Questions tagged [cad]
Computer-Aided Design is the use of computers in the engineering design process. It involves drafting, modelling, simulation, optimisation, and creation of technical documentation. The term CAD is often used to denote software for computer-aided design.
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Activate a mechanical end-stop with a lever
I would like to be able to record the motion of the shafts on a loom. I have some mechanical end-stops, and would like to trigger them with levers that raise and lower when the treadles at the base of ...
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How do I unminify a DXF file that appears to be minified?
I have tried so many different programs to convert this file to correct, but what I have is a DXF of an eagle. It appears to be minified in some fashion or created in some non-standard CAD program. ...
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What software was this designed in?
I'm trying to to teach myself to design gears for a hobby project, and I want to make a similar design. I typically use Autodesk inventor, but I was wondering if there was something better for this ...
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Solar panel locaiton with plex-earth and virtocad
I need to use Plex-Earth and VirtoCad to solve a solar panel positioning problem. I am on BricsCad.
I have a kml for a boundary area.
How can I, using these softwares, get the following groudn mount ...
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What are the positions/diameter of the anti-rotation bumps on this mechanical drawing?
I am designing a front panel for an electronic device with PCB-mounted components on it. I need to provide precise CAD geometry for drill holes, etc. to the third party that will mill / manufacture ...
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Create a mechanism to support a speaker in the upper part of an enclosure
I am working on an electronics enclosure.
There will be two parts, the main enclosure and the lid that gets screwed.
In the upper lid, I want to have a support for a circular mini speaker.
The speaker ...
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What elements should I include in a manufacturing sketch?
I have created a model of a tea strainer in fusion 360 for this (https://www.taotealeaf.com/tao-tea-tumbler/) tea tumbler of which I would like to fabricate a prototype. I will most likely make it out ...
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How do I complete this tolerancing problem? Can someone walk me through Part 1?
I have been trying to solve this using rules of Basic hole and Basic shaft calculations but I keep getting it wrong
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How to draw a quarter turn cam
I am trying to make a 3D printed cam for a quarter turn switch in OpenSCAD. The mechanical stops are trivial, low dwell and high dwell no problems (concentric circles), but I cannot figure out how to ...
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Not able to make enclosure in DesignModeller
I have a Fusion 360 model that I imported into ANSYS Workbench Fluent as a .step file. I want to make an enclosure around it but it is giving me an error. The error doesn't occur if I choose just any ...
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How to model this object?
I'm trying to make a 3d model of this showerhead holder
I did this STL file using cadquery:
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How should I customize screw threads in my CAD design?
I'm designing a small tea strainer in the shape of a cylinder that goes into a glass bottle, which is also shaped like a cylinder. Currently, I'm still designing it in Fusion 360, but I'm facing one ...
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How big should the gap between holes be in my CAD design?
I'm designing a small tea strainer in the shape of a cylinder that goes into a glass bottle, which is also shaped like a cylinder. Currently, I'm still designing it in Fusion 360, but I'm facing a few ...
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How to prevent water droplets from staying on stainless steel / glass surfaces?
I'm designing a small tea strainer in the shape of a cylinder that goes into a glass bottle, which is also shaped like a cylinder. Currently, I'm still designing it in Fusion 360, but I'm facing one ...
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Designing a tea strainer: What should I do first?
I hate to ask a somewhat broad question, but here I am with no one else to turn to 😅. Specifically, my question is: What should I do first?
Let me explain the context to make my question a little ...
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Tolerances in the manufacture of mechanical parts (plastic)
It is necessary to make an adapter ring for connecting the smartphone to the microscope eyepiece (turn from ABS on a lathe, or 3D printing). Microscope eyepiece diameter is 33mm.
What should be the ...
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Jibs fastening in a frame structure
I need to make a demountable frame for cycling trials:
I want to make it based on steel profile square tubes:
The design must have variable dimensions and slopes. I guess provide variable dimensions ...
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Mechanism for turning a thumbwheel potentiometer
I am trying to devise a method (3d printing or injection molding) in order to turn a potentiometer via a thumbwheel mechanism.
Take a look at this picture, from an old commercial product that I am ...
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Reverse engineering a thread
I have a thread in an actual product, that I want to replicate in a 3d print.
I have no clue on what to measure, and how to replicate it.
This is the thread:
One possible solution is this: I have an <...
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Seeking example problems solved using Automated Design Synthesis (ADS) algorithms
Premises. Gary N. Vanderplaats and coworkers at the Naval Postgraduate School in Monterey, California developed the Automated Design Synthesis (ADS) algorithms (software) that have been adapted to ...
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Comparison between hand calculations of a continuous beam with FEA simulation (Solidworks)
I've seen many videos and books where statically determined beams' hand calculations are checked using FEA. But why is it that FEA results don't match the ones obtained using hand calculations (in ...
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CNC Mill an Airfoil Shape in MasterCAM
I have this airfoil shape which I created using MasterCam. I used the milling function called MULTISURFACE. When I select the green highlighted spot above, it will throw me an error.
Is there a way to ...
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How is the edge piece made?
Apparently the "CUP HOLDER" has a long history. The 1944 Spitfire cupholder above has me a tad confused about the manufacturing process. I am looking at the encased wired that is running ...
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What reference lines can be trusted and what points are being dimensioned
Based on the dimensions for the fold lines of the part above, the part is not square in the corners. It is my understanding that the short sides are actually at an angle other than 90 to the long ...
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Make Assembly Load Options unique to each assembly in Siemens NX 12
I have a few assemblies I'm working on. For the most part, each assembly is self-contained in its own folder (assembly file and part files). However, there are a number of common parts that are stored ...
