Design a Rasberry Pi case for 3d printing tutorial using FreeCAD LinkStage3.

hi to all how's it going i would like to start this video by thanking the brave people that thought that supporting me on patreon was a good idea and on a personal note to acknowledge that they helped me on a really important personal side of my life to make a long story short a small part of those money were used to apply for the italian citizenship i think that a thing that i was eager to do for years given that i live here for a long long time this and busy work schedule have delayed making videos a bit but hopefully we're back on track thank you so much it means so much to me and as a side note i wanted to let you know that those money are also partly going back to the developers and partly getting used to push ahead of the cnc project project so we can experiment and improve even more anyway let's get on with it so as this is not quite a beginner tutorial i will make a lot of views of the pie menus and other shortcuts to speed things up i will link the tutorial on how to set them up somewhere here on the video also important in this tutorial i'm using the refined property of bodies set by default to true you can set this in the edit menu preferences part design general tab our goal for this video is to give it a shot at in context modeling for this purpose we will modify enclosure for raspberry pi for 3d printing that hopefully will follow the cutouts positioning referenced from the board it will also sport a complex shape for the separation plane of the two halves and that is a full-blown tutorial in itself because of this the tutorial will be split in at least two parts to keep things from being over an hour long the board model was downloaded from grab cad in the step format and you can get it at the address that you see on the screen [Music] we will start by first importing our board model so go to file import and select the raspberry pi step model let's create a new part that will be active and rename it as raspberry pi case go ahead and grab the imported model and let's move it inside our newly created part as you can see the board is rotated in a weird position so right click on the voice in the tree view choose transform and we will rotate the board for 90 degrees press escape to dismiss the tool and i think i will make the combo view always visible to have a good idea of where things are positioned in 3d space it is always helpful to have the the axis cross visible you can enable it in view toggle axis cross or you can use the ac keyboard shortcut move to the front view select the raspberry pi part and let's change the position in the z direction by 6 millimeters make sure that the raspberry pi case is the active container and create a new body rename this body as master case while making sure that the master case body is the active container expand the tree of the raspberry pi step part select the main board body and create a subshape binder bear in mind that in link stage 3a you can always use the eye icon to hide or unhide objects for a better view or to check for collisions this shape binder will be the proxy geometry that we will use to position the various features that we need on our raspberry case and we will use the same techniques to make the cutouts for the various ports that are present on the raspberry pi click on an empty space to select nothing and we will create a new sketch on the x y plane let's create a rectangle right click to dismiss the tool select two vertices and the origin of our sketch press s for symmetric we will give this edge a vertical dimension of 64 millimeters so shift v for vertical 64 millimeters and this edge will be a horizontal dimensions of shift h of 90.5 now that we have a fully constrained sketch we close the sketch and we will pad it for 25 millimeters press ok okay so let's compact a bit our tribute select the master case body press ctrl d for the material properties we will choose plastic as material we will give it a orangey color and a 50 transparency this way we can see how things work inside our model so close this view we can always hide and unhide the board model for to check for collisions so if we switch our view to shadow view notice how the case doesn't cast any shadows to remedy to that we need to select the file name voice in the trivial go all the way down and change the transparent shadow from false to true this will give you transparent shadows with a small price in display performance so at this point we need to select our top face and we will make a fixed solid we need to have a thickness of two millimeters i want to make the thickness inwards and the joint type i want to be in an intersection press ok and we have our hollow box i did this because there is currently no way to use the thickness inside the closed body in a freak head and this is a workaround at a later point in the video we will create the top face for um for our case you will see that during this tutorial i will make heavy use of the eye icon to hide and unhide the objects in that 3d view so let's go ahead and hide our board model i want to hide alway also the last feature that i made so that i have visible only the shape binder that binds uh to the mainboard model okay so at this point we need to reference the holes present in the main board component of our raspberry board so we need to carefully select the bottom arcs of the holes on the existing shape binder so select this edge and this edge and we slowly go through all of them it is important to be careful that we have the right and right edges selected okay let's control this one also and we need to create a new shape binder that it is based on our selection it is important to check that the shame by shape binders property fuse is set to true and also the mac makeface property is set to true let's hide the our original binder unhide the last feature of our model move to perspective view and making sure that the binder is selected we will pad it we will pad it reversed and we will choose up to face we need to select the face that we want to end up to and will be the bottom one we also need to make to give it a one millimeter feet tolerance and this will make so that [Music] the extrusion is one millimeter wider than the original hose holes click ok and let's move to perspective view notice how by using shape binders as a reference geometry the features on our model will closely follow the position of our main board so if we try to transform our board and refresh the view take a look at how the model updates itself okay so it is now time to make the various cutouts for the ports on the raspberry so go ahead and hide our last bed select some convenient faces on that are located on the raspberry model [Music] let's see something here and we have another port here with this reference faces selected we will create another shape binder and this um shape binder for a easier navigation of the tree view we can rename it as ports reference so switch to the perspective and hide the raspberry model so we are left with only the shape shape binder visible and hide also