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Questions tagged [3d-printing]

The process of creating three-dimensional objects out of plastic or other materials using a device similar to a printer.

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6 votes
3 answers
19k views

Is "pitch diameter" the same as the distance between the centers?

I am designing gears in FreeCad, and printing then on a FlashForge Finder. I want to know if the pitch diameter is the same as the distance between the centers of the two gears. Both gears are ...
user avatar
6 votes
3 answers
845 views

How do you make a 3D print with an accurately aligned bore hole?

I am printing a wheel with a 2.5mm hole in the middle to accept a shaft of a motor with a set screw. The problem I am having is that the wheel is always wobbly when spinning (sometimes more, sometimes ...
electricviolin's user avatar
6 votes
2 answers
5k views

What should the size difference be between a lid and a container?

I am designing a box and lid (for a home-made micro computer). Using Autodesk Inventor (Student Version), I've created my box which looks something like this: I plan on 3D printing (ABS Plastic) the ...
Thomas Gerot's user avatar
6 votes
1 answer
219 views

How to prevent vibration loosening whilst maintaining adjustability?

I have some height-adjustment nuts screwed onto vertical threads to support my print-bed for a 3D printer. They are domed nuts and the aluminium build-plate sits on top of the domes, three holes in ...
jhabbott's user avatar
  • 5,970
6 votes
1 answer
185 views

How to calculate the adhesion I need to keep a 3D printed bending part straight?

3D printed parts cool down during printing, resulting in thermal contraction which causes a bending moment and separation from the printing bed. The issue is solved by increasing adhesion to the ...
FarO's user avatar
  • 179
5 votes
7 answers
3k views

Can I use AutoCAD to learn mechanical engineering by DOING (like programming)?

I would like to learn mechanical engineering as a side project. But, I would like to learn in a way similar to programming. Learn by doing. Of course I understand I can't build things automatically ...
MechLearner99's user avatar
5 votes
3 answers
432 views

Snap fit on an enclosure

I am designing an enclosure, and top and bottom should be linked thanks to snap fit. I have to use 3D-printing to make both parts. The material is ABS. I made some trials, but they keep breaking. I am ...
Mathilde's user avatar
5 votes
2 answers
574 views

Evaluating performance of heat sink designs without finite element simulation

I have the opportunity to do a few metal 3D prints for just the material cost, and would like to experiment with the performance of heat sink designs (mostly for fun). Since I have no experience ...
PlasmaHH's user avatar
  • 161
5 votes
1 answer
479 views

How do you create a chamfer in 3D CAD that joins the edges of two different shapes?

I am trying to make a 3D model. It consists of a cylinder resting on an extruded ellipse as you can see in the picture below. I now want to join the top edge of the ellipse with the top edge of the ...
PJazz's user avatar
  • 209
4 votes
4 answers
2k views

Why are many compliant mechanisms only flexible in the joints?

I've been playing around with 3D printing some compliant mechanisms, mostly to get precise linear motion, and I've noticed that many commercial compliant mechanisms are often designed like this: ...
Beacon of Wierd's user avatar
4 votes
1 answer
301 views

Are ABS/PLA too volatile to be used in cryo vacuum?

I need to use a custom part inside high vacuum (cryo vacuum), for example as a shadow mask. If PLA/ABS are not volatile, I could just print the part I need. The question is, are ABS or PLA too ...
Sparkler's user avatar
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4 votes
1 answer
1k views

How to secure a rotating disc so that it has no wobble

For a 3D printing application, I need to have a spinning disc(that I will rotate via geared stepper motors) that will wobble as little as possible. By wobble, I mean that it will only rotate around it'...
James Baxter's user avatar
3 votes
2 answers
261 views

How to hold electrical wires on a part?

We are looking for a solution to hold two Power cables on a 3D printed part. This part is installed in a vibrating environment. So we need the cables to be pressed not to move and not to transfer ...
Mathilde's user avatar
3 votes
3 answers
235 views

Why is 3D printing with metals so uncommon?

What are the differences between the processes of 3D printing with plastics versus metals? Why is metal such a problem? There are plenty of metals with low melting points. And AFAIK metal can be ...
Jodes's user avatar
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3 votes
1 answer
127 views

Where can I find technical drawings for computer parts?

