# 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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### How to do maths for total gear ratio to predict 3D printed high torque high reduction planetary mesh generator?

I found a video of a guy lifting wheels and anvils using a 3D printed gearbox, so I've found a mesh generator that can rapidly produce custom gears based on that design. I found a math walkthrough ...
41 views

### Calculating Gearing Ratio from Constrained Rotational Linear Arc and Horizontally Opposed Rotation

I'm 3D printing an aircraft throttle unit as a POC and am trying to calculate the gearing ratios that are required in order transfer the full range of linear motion into a directionally opposed sensor ...
17 views

### Method to calculate required gear size and teeth size for a rack system for a certain amount of travel?

high school amateur engineer- and first-time poster- here. I'm making a Nerf automatic springer system, and I want to model it. However, I don't know what size rack and gear system I need. I need 60 ...
68 views

### Stability of lattice or mesh supports for printing

Support structures like lattice supports, tree supports or wire supports are being widely used in metal printing or FDM as they minimise the wastage of material and power consumption. In addition, ...
606 views

### 3D printer printing out cotton-candy like material after repeated use

I recently purchased a JGMaker Magic 3D printer. It worked well for about 3 months [first picture], but now it is having a lot of trouble. As you can see in the images below, when printing new pieces, ...
28 views

### What would be a good way to connect parts that would be replaced on a training model?

I'm trying to work on a training model for neurosurgery. Residents will be operating on the posterior part of the model, and it needs to be replaced after each training session. While the anterior ...
74 views

### Why sometimes it is very difficult to tighten the screws when threaded inserts are used?

I designed a part using CAD software to combine it with a mechanical component which already has holes on it. The locations are correct as I have the CAD file for that component from the manufacturer. ...
25 views

### SOLIDWORKS: Is there a way to convert a Section View into a new part?

I hope this is the correct place for this question. BLUF: is there a way in SOLIDWORKS to convert a Section View of a part into its own new part; alternatively, which features/tools of SOLIDWORKS ...
47 views

### Stuck Allen bolt in e3d hotend

I was having bed leveling issues, so I wanted to make sure I had my x axis level. I moved the z axis right to the top so it would align itself. But in the process, I must have ripped the cable clean ...
75 views

### Ideal way to create internal thread for 3d prints

I created a two piece case for an electronics project. The pieces are joined with M3 screws. The screw enters a 3d printed cylinder. In order for the screw to secure itself, it connects to a nut I ...
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 ...
26 views

### Can you heat the air in a box to heat plastic inside box?

I am working on a project where I need to heat the air inside a box to heat up a 3d print inside it. As of now, I am using a heat gun to heat up the air. I was wondering two things: How can I add hot ...
128 views

### 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 ...
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 ...
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 ...
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 ...
47 views

### How to model this object?

I'm trying to make a 3d model of this showerhead holder I did this STL file using cadquery: ...
42 views

### 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 ...
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 ...
42 views

### 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 ...
88 views

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 <...
39 views

### I'm wondering if the parts I have ordered to be vacuum casted and made have instead been made using 3D printing

The reason why I'm asking this in the first place is that I have observed striations on the parts I have received. I was under the impression that vacuum casted parts would not have striations that ...
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 ...
101 views

### When should a bolt and hole be tapped at an angle, if ever, from a structural/strength standpoint?

Assuming the head of a bolt makes proper contact with its surface and clamps properly, and tapping an angled hole is not an issue, when would an angled bolt and hole (relative to the primary surface) ...
1 vote
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 ...
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 ...
22 views

### Building CAD Models for simulations and 3D Printing

Is there a tool that allows you to make changes to models so that they can be used for both 3D printing and static simulations in SolidWorks. For example, I want to have a part printed and to deal ...
16 views

### For a given a molten metal (say copper), how do you determine the best material for a 3D printer flatbed? What about circuit board?

Suppose we had a 3D printer that can spew molten metal out of a 0.1mm hot nozzle and that we can control the heat at the last 5mm of the Tungsten hot nozzle's tip. I'm wondering then how would you get ...
29 views

### How are 2D views from a 3D CAD Model stored in STEP-File with Boundary Representation generate for engineers to define details? And why?

I am new in this topic and need some help. There are 3D CAD models (stored as STEP Files with the boundary representation) and some engineers need 2D views of these models for further processing. With ...
661 views

### Solidworks - The protrusion disappears when I enter into sketch mode? What am I doing wrong?

I am fairly new to Solidworks but know basics of it (basic only). The have made a shape (which I have 3D printed as well), but I need to change the dimension of the protrusion now. Here is the design ...
67 views

### How should I split this part into two?

I’ve attached an image of a part I manufacture using 3d printing. I start with gold filament before switching to black mid-way. I’m hoping to simplify production by printing this as two pieces instead ...
1 vote
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 ...
56 views

### Does this CNC machine exist?

About ten years ago I had an idea for a cnc machine that was meant to basically use multiple axis to airbrush finished milled or printed 3d objects. I still have my detail drawings i worked up for it. ...
80 views

### XL timing belt missing Dimension!

I'm trying to design and 3d print a XL pulley. I think there is a missing dimension that I can't find in the spec tables. we've got pitch circle, teeth height, belt thickness... but I can't find ...
1 vote
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'...
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 ...
1 vote
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 ...
1 vote
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 ...
1 vote
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 ...
1 vote
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 ...
27 views

### Is there any cost effective static stress simulation for rapid prototyping (FDM / 3D-printing)?

I've been using the static stress simulation (computed locally) which, until recently, has been free with the Personal licence of Fusion 360. Is there a reasonable alternative? The cost that Autodesk ...
1 vote
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 ...
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: ...
1 vote
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?
56 views

### Polypropylene material characterization

I'm trying to make an evaluation of the available 3D printing options of polypropylene and I'm having difficulties comprehending material characteristics that make PP PP-like. I realize this sounds a ...
37 views

### Sizing a spring

I am attempting to 3D print my own Quad lock mount and require a spring. I've taken some measurements but don't know how to search for where I can buy more springs. Dimensions: 12mm height, 20mm OD. ...
47 views

### Recommendation of different materials for 3D printing flexible parts

I am planning to 3D print this part from solidworks. I am hoping to achieve a good level of flexibility with the clasps in this part. Thin circular arc in the Top drawing. and Wider circular arc in ...
194 views

### How to use mesh as a reference object in Solidworks?

Suppose I want to design some device against a scanned 3D model like eyeglasses. I have imported STL model and drew a reference plane by three points of it. I can ...