will take a long time and that's not so useful 72 00:09:08,000 --> 00:09:19,000 So there's a simplest and fastest way to do that, which is go into pieza and compound 73 00:09:19,000 --> 00:09:23,000 So we create un cuerpo compuesto 74 00:09:23,000 --> 00:09:33,000 That way the two objects will be linked but without the need of recalculating and doing all the math 75 00:09:33,000 --> 00:09:37,000 And that's faster, like this 76 00:09:37,000 --> 00:09:42,000 Now we got this compound and we got the two floors together 77 00:09:44,000 --> 00:09:47,000 Now I'm going to add the third floor 78 00:09:47,000 --> 00:09:56,000 So I select the compound, two floors and hold down the shift key and click on third floor 79 00:09:56,000 --> 00:10:02,000 And go back to pieza and compound, crear cuerpo compuesto 80 00:10:03,000 --> 00:10:10,000 Now I got this and this compound object includes the three floors 81 00:10:10,000 --> 00:10:14,000 I'm going to rename it as tower1 82 00:10:14,000 --> 00:10:33,000 And now that I got the three floors together I can duplicate it the same as I did before with pieza crear copia simple 83 00:10:34,000 --> 00:10:43,000 Now I'm going to leave this name here because it has automatically come after tower1 84 00:10:43,000 --> 00:10:47,000 So I got tower2, which is on top of tower1 85 00:10:47,000 --> 00:10:49,000 And I'm going to move it 86 00:10:49,000 --> 00:10:51,000 Where? 87 00:10:51,000 --> 00:10:58,000 Well, I would like to move it along the x, the horizontal axis 88 00:10:58,000 --> 00:11:03,000 And the positive direction 89 00:11:03,000 --> 00:11:12,000 Please don't notice that for a compound object the coordinates are reset at zero 90 00:11:12,000 --> 00:11:23,000 So if we use multiple of 50, let's say 300 and have a look 91 00:11:24,000 --> 00:11:29,000 Well, that's... I guess that's good enough 92 00:11:29,000 --> 00:11:34,000 Ok, maybe a little... no, that's good 93 00:11:34,000 --> 00:11:36,000 So, accept that 94 00:11:36,000 --> 00:11:51,000 Ok, now I have this two towers placed apart 300 mm 95 00:11:51,000 --> 00:11:55,000 And now for the platform 96 00:11:55,000 --> 00:12:02,000 For the platform I would like to use this flat blocks here 97 00:12:02,000 --> 00:12:12,000 But then the link with the tower should include some of the 3D connectors 98 00:12:12,000 --> 00:12:17,000 So I'm going to start using this block 99 00:12:17,000 --> 00:12:23,000 Now, that will make a fixed platform bridge 100 00:12:23,000 --> 00:12:39,000 At the later video tutorial I will show you how to include some axes that will allow the platform to rotate 101 00:12:39,000 --> 00:12:44,000 And so we get a movable platform bridge 102 00:12:44,000 --> 00:12:48,000 Ok, so let's find out which platform is this 103 00:12:48,000 --> 00:12:54,000 So I click on platform here 104 00:12:54,000 --> 00:12:58,000 Platform 1, that's the flat 1 105 00:12:58,000 --> 00:13:01,000 Platform 2, that's not it 106 00:13:01,000 --> 00:13:03,000 Platform 3, that's it 107 00:13:03,000 --> 00:13:06,000 So I just duplicate it 108 00:13:06,000 --> 00:13:09,000 Create simple copy 109 00:13:09,000 --> 00:13:11,000 That's the one 110 00:13:11,000 --> 00:13:21,000 But I'm not going to rename it right now because I think I can find it easily, it's at the bottom of the list 111 00:13:21,000 --> 00:13:25,000 I'm going to move it 112 00:13:25,000 --> 00:13:26,000 Yeah 113 00:13:26,000 --> 00:13:29,000 So in which direction? 