Questions tagged [3d-design]

3D design (or modelling) is the process of creating a three dimensional digital representation of some object that, for instance, can be 3D printed.

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How to create an air-free design?

I am creating a bottlecap-like design. The design is sealed by rotating the lid. I am adding a chemical to it for an experiment. I would like the inside of the design to have no air circulating to it ...
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Is 3D printing really just 2D printing? Because only 2 motors move per layer

I was wondering the other day why don't all three motors move at the same time? Don't normal paper printers move 2 motors at a time? they're 2D printers. It makes sense if a 3D printer really does ...
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How can we control the airflow in a fan which can be 3D printed?

I am new to 3D Printing and I have taken up a summer project. The project requires a fan 3D Printed, If I use a normal fan the airflow will make my project (i.e. a air-propelled car) go backward. Can ...
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Source of design advice for modeling functional parts [closed]

Where do I go for deeper knowledge about 3D printing functional parts? I want to up my game a bit and design some more functional parts. In particular, I want to do more with boxes, organizers, and ...
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Recommendation for free, intuitive offline 3D modeling software for 3D printing [closed]

I've used TinkerCAD (https://www.tinkercad.com/) and was able to easily model objects for 3D printing, despite having no prior experience in 3D modeling. However it needs to be connected to the ...
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4answers
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Cura messes up my print. How can I make it print what I see in Blender?

I'm using Cura and it removes my holes and deletes sections of the print and disconnects parts. In Blender it looks as it should be, as I designed it. I know there are a few mishaps inside (not ...
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1answer
53 views

OpenSCAD render (F6) fails with “ERROR: CGAL error in CGAL_Nef_polyhedron3()”

I built a model and it previewed correctly. When rendering for STL export (F6), I got an assertion error: ERROR: CGAL error in CGAL_Nef_polyhedron3(): CGAL ERROR: assertion violation! Expr: e->...
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54 views

Can 3D printer models be used in video game engines and vs versa?

If someone creates a 3D model of a character for 3D printing can I import that model into Unreal engine or Unity 3D for use in a video game? Also is the inverse true? Can I get 3D model of Mario and ...
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1answer
180 views

File too big to open in Tinkercad. How can I shrink it?

I need to shrink an STL file below the 25 MB threshold, so I can open it in TinkerCad. I don't care about quality, I just need it shrunk. How can I do this?
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81 views

How to 3D print a shopping cart

I need to find a way to design and build a real shopping cart for my project. I have not idea where to start from but I'm thinking maybe I can 3D print the shopping cart which will allow me to quickly ...
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3answers
144 views

How to accurately print a thin piece with a hole pattern

I'm quite new to 3D-printing. I need to build a curved piece with a hole pattern and I was wondering whether it was possible to print such a hole pattern accurately, with such a thin (3 mm) thickness ...
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105 views

Which 3D printer to print heat-resistant material?

I need to print a rotor for a DC motor I'm designing. In the process of testing the behaviors of the motor performances, I would need a material that will not deform at a temperature range between 100 ...
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2answers
119 views

Improving print speed by adding holes

Let's say, I want to print a box for putting game tokens in. It is an empty cube, but the top layer is missing. I do not need full walls. It could have holes in it resulting in a mesh structured wall, ...
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29 views

How to create free shapes in tinkercad?

I bought a 3D-printer (I love it!!) and now I'm creating 3D-designs with Tinkercad. I'm (obviously) a beginner and I'm now trying to create the bow of a little boat for which I have a specific shape ...
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Hack IKEA Trofast drawers

I'm looking to hack an IKEA Trofast storage unit. It's 3 drawers high (10 cm for each drawer), I would like to make it 6 drawers high, with thinner drawers (4 cm for each drawer). Which means : ...
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1answer
72 views

What effects does the non-carthesian coordinate system have on the Part-design process for printing with a belt printer?