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slits and slots
We are designing a part such that it is clamped. We are providing a slit for tube insertion. I need to know how much depth and width we can provide the slit sizing. Here I am attaching the slit image.
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BA Hole Designation
I a previous question I included a drawing for a strut. In this strut drawing it designates a 2 BA Hole in the bottom of the strut. I have seen this call out for many other parts that are part of ...
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Reference constraint from this sketch cannot be used in FreeCAD
I am using FreeCAD 0.20.2 in Ubuntu 22.04. I want to use a reference constraint to set the value of another constraint, but I it does not allow me. Why?
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How do I measure groove separation?
In this drawing it says that each groove is separated by 5deg. Each groove has a depth of .015", the radius of the contour is 0.47"
How do I measure the separation of each groove?
My sketch ...
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How to sweep along just one line?
In fusion 360 when I select one line to sweep along it selects 2 lines instead of one, and the two lines are going in two directions from the area selected to sweep with so naturally the computer gets ...
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Fusion 360 - Unexpected behavior when using deboss on curved surface
I'm including the example file. On one side, the text is debossed as expected. Using the same process for the other side, "Educate, Equip, Empower", the boss seems like it's coming at an ...
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How to Create a Limacon of Pascal in a CAD drawing? [closed]
How to Create a Limacon of Pascal in a CAD drawing for extrusion etc? Need a .STEP file ultimately.
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Hexamesh of a helical coil in ICEM CFD
I am trying to mesh a helical coil segment in ICEM CFD. My approach is to create a 3d block at the start of the geometry, and then extrude it along the center curve:
However, when I do this I end up ...
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Automatic letter connection for plasma cut parts with nested holes
Something I'm consistently running into as an issue is connecting letters so they don't fall out or leave a missing unconnected hole in a letter that is cut out of metal. Is there a way to ...
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In Ansys ICEM CFD, what do these "cube" symbols on the midpoint of block edges mean?
When I was meshing a helical coil, I've noticed these "cube" symbols located at the midpoint of a the block's edges:
Blocks with these symbols tend to have a lot of strange/unpredictable ...
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Stepcraft specific CNC post processors for solidworks cam?
I searched some post directories but I am unable to find any Stepcraft specific posts for Solidworks. I don't have the licenses or money for other products, and I want to be able to do everything in 1 ...
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How does one post process in LS dyna for a seat belt?
Intro: I am looking to use LS Dyna to model a dummy crash.
I have done all the dummy positioning and set up but can not find any tutorials or info on the post process, boundary conditions and running ...
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How to design a gear decoupling system?
I'd like to convert my stupid door lock into a smart one.
I already have a gear for the lock knob. Now I'd like to design a gear decoupling system that will be connected between the knob and the motor ...
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Copy metal sheet component in Fusion
I'm searching for a way to convert my sheet metal into a volumetric mesh or to copy it because I need it twice. I can't because Fusion tells me that because it's a metal sheet it can't be copied.
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How to express one constraint as a function of another with sum in FreeCAD
I have one named constraint, R1, and now I want to define another constraint as R1-5. How can this be done? I been reading here and I manage to make it work with product and division but not sum or ...
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Reference geometry for a 3D arc in SolidWorks
Spherical Parallel Manipulator in SolidWorks
I am drawing in SolidWorks a 3D arc with two holes on the edges. An axis of rotation passes through the center of one of these holes, around which the arc ...
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How to stop gear from wiggling despite connected gear being fixed in place?
I have designed and 3D printed a gear system with three gears. Two identical gears at each end with a smaller gear in the center. One of the larger end gears is to be rotated by a stepper motor, the ...
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What is the relation between metric thread nut hexagon diameter and the major diameter
If we a M12 bolt what will the relation between the major diameter and the hexagon diameter be?
If we calculate it geometrically it should be $E(Hexagon\space diameter)=\sqrt{3}d(major \space diameter)...
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How do I sweep one sketch along another in FreeCAD?
I'm new to FreeCAD, I want to sweep one sketch along another. Here I want to sweep the rectangle sketch along the curvy path.
But it ends up like this when I use Additive Pipe:
What setting am I ...
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CAD: How to model complicated smooth shapes?
I'm somewhat new to CAD and don't exactly know what terms to look for. So far every model I've seen or made is essentially built from straight lines and circle segments or other "primitive" ...
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SolidWorks PDM drawing watermark when referencing older version?
How can you add a watermark on SolidWorks drawings/templates present when the drawing is not updated with the most recent part file? This would be very helpful in order to reduce production errors.
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Are there any tools to revolve a solid on an axis without creating copies?
I am using Autodesk Inventor Professional 2023 for a robotics assembly. I can export the assembly in the picture as a .ipt file and revolve it in a pattern with x repetitions, spread out radially ...
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Autocad Electrical 2022 flags a file as modified even if I just scroll around in it, is there a way to disable that?
I'm new to using autocad, so I'll open up a document, look at it and close it without changing anything, but if I scrolled around it flags the files as modified and asks if I want to save them. It's ...
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Steep gradients spontaneously emerge during convection (discrete approximation)
I am learning fluid dynamics, and noticing an odd problem in my computations which I understand, but wouldn't expect, so I would like to know what I'm missing. I feel like it's something silly.
At ...
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CATIA V5 Teardrop bubble 3D Model
In CATIA V5 I am having difficulties transforming my 2D sketch into a 3d model, I have attempted to use the Multi-sections solid tool but if im honest i am struggling to grasp how to use it. Can ...
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