114 00:13:29,000 --> 00:13:34,000 So I have to move it along the negative Y-axis 115 00:13:34,000 --> 00:13:37,000 And then along the vertical axis 116 00:13:37,000 --> 00:13:46,000 And then I will have to move it again along the negative X-horizontal axis 117 00:13:46,000 --> 00:13:54,000 So first, along the negative Y-axis 118 00:13:54,000 --> 00:14:00,000 Let's try, I just don't remember how far apart is this from there 119 00:14:00,000 --> 00:14:03,000 But I can check it quite easily 120 00:14:03,000 --> 00:14:10,000 Let's say minus 100, sorry, not the X-axis, first the Y-axis 121 00:14:10,000 --> 00:14:15,000 Minus 100, not far enough 122 00:14:15,000 --> 00:14:20,000 Let's check minus 150, that's it 123 00:14:20,000 --> 00:14:28,000 And now vertically I don't know precisely how far it has to go because it's 50, 100 and 150 124 00:14:28,000 --> 00:14:33,000 So 150 and it's up there 125 00:14:33,000 --> 00:14:40,000 And now I have to move it so these connectors go into the place of those ones 126 00:14:40,000 --> 00:14:47,000 And that would be just 50 to the left along the negative X-axis 127 00:14:47,000 --> 00:14:50,000 So let's say minus 50 128 00:14:50,000 --> 00:14:54,000 And I got it there, and that's it 129 00:14:54,000 --> 00:15:00,000 So now, that's how it looks 130 00:15:00,000 --> 00:15:12,000 And I'm going to continue using the platform 1 131 00:15:12,000 --> 00:15:16,000 Duplicating it and placing it there 132 00:15:16,000 --> 00:15:21,000 I duplicate it 133 00:15:21,000 --> 00:15:26,000 And now I'm moving it 134 00:15:26,000 --> 00:15:32,000 How far? Well, first of all, this is minus 100 135 00:15:32,000 --> 00:15:36,000 Let's try with minus 200 136 00:15:36,000 --> 00:15:39,000 And then minus 300 137 00:15:39,000 --> 00:15:45,000 And then, well, looks like minus 350 138 00:15:45,000 --> 00:15:47,000 There it is 139 00:15:47,000 --> 00:15:52,000 And now I'm moving it to the left 140 00:15:52,000 --> 00:15:57,000 So if it is 100, let's try with minus 100 141 00:15:57,000 --> 00:15:59,000 Ok, precisely 142 00:15:59,000 --> 00:16:02,000 And now upwards 143 00:16:02,000 --> 00:16:05,000 Just 150 144 00:16:05,000 --> 00:16:13,000 The tag, and now I got it there 145 00:16:13,000 --> 00:16:18,000 Quite in the same way as with the towers 146 00:16:18,000 --> 00:16:25,000 Even though we have used two platform building blocks here 147 00:16:25,000 --> 00:16:28,000 And these connectors are duplicated 148 00:16:28,000 --> 00:16:36,000 When you are building it with real life 3D printed connectors 149 00:16:36,000 --> 00:16:41,000 You will be using just one here and another there 150 00:16:41,000 --> 00:16:44,000 Ok, now we got it here 151 00:16:44,000 --> 00:16:47,000 Four connector building blocks 152 00:16:47,000 --> 00:16:52,000 We can duplicate it 153 00:16:52,000 --> 00:16:58,000 And just move it to the right along the X-axis 154 00:16:58,000 --> 00:17:04,000 So if it is minus 100, it would be minus 50 155 00:17:04,000 --> 00:17:06,000 Like that 156 00:17:06,000 --> 00:17:08,000 Accept that 157 00:17:08,000 --> 00:17:12,000 And then again we duplicate it 158 00:17:12,000 --> 00:17:15,000 And move it another 50 159 00:17:15,000 --> 00:17:22,000 So if it is minus 50, it's going to be just here 160 00:17:22,000 --> 00:17:23,000 Good 161 00:17:23,000 --> 00:17:27,000 So now we got the platform nearly finished 162 00:17:27,000 --> 00:17:30,000 We just have to use another block 163 00:17:30,000 --> 00:17:32,000 Like this 164 00:17:32,000 --> 00:17:34,000 At this point 165 00:17:34,000 --> 00:17:39,000 So we can duplicate