Background: What's a Belt Printer's Coordinate system? For "normal" Cartesian (Portal, Cube) or Cylindrical (Delta) coordinate printers, the same Design Consideratons are to be kept in mind. ...
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2answers
172 views

OpenSCAD not rendering polyhedron

I'm trying to subtract a polyhedron from a cube, but it is not working (the cube remains solid). However, I can see the cut-out poly in preview mode (but not after a full render). Preview -- poly ...
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Water does not flow through 4 mm hole when there is a small amount, how to let water flow through small hole even when there is low pressure?

I have a 3D print where there are 5 holes with a diameter of 4 mm in a cup, and I would like liquid to flow through all 5 holes at once while slowly draining the cup (by slowly I mean: just take a few ...
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1answer
74 views

Vertical 5 mm diameter hole comes out fine, but diagonal 3 mm holes keep collapsing

I am trying to 3D print an object from Shapeways. Confidentiality prevents me from sharing the actual STL files publicly, but what I can say is that it's a shape about 2 cm tall x 4 cm wide x 4 cm ...
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2answers
205 views

When 3D printing a hollow box, what is the best course of action?

If I need to 3D print a hollow box that can not have any light permeating into the box, what would be the best course of action? Should I 3D print the hollow box as a whole or print out the 6 sides ...
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3answers
677 views

Design connection to motor shaft for printed gear

I am currently trying to print a gear with the possibility to connect it to the shaft of a DC motor. The following picture best describes what the shaft of the motor looks like by showing the hole ...
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2answers
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Vertical vs Horizontal shapes printing

first time here. I recently bought an Anycubic Mega S and I'm venturing in the 3D world. Lots to learn for sure. I have printed a few items so far and all went pretty well. My question is about ...
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2answers
107 views

Converting / measuring bottle threads for creating an adapter to it

I'm trying to model the threads of a "Poland Spring" 500 ml bottle so I can 3D print an adapter for it. But I can't find information about it. I emailed them but they said they didn't have ...
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144 views

How does this multiple-curve-beam flexural pivot work?

I found this in Handbook of Compliant Mechanisms (2013), page 162, or at the start of "Chapter 11, Elements of Mechanisms," subsection 11.1.2 Revolute I don't understand how it's supposed to ...
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1answer
42 views

Ready to use objects instead of 3D-printing them [closed]

I hope this kind of questions are tolerated here. Otherwise, please tell me in the comment and I will delete the question - no needs to downvote. For a new job I need to create a lot of objects like ...
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1answer
29 views

Eliminating unwanted internal surfaces

One of the biggest challenges with 3D-drawings is internal surfaces unintentionally formed that cause slicing not to work properly. This is using SketchUp Pro, slicing with Slic3r, and printing with a ...
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1answer
118 views

OpenSCAD / FreeCAD splitting, hollowing and threading model

I had a thought the other day that it's 100 % waste to have either a solid or hollow 3D-printed model in relation to utilizing the space inside of it for different modules, e.g. secret compartments, ...
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58 views

3D printing source material and superglue

I've seen there are several different types of source material for 3D printing. My question is: Which of those would hold up under regular Loctite superglue or plastic model glue? I'm asking because I ...
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837 views

My 3D model is printing with missing parts when sliced in Ultimaker Cura

I have been working hard the last year on the model below. I am new to everything 3D that is modeling and especially 3D printing. I have however successfully concluded quite a good number of 3D prints ...
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1answer
69 views

Best/Simplest/Easiest way to secure a lid

This is a part I designed, a kind of a frame: Into the frame I want to be able to place a flat object of variable (but uniform) thickness - like paper, glass, sheet metal, etc. The inserted object ...
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103 views

Can model used for 3D printing be later used for mold mass production?

I am working on a project that requires an enclosure that I am thinking to prototype using a 3D printer (which is pretty easy and overall awesome). My question is simply whether this same model can ...
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92 views

Is 3D printing useful for making everyday objects or is it more for special hobbies?

