12/28/2023 0 Comments Openscad loft![]() ![]() I noticed the PCB placement was conflicting with the speaker, so I moved the holders for the PCB to accommodate the speaker. Then I found this model of a speaker and imported it using the same process. Then I moved the mesh to the LED holes and copied it for the other holes. I downloaded the model, combined the bodies, and imported it as a mesh. Then, I found a model for a LED on the Autodesk gallery. I added four cylinders for the 4x2mm magnets, and also inserted this 9V battery model that I found on the Autodesk gallery. Knowing this, I proceeded to model catches for the magnet. These 4x2mm magnets would give us a nice margin of error. For vertical mounting, magnets retain 15% to 20% of their attraction (source in Dutch). I will estimate the additional components, screws, and PCB at 50 grams. The weight of a 9V battery is 33.9 grams. The weight, when printing the model in ABS, was (main part) 55.57 grams + (back cover) 51.2 grams. The model in Prusaslicer after reducing width. I reduced the width of the model by using planes to separate the model into three sections and shorten them. At this point I realized that the model I had made was wider than the print plate of a Prusa MK3. To estimate this I exported the bodies as. For this, I would have to determine how strong they would have to be, which depend on the weight of the device. In order for determining the placement of the magnets, I would have to determine their dimensions. Separating the back cover using an Offset plane. The next steps would be creating a space in which the inner components would be housed. This worked the way I intended and I was left with a body for the main model, and one for the back model. I had extruded the back of the model by 3mm so I created an ‘Offset plane’ and selected the back of the model and set the offset to -3mm. ![]() However, I realized that I would need to create the back of the model as a separate body in order to be able to animate them. I continued working on the model by filleting the corners of the model, which I did by adding a back to the model. The model after adding holes for the sensors, the speaker, and the LEDs. Optical is also an option, but it requires analysis of the images in order to approximate obstacle distance. It seems parking sensors are generally ultrasonic or electromagnetic. (2) Distance sensors, for now, I will use this ultrasonic sensor (datasheet).Using the shell tool in Fusion 360 to create a device case. However, I wanted to use meaningful dimensions, so I needed to determine what type of input/output devices I would be needing. Now, I needed to create the holes which will allow input and output. From the bottom of this solid, I used the shell tool in order to create an outer wall. I create a rectangle, and another rectangle on a offset plane and then created a loft between them. In Fusion, my first thought was to create a similar shape using the lofting tool. Second modeling cycle: shell in Fusion 360 ¶ I decided that I would first spend working on a more detailed model in Fusion 360 before continuing to test other CAD tools. For the next cycle of my development I wanted to use a graphic CAD tool. It is now a solid shape, and does not have room for components, ways to be put together et cetera. This is the basic shape I was trying to arrive at, however, of course, it is far from complete. The model that the above code generates is shown below. Polyhedron(points = case_points, faces = case_faces)
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