Questions tagged [cad]

Computer Aided Design (CAD)

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1answer
324 views

How can I convert STL files into PDF drawings?

Does anyone know of an easy and free way to convert my STL models to a PDF drawing for CAD and metal CNC machining? I've created some great designs that are all STL files and want to somehow send ...
0
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1answer
83 views

3D scanner for both replicate and quality control 3D prints

I've switched to industrial 3D printing. I use 3DSystems Flex 100 printer. As I print high detailed parts soon I've found out that I have to use quality control. Software is not a question. I use ...
2
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2answers
378 views

How to write arcs directly in G-code?

How can I write G-code for a triangle without sharp tips? I want to generate the corners manually, rather than using a slicer to generate them, just to know how it is done.
2
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1answer
76 views

How do I keep the .stl files from being resized while exporting?

I made a few models in Autodesk Inventor. When I tried to get them printed, the printer created a model smaller than the model I made in Inventor (270mm x 200mm). Is there a way to keep them from ...
2
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2answers
286 views

Hollow wing for rc plane

I am trying to print a wing for a rc plane with my 3D printer. In order to make the wing as light as possible I need to hollow it (and afterwards put some stable structure there). I've tried the ...
4
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3answers
1k views

What is the point of diminishing returns on the STL refinement level in Fusion 360 on an Ender 3?

When exporting an STL from Fusion 360, one must select an STL refinement level to use for calculating the maximum triangle count. For FDM printing (0.05mm and above layer heights), where is the ...
3
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4answers
478 views

How can I have a large 3D printed object?

I have a concept that's roughly 18"x30" (about 457x762 mm), and I just realized that the Makerbot and similar printers only allow dimensions around the size of a piece of paper. What are other options?...
9
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1answer
173 views

How to add “skin” to a Voronoi shape?

Suppose I'm given a shape with a Voronoi pattern, such as this lamp. I'd like to be able to add a "skin" which covers the complete shape on the inner surface so I could print it with translucent ...
5
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1answer
1k views

How do I compute the surface & volume of a large amount of STL files?

Please, how do I compute the surface & volume of a large amount of STL files ? I have over 3000 STL files, and I want to know their respective volumes and surfaces. I will use this data to be ...
5
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2answers
2k views

What is the difference between STL and OBJ files and which one should I use?

One of the CAD programs I use is called TinkerCAD, which lets you export your design in either STL or OBJ form. What is the difference between these two file types? And which one is better to use?
4
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6answers
2k views

STL to STP CAD Conversion

Does anyone know of a good way to convert a 3D print file, like STL, to STEP - a useable file format for plastic injection molding companies? I have tried to convert the files through a couple of ...
1
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1answer
535 views

Make smooth curves in GCode

I am getting started with GCode, and I don't know all the commands. Is there a way to smooth a path between two points? I wrote a program which makes GCode from a silhouette. Problem is, when it looks ...
5
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3answers
1k views

In Fusion 360 how do I select an entire 3D object, not just its sides or faces?

I'd like to mirror a triangular prism I made. However, whenever I select it I am only able to select the faces or sides. Is there a way to select the whole 3D object to move or mirror it?
5
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1answer
731 views

Can the `render` function be used to speed up rendering?

I am designing a moderately complicated piece in OpenScad. It renders fast enough in preview mode (1s). But when i do a full render so I can export to STL, it takes ages (In the 10s of minutes) I ...
4
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2answers
388 views

How to modify 3D model of body?

I'm relatively new in the field of 3D printing and design. By now I've created and printed some technical objects with TinkerCAD, but now I've a task, which I don't know how to solve. I have the ...
4
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1answer
2k views

How to design a worm-gear in FreeCAD?

I want to print worm gears for my robot arm. I would like to design it in FreeCAD. Normally, I would use involute gear for regular gears. However, this tool cannot be used for worm gears. I can't find ...
1
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1answer
75 views

I am looking for laser cut cads for my prusa i3?

I have this prusa i3 printer(I don't know what model is it): My bed part is broken. And I am looking for the cads to laser cut them! this is my bed pic:
6
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3answers
324 views

FEA in 3d printed solids

I would like to get a pretty accurate method to do finite element analysis (FEA) on my 3d designs considering the infill. I use Autodesk Inventor to design parts but the FEA can only be applied to a ...
3
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3answers
522 views

How to concave a cylinder with Onshape?

If I have a 3D cylindrical extrusion (in Onshape), how can I scoop, carve, or indent a concave/parabolic curve in one of the ends? The yellow surface is the target. Here is the basic shape I'm ...
0
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1answer
73 views

Is B-REP a ready to print mesh

before a mesh can be printed it needs to be 'repaired'. According to most tutorials that is including making the shape close and removing inner shapes. Reading through B-REP in Wikipedia there is no ...
2
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3answers
542 views

Converting a mesh to constructive solid geometry

I have a mesh of a bowl that has the perfect shape of half a sphere. I want to easily convert it to the containing sphere solid and a box solid that will be subtracted from it. Googling mesh to solid ...
2
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0answers
117 views

Plastic most closely mimicking Ultem in Autodesk Inventor

I'm trying to run a stress analysis on an assembly of parts that will be printed in Ultem 9085 (on a Fortus 400MC). I am trying to find a plastic that most closely mimics the material properties of ...
7
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3answers
5k views

Can a 3D model of a copyrighted work be rendered legally without infringement?

I know this is still gray territory and it is asked so many times within the 3D printing and maker community but I'm curious about the limits of 3D models and were it touches on Free Use and ...
1
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2answers
373 views

Can I design or remix a model in SketchUp Make and legally share it via Thingiverse, MyMiniFactory or similar?

SketchUp Make is licensed for non-commercial work only. This includes the output from the software. Trimble Navigation Limited and/or its affiliates ("Trimble") gives you a personal, worldwide,...
5
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2answers
385 views

Mesh/Geometry quality

tried searching but couldn't find anything. I do not have a 3d printer so can't really experiment on my own, which means that when I am going to order a 3d print I want to get it as good as possible. ...
5
votes
2answers
102 views

Resources/methods to construct STL files using disparate parts using OpenSCAD

What resources or methods would OpenSCAD users suggest to piece together disparate STL files? I'd like to take an existing STL model-library of STL parts (head, torso, arms, legs) and make it a ...
3
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1answer
130 views

Converting Injection Molded STLs to printable STLs [closed]

I bought a 3D printer kit a few years ago, and it's been working pretty well, the kit was made with injection molded parts. -- It's similar to a Huxley, and through the years, it's started to turn ...
2
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1answer
331 views

File Input data types

I'm a newb and don't know much about 3D printers. In visual basic I can create vector data of 3d objects,that can be loaded into a binary or text file. Can files like this be used with a 3d printer? ...
14
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6answers
830 views

Choose infill percentage

Since I'm running a 3D printing facility of an engineering school, students are always wondering how much infill percentage affects the stiffness of the part. I know that it is impossible to get a ...
2
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2answers
287 views

Scan to vector?

I have some design diagrams only on paper. Scanning them to bitmaps is easy, but I've had no luck getting useful vectors out of them. I've tried vectorizers in programs like gimp, and a few online ...