the first one 166 00:17:39,000 --> 00:17:42,000 We use this one 167 00:17:45,000 --> 00:17:48,000 And move it to the right 168 00:17:48,000 --> 00:17:50,000 And then see what happens 169 00:17:50,000 --> 00:17:59,000 So let's say if it is at minus 150, let's try 50 170 00:17:59,000 --> 00:18:02,000 Then 150 171 00:18:02,000 --> 00:18:04,000 And that's it 172 00:18:04,000 --> 00:18:06,000 Ok, look 173 00:18:06,000 --> 00:18:10,000 Now it's properly placed, but it is backwards 174 00:18:10,000 --> 00:18:13,000 See, these 3D connectors should be here 175 00:18:13,000 --> 00:18:16,000 And the flat connectors should be there 176 00:18:16,000 --> 00:18:20,000 So we have to flip it to the other side 177 00:18:20,000 --> 00:18:21,000 How can we do so? 178 00:18:21,000 --> 00:18:23,000 That's a rotation 179 00:18:23,000 --> 00:18:28,000 That's a rotation along the vertical axis 180 00:18:29,000 --> 00:18:35,000 Now, well, rotations are a little bit tricky 181 00:18:35,000 --> 00:18:47,000 Because the pieces will rotate either around a global central axis 182 00:18:47,000 --> 00:18:52,000 That goes through the center of coordinates 183 00:18:52,000 --> 00:18:58,000 And please take into account that we are at these coordinates 184 00:18:58,000 --> 00:19:03,000 150, minus 150, 150 185 00:19:03,000 --> 00:19:10,000 And then the vertical axis will go through the 0, 0, 0 186 00:19:10,000 --> 00:19:14,000 So let's see what happens if we try a rotation 187 00:19:14,000 --> 00:19:19,000 We are aiming for a 180 rotation 188 00:19:19,000 --> 00:19:22,000 And see what happens 189 00:19:22,000 --> 00:19:25,000 Now, where is the piece? 190 00:19:25,000 --> 00:19:31,000 Now we can click the first icon so everything fits into the window 191 00:19:31,000 --> 00:19:33,000 See where it is 192 00:19:33,000 --> 00:19:34,000 Why is it there? 193 00:19:34,000 --> 00:19:39,000 Because it has rotated from an axis that was more or less like there 194 00:19:39,000 --> 00:19:46,000 So it rotated around this axis going along this circle 195 00:19:46,000 --> 00:19:49,000 So this is not useful 196 00:19:49,000 --> 00:19:52,000 That's not good 197 00:19:52,000 --> 00:19:57,000 We can still leave it there and translate it and place it there 198 00:19:57,000 --> 00:20:00,000 But there should be an easier way 199 00:20:00,000 --> 00:20:05,000 So we are going back to the 0 angle 200 00:20:05,000 --> 00:20:07,000 So we got it here 201 00:20:07,000 --> 00:20:12,000 And let's try a different approach 202 00:20:12,000 --> 00:20:20,000 In addition to the axis of rotation with angle 203 00:20:20,000 --> 00:20:22,000 We got the Euler's angles 204 00:20:22,000 --> 00:20:26,000 Let's see what are those 205 00:20:26,000 --> 00:20:30,000 Those are not alongside the coordinate axes 206 00:20:30,000 --> 00:20:33,000 They are called the deviation, tonal and flat 207 00:20:33,000 --> 00:20:37,000 Let's see what do they do 208 00:20:37,000 --> 00:20:41,000 If I increase the angle in this video 209 00:20:41,000 --> 00:20:44,000 This is what's going to happen 210 00:20:44,000 --> 00:20:49,000 It's going to rotate quite like before 211 00:20:49,000 --> 00:20:52,000 But not around the same center 212 00:20:52,000 --> 00:20:57,000 Let's use a 180 and see where it is 213 00:20:57,000 --> 00:21:01,000 More or less quite the same 214 00:21:01,000 --> 00:21:05,000 So, that's not useful either 215 00:21:05,000 --> 00:21:08,000 We should be trying something else 216 00:21:08,000 --> 00:21:10,000 What can we do? 217 00:21:10,000 --> 00:21:14,000 We can use the center of masses 218 00:21:14,000 --> 00:21:16,000 What's the meaning of that? 219 00:21:16,000 --> 00:21:26,000 That means the origin of coordinates will be placed at the center of masses of this block 220 00:21:26,000 --> 00:21:32,000 Which is somehow inside the block 221 00:21:32,000 --> 00:21:43,000 So, let's try again with the axis on the 180 degrees 222 00:21:43,000 --> 00:21:47,000 Not good either, right? 