I want to 3d print a custom computer case, I have the skillset to do so, however, I do not know where to find the technical drawings required. I need drawings for a 280mm Radiator, an ITX Motherboard, ...
ManquX's user avatar
  • 33
3 votes
1 answer
234 views

Simple and easy Open Source CAD tools for basic 2D and 3D designs [closed]

We are planning to start a basic course on Computer Aided Designs (2D and 2D) for high school kids. The idea is to help them shape their innovative ideas into something tangible. We shall finally ...
gpuguy's user avatar
  • 131
3 votes
2 answers
341 views

Implementing PID feedback control

I'm a Junior computer engineer working on a project involving a 3d printer. It is a mobile printer with the print head attached to wheels which move along the x,y axis of the surface it is printing on....
Jay's user avatar
  • 33
2 votes
3 answers
104 views

Small scale manufacturing [closed]

Some background: I am working for an ed-tech startup and we are hoping to release our first product soon but have been hitting a lot of hurdles with our current manufacturing strategy. We want to ...
Ryan Dehmoubed's user avatar
2 votes
2 answers
986 views

How do I calculate the strength to weight ratio of a material

I want to manufacture something using metal 3d printing. And I'm now choosing the material. Stainless steel is stronger but much heavier than aluminum, so I want to calculate which material can ...
Zyleyus's user avatar
  • 31
2 votes
1 answer
166 views

Fuzzy texture in soildworks

Is there a way to add a "fuzzy" texture to a body in solidworks? Something like this: The purpose - to 3d print a body with a fuzzy surface to get better bonding Any other ideas to improve ...
Simon's user avatar
  • 115
2 votes
3 answers
160 views

Prototype for Injection Molding

Mold for Injection Molding is very expensive and is justified for mass production. However, at Prototype stage, how we make the same part with less expensive method. I know 3D Printing is a way but ...
Rehan Jamshed's user avatar
2 votes
2 answers
2k views

Sealing a rotating shaft in a 3D-printed part

I need to seal a rotating shaft that protrudes through a wall in a 3D-printed enclosure I am designing for a school project. The enclosure is for what will be a small generator that will be used in ...
MaggieMay's user avatar
2 votes
1 answer
38 views

3D printed houses and energy efficiency in Germany

I have just learned that in Germany you wouldn't be able to print a house because of existing rules, especially regarding energy efficiency. Isn't it possible to print an insulating inlayer to fulfil ...
J. Doe's user avatar
  • 141
2 votes
3 answers
255 views

Can photopolymers from 3D printer be fused together like for thermo plastics?

I'm considering getting a SLA 3D printer, but the big uncertainty is whether I can build large things like propellers by printing them piecewise and fusing them together like you can with ABS and ...
Yale Zhang's user avatar
2 votes
3 answers
543 views

Easily accessible material for maximum grip on a prosthetic hand?

Currently in the process of developing a 3d printed prosthetic hand and I am in need of advice on the type of rubber (or other material) we should use at the finger tips to give it more grip. The hand ...
kang's user avatar
  • 21
2 votes
0 answers
483 views

How to design CAD bevel gears from known outside diameter?

I'm working on a problem where I need to design and 3D print bevel gears to fit in the inside of a box and transmit a gear train around the inside corner, as roughly illustrated by the cross section ...
Adam's user avatar
  • 21
2 votes
0 answers
151 views

Stretch part of object in Autocad or 123D Design

I'm quite new to using 3D Drawing programs, except a bit of work in Google's Sketchup. As I'm trying to draw a model that should be 3D printed, and heared that Sketchup is kinda bad practice for this, ...
Roel Balink's user avatar
2 votes
0 answers
172 views

What material for DLP/SLA 3D printer bottom window?

What material is used for the bottom window of 3D printer that the cured resin layer does not stick to and that it is transparent to the uv (365 nm) light? And what material is used for the top plate ...
doker's user avatar
  • 121
1 vote
3 answers
168 views

Why didn't 3D printing become a standard commodity after around 2012?

Around 2012, you had big news coming out about 3D printing: Things like replacement body parts being produced for about 1% the cost, individuals being able to produce guns off the printer, etc. You ...
Panzercrisis's user avatar
1 vote
2 answers
454 views

Eject Circuit Board From Jig

I have a jig I am working on that accepts a circuit board. When the lever is pressed I would like the board to be ejected to the left - as shown in the image. What I am finding is that the board is ...
Andy's user avatar
  • 119
1 vote
2 answers
448 views

How is the table of a 3d printer called?

There is this table, flatbed on the 3d printers. I need such a table which can move up and down, and I firmly believe there are such components on the market, but I can't find anything because I am ...
Gregory Kornblum's user avatar
1 vote
2 answers
174 views

Can wet welding be done in mineral oil?

