26 votes
Accepted

Can I 3D-print a PET bottle?

No, due to 3 reasons PET is not (easily) printable. There is a lot of confusion on what Filaments you can buy: most times filament branded PET is actually PETG, sometimes PETT. PET is not an easily ...
user avatar
  • 19.2k
23 votes
Accepted

Which is more durable to sunlight/weather - PLA, ABS or PETG

Ok, I tried all 3 materials. PLA failed after less then one day, I believe it deformed from the constant pressure and fell out (I didn't find the part but I didn't really search for it, there's some ...
user avatar
  • 2,351
22 votes
Accepted

Is 3D printing safe for your health?

There is very little information about safety available, as home 3D printers are relatively new. However, plastics such as ABS have a long history in making plastic products, and a study found that at ...
user avatar
22 votes
Accepted

How does one use a heat tower?

When you slice an STL of a heat tower, you need to tell the slicer that you need a different temperature at a certain level and maintain that new temperature until another change is requested. The ...
user avatar
  • 30.3k
19 votes
Accepted

How should I clean my extruder when changing materials?

If you feel you need to clean the nozzle the best approach is a cold pull. You can perform this procedure with many printers, however, you should seek advice from your printer manufacturer before ...
user avatar
17 votes

Is 3D printing safe for your health?

Almost all 3D printers have issues that could cause health problems. FDM/FFF printers heat plastic to a temperature that may cause it to off-gas, and these byproducts may not be healthy. SLA ...
user avatar
  • 1,803
14 votes

What are the ideal print conditions for polypropylene?

Polypropylene CAN be printed with excellent results, you just need a good filament roll and good printing setup. A few days ago I read this topic and was kind of afraid of testing it, now I am so ...
user avatar
  • 141
13 votes

Advantages of PETG filament?

I have never used ABS, because I have a young child at home and no ventilation system (just to be safe). I have however used PETG, a crystal clear brand competitively priced on AMA-ssive online ...
user avatar
  • 421
13 votes

Which is more durable to sunlight/weather - PLA, ABS or PETG

PLA would be a non-starter for outdoor use as it's biodegradable and can breakdown in sunlight. Albeit slowly, but won't be useful for long term project. ABS would be a good choice for longevity, as ...
user avatar
  • 1,845
13 votes
Accepted

Improving durability of a printed propeller

As Kezat noted, your part has very low infill, but infill is not what provides most of the part strength anyway. From what I can see of the broken part, it looks like you only have 1 or at most 2 ...
user avatar
12 votes
Accepted

Advantages of PETG filament?

PETG is great stuff to work with. It