the main board binder and we will rename this also and let's make visible the last pad again to create the cutouts on the side of our case we need to create a new sketch that will be placed on the yz plane hide the pad and unhide the main border reference so let's import some external geometry i need these edges here [Music] and we can always hide and unhide the board model to have a rough idea of what we are doing right click to dismiss our tool click the rectangle tool let's create the cutout for the ethernet port another one for the two usb hubs so let's start constraining this sketch hide the raspberry model switch to construction geometry i need a vertical line so select this vertex this vertex and this one and press symmetric so it seems that we have this point on the object constraint that we don't really want so i need to go ahead and find it right click and delete this constraint now we can move again our sketch i want this point to be to be fixed on this line so shift o on your keyboard and i want the external vertices to be symmetric to the center one so press s on your keyboard so let's say that i want a vertical dimension of 0.5 millimeters so shift v 0.5 here i want the same here also and uh horizontal this uh distance between between these two points of uh 0.5 millimeter so shift h for horizontal 0.5 and we have a partially constrained sketch we can check for collisions with our ethernet port and it seems pretty okay with me perhaps 0.7 this distance here would be better 0.7 okay and in here also okay so let's go ahead i want these two lines to be equal so press e on your keyboard after selecting them this one and this one equals okay so if i unhide my raspberry model i can see that i can pretty much fix this point to our previously imported line that references the board unhide the board model select this vertex and the line press shift o on your keyboard i want to go ahead and give these two vertices horizontal dimension of 0.7 millimeters so shift h 0.7 and in here a vertical dimension of 0.7 millimeters i now actually need a way of creating a symmetry between [Music] the external contour uh of our cutout and the actual port on the board so i will import another piece of geometry from the shape binder i need this and this one also we will create a bit of construction geometry and let's make it tangent to the this geometry select this vertex this vertex here and this one here press s for symmetric on your keyboard and we will do the same with the vertexes on top as for symmetric and we had we have this geometry also constrained we need to do the same thing on the less cutout so let's we have a fully constrained sketch let's close it and hide the last pad and we will make a pocket reverse the direction of the pocket and choose type through all press ok and we have our cutouts if we unhide the raspberry pi model we see that we are pretty much setted up so if we take a closer look at our geometry uh we can see that it actually clashes with our case and to remedy to that we will again use a shape binder so hide our last pocket so let's go ahead and select the faces that we want i will switch the selection on top option to help me a little bit with this selection always press the control key to select multiple faces and we need these ones we will create a new shape binder based on this geometry let's hide the pie geometry and hide the list pocket and by selecting the last binder we will make a pocket we choose to be symmetric to plane five millimeters and we will give it a 0.2 millimeter feet tolerance we can hide the preview press ok and now we have a nice cutout for our front parts okay so let's go ahead and create pretty much a similar thing for the other ports present on the board so create a new sketch this time i wanted to i want it to be on the xz plane [Music] [Music] and perhaps this can be 2.5 millimeters we have a fully constrained sketch let's close the sketch unhide our last pocket we will pocket again show preview dimension through all and of course we wanted reversed press okay and we are pretty much done with this side also so we have one more more port to to do and it is actually the sd card slot so select nothing create a new sketch i want to make a new and yz plane let's hide our last pocket close the sketch unhide our last pocket and as before let's pocket through all press ok and we will see that the sketch actually pockets from the yz plane through all the model to remedy to that we can actually move the sketch and that will also move the start point of our pocket and i actually need to work with the attachment offset so in the z direction i need to move it if i can see it okay do something like -30 and we we do that we can see our pocket updated in real time this is the part where the refined property set to true now become becomes important if you remember we've talked about it at the beginning of the tutorial and if you don't have the refined property for the features set to true by default you can always select of a particular feature and you have the refined property you can enable it or disable it on a per feature basis anyway we need to have it set to true select the top external edges of our case and let's create a shape binder it is important that the make face property is set to true have the last shape binder selected make a pad we want to make a bed for two millimeters i want it to be to the inside so i will reverse it click ok and we have made the top of our case at this point make sure that the selection on top is enabled select the external vertical edges of our case and make a fillet of four millimeters press okay now select a random edge and because we have selection on top enabled we can actually select the inner edge of our case let's make another fillet and this one needs to be 2 millimeters press ok i want to have a nice angled top and bottom edge so i will select one of the arc i will select the two arcs here and i want to make a chamfer on the selected edges a one millimeter chamfer works for me so press okay i also want to have some nice chamfer on these uh cutouts for the ports so select this edge this edge and this edge here so we will make a chamfer it will fail because the value is too big so we will try back with 0.5 millimeters and we slowly add the edges that we want to jam so i'm pretty happy with the result press ok select the master case object ctrl d to control its appearance we will toggle off the transparency ac on your keyboard to hide the axis cross and let's turn on the shadow to admire our model in all his glory so this is it for part one for the uh so this is it for uh part one of the tutorial in the next part we will try to create a fairly complex uh cut out shape for the two halves of our raspberry case thank you for sticking till the end and i'll see you in the next one you

Channel: OficineRobotica

Views: 32,847

Keywords: freecad, partdesign, realthunder, linkstage3, 3dcad, free, cad, opensource, development, fusion360, alternative, modelling, 3dprinting, 3d printing

Id: OWNrYvxpG4k

Length: 26min 56sec (1616 seconds)

Published: Sat Apr 24 2021