I'm interested in knowing whether or not submerged welding can be done in fluids other than water, specifically mineral oil in this case. The reason I want to know is that I'm looking into designing ...
Gabe's user avatar
  • 13
1 vote
1 answer
651 views

Help understanding this dimension sheet

I am trying to currently model a few parts for my custom 3D Printer. I have found some flanged lead screw nuts i'm going to use, but i'm having a hard time reading the dimension sheet. Specifically, ...
user3841476's user avatar
1 vote
3 answers
406 views

Achieve mechanically water tight snap-in-place joint

I'm not sure how to ask it but i'll try I want to 3d-print 2 half spheres with a screw cap that then can be clipped once (can't un-clip later) And can be filled with water (lets say its food safe, i'...
Simon's user avatar
  • 115
1 vote
2 answers
691 views

How to water seal a metal plate into the wall of a plastic water tank?

I have a 10 x 10cm square plate of metal I would like to insert into a hole in the wall of plastic water tank (cube shape), I'm planning on 3D printing the tank itself (only 1-2 litres). What would ...
Hotjam's user avatar
  • 13
1 vote
3 answers
366 views

Mechanical joint that break at specific force

I am designing a joint which I want to break at a specific force. I want to design a 2 parts connected by a joint that breaks when a certain amount of force is applied and thus prevent any damage to ...
Shaurya K. Panwar's user avatar
1 vote
1 answer
808 views

Difference between perpendicular and transverse loads?

What is the difference between perpendicular and transverse loads? I saw this on a forum for 3d printing, but I couldn't find any online explanations on what the difference between both measures of ...
Ethan Owen's user avatar
1 vote
1 answer
410 views

Are 3d printed gears (ABS) suitable for long term use?

i want to print a worm gear for a robot. This robot will work every day for at least 10 hours. The gears size is about the half of a sheet paper. I searched the internet for example in industrial use....
user avatar
1 vote
0 answers
170 views

Optimizing fully 3d-printable shaft detent/index mechanism

I am building a vertical-mount deployable tool storage device. Normally, it is in the "locked" position, but when I turn a knob, it becomes unlocked, unfolds, and the tools inside can be ...
Dragongeek's user avatar
1 vote
0 answers
41 views

Open 3MF File in another Program With Macro

I made a macro a few months ago to save a .3MF (alternative file format to .STL for 3D printing) which I love, but I'd like Solidworks to Auto-open the 3MF with PrusaSlicer when the file is saved. Is ...
Nathan Eads's user avatar
1 vote
0 answers
24 views

Question about tensile test of model from research paper [closed]

In this paper they made a tensile force test on their four different models with four different pore size structure to show that pore size is not affecting on the tensile force. But it seems that they ...
Stainless Steel's user avatar
1 vote
0 answers
669 views

Calculating Z-axis Torque on a 3-D Printer

I recently built a large CoreXY 3D printer and I am wondering if my 4 z-axis stepper motors combined will have enough torque to accelerate the build plate with a heavy 3d print. During the building to ...
Feynman137's user avatar
1 vote
0 answers
202 views

What are the limits of small 3D printed gears?

How much tangential force should I expect a 10~20mm pitch diameter/1.5mm gear module 3D printed rack and pinion system to support without breaking nor sliding?
curioso's user avatar
  • 31
1 vote
1 answer
579 views

How to build a pivot linkage for a robot.

I have asked this question in 3DPrinting.stackexchange forum but got no answer answer. Please take a minute to see if you can help. I am building a simple RWD vehicle using 3d printer parts. See the ...
user6120's user avatar
1 vote
0 answers
67 views

What is the maximum degrees per step of a stepper motor for a 3D printer?

I am making a reprap rostock (delta style printer) and I am trying to use as many parts I already have as possible. The stepper I have are 7.2 degrees per step. Even with microstepping, would this ...
electricviolin's user avatar
0 votes
2 answers
88 views

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 <...
user1584421's user avatar
0 votes
3 answers
82 views

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 ...
Osz's user avatar
  • 13
0 votes
2 answers
82 views

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 ...
Andrew Jackson's user avatar
0 votes
1 answer
34 views

Query regarding use of PLA in 3D printing

Just a general question for engineers who have been working with 3D printers, what type of alternatives are available for PLA? Are they efficient (economically or quality wise) than it, if yes then ...
Qwerty's user avatar
  • 101
0 votes
1 answer
48 views

How to engineer a click from small concentric discs

I am designing a device which clicks when rotated so as to wake up an accelerometer, allowing the device to run on low power and wake to take a reading. I have access to SLA and FDM 3D printers. When ...
Jaspal Singh Rathour's user avatar