223 00:21:47,000 --> 00:21:56,000 So, now let's try with the angle of this video 224 00:21:56,000 --> 00:21:57,000 Not good 225 00:21:57,000 --> 00:22:01,000 So what's missing here? 226 00:22:01,000 --> 00:22:05,000 Well, there's another checkbox 227 00:22:05,000 --> 00:22:08,000 We can try this one too 228 00:22:08,000 --> 00:22:10,000 Aplicar cambios incrementales 229 00:22:10,000 --> 00:22:13,000 Now, see 230 00:22:13,000 --> 00:22:20,000 We got immediately the zero coordinates 231 00:22:20,000 --> 00:22:24,000 They are reset to zero 232 00:22:24,000 --> 00:22:34,000 Now, I'm going to move it back to where it was before 233 00:22:34,000 --> 00:22:35,000 Not there 234 00:22:35,000 --> 00:22:38,000 Like, let's say, 0.015 235 00:22:38,000 --> 00:22:40,000 No, it's just 0.015 236 00:22:40,000 --> 00:22:42,000 There it is 237 00:22:42,000 --> 00:22:47,000 And now we'll try to rotate it again 238 00:22:47,000 --> 00:22:52,000 Now it's rotating the closure 239 00:22:52,000 --> 00:22:58,000 Well, it's still not fitting, but we just have to do a short translation here 240 00:22:58,000 --> 00:23:09,000 Let's see what happens if we use the vertical axis instead 241 00:23:09,000 --> 00:23:10,000 The same 242 00:23:10,000 --> 00:23:15,000 So, we can use the vertical axis 243 00:23:15,000 --> 00:23:21,000 Now, the center of mass is here 244 00:23:21,000 --> 00:23:30,000 And, as we are using incremental changes, those are relative to the previous position and not to the global position 245 00:23:30,000 --> 00:23:34,000 Now, summing up 246 00:23:34,000 --> 00:23:42,000 You have to click Usar centro de masas and you have to click Aplicar cambios incrementales a la posición 247 00:23:42,000 --> 00:23:49,000 And now you rotate 180 alongside the vertical axis and get this one 248 00:23:49,000 --> 00:23:52,000 Now, you want this to be there 249 00:23:52,000 --> 00:23:54,000 Why is it not fitting? 250 00:23:54,000 --> 00:24:01,000 Because the center of mass is not placed exactly at the center 251 00:24:01,000 --> 00:24:07,000 So, we have to move this along the horizontal direction 252 00:24:07,000 --> 00:24:08,000 How much? 253 00:24:08,000 --> 00:24:10,000 Look, this is 200 254 00:24:10,000 --> 00:24:11,000 200 255 00:24:11,000 --> 00:24:14,000 Now, I'm going to move it one by one 256 00:24:14,000 --> 00:24:19,000 2, 3, 4, 5, 6, 7, 8, 9 257 00:24:19,000 --> 00:24:29,000 And I will zoom and make sure these circles are properly separated 258 00:24:29,000 --> 00:24:34,000 Like there and there and there 259 00:24:34,000 --> 00:24:36,000 So, look, it's 16 mm 260 00:24:36,000 --> 00:24:39,000 That's what you have to move 261 00:24:39,000 --> 00:24:43,000 Let's check moving it a little longer 262 00:24:43,000 --> 00:24:46,000 See? It's gone past 263 00:24:46,000 --> 00:24:50,000 So, we go back to 16 and they fit 264 00:24:50,000 --> 00:24:53,000 Now, accept that 265 00:24:53,000 --> 00:25:04,000 Well, and that's how you get a very simple bridge with two towers and a fixed platform on top of it 266 00:25:04,000 --> 00:25:06,000 Ok, thank you