Have people been using 3D printing to genuinely create a number of needed objects in their homes, and if so, what? Or is 3D printing better for special niche interests like art projects, home ...
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53 views

Is there a spiral lid mechanism

I want to put a spiral lid on top of a container. When the lid opens, then the spiral mechanism will rotate into the container. Is there a name for this mechanism? If not, would something like this be ...
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1answer
39 views

creating support for a surface

I created an stl file of bathymetry using Matlab and the results can be seen in the two pictures below in Blender. The problem I have is that it is very thin with overhangs. I would like to add some ...
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Print copy of real life object, starting with .mpo file or files

I want to make a 3D printed copy of a real object. I have access to a Nintendo 3DS which is capable of making 3D .mpo files. Is there a straight-forward method to convert these into a 3D printable ...
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2answers
265 views

Help needed to design 3D printer part

I am attempting to build a 3D printer using the Bear Upgrade for guidance. However, I want to modify some of the parts. I am basing the modified parts on the original designs. I would like to ...
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1answer
925 views

Efficient way to create a “mold” of a solid object in Meshmixer?

Currently I have a model of a fingertip finished in my project, however, I would like to create some sort of "cap" that if printed would fit on top of that finger. Is there a good way to achieve this ...
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2k 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 ...
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1answer
62 views

Convert ball-stick model to STL from the command line

I regularly have 3D models that consist of a Boolean union of balls and cylinders (molecule models, star maps, mathematical designs), that I then want to convert to a STL model for printing at ...
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1answer
2k views

In Fusion360, how do I align components according to their a midplane?

In Fusion360, how do I align components according to their a midplane? I have 2 complex objects. They have no midpoint defined (is that even possible). How do I align them according to their mid ...
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2answers
129 views

Attach handle on a loose screw

The handle of a micro wave oven broke. I can't just order a replacement part because I can't even attach the new one. The problem is that the screw heads are somewhere on the interior side of the ...
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1answer
109 views

How can I become a certified Fusion 360 user?

I heard about the certification program from autodesk website. How can I prepare and write this certification exam as a student? I already started using fusion 360 about a month.
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3answers
585 views

Creating “pie slice” in OpenSCAD?

When making a cylinder, sometimes I need to only take a pie slice. I'm currently using this neat trick to make pie slices for angles under 90 degrees. However, I have need of a few angles over 90 but ...
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4answers
514 views

How to decide print orientation?

Please Note: This question is not about the design. It's about deciding print orientation after the design. I have a small, but complex piece which I need to print. Here are two images of different ...
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1answer
161 views

Bevel gears 3D model

Goal : create a pair of bevel gears for 90 degrees angle axles. Context : the gears are designed with an OpenSCAD library (https://www.thingiverse.com/thing:1604369, function 'pfeilkegelradpaar'), ...
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3answers
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A single angle, single phone model windshield mount — a job for a 3D printer?

My end goal is getting high quality dash footage from a 6 month road trip I'm going on. From my research, very few dash cams support 4k 30fps filming, and the ones that do overwrite their own footage ...
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5answers
128 views

3D Print Enclosure

Developing an electronic product for which I'll need an enclosure. It's about 50x30x20mm and should survive higher temperatures (50-60 degrees). Because of the low volume (under 500 required per year),...
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3answers
710 views

Problem in 3D printing of an empty model

I'm new to 3D printing. I modeled an empty bird in Blender (the stl file of model is presented). I tested the model in Blender (using 3D printing tool) and also the Netfabb software. They don't show ...
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4answers
6k views

Do 3D printers really reach 50 micron (0.05 mm) accuracy?

I've always been wondering about the actual accuracy of 3D printing devices. When looking for the perfect machine to buy, I looked at the speed, price, filaments supported etc, but also accuracy. I ...
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1answer
71 views

Rule of thumb for small type

Is there a good rule of thumb for small type on 3d printed pieces? Minimum type size? Good typeface for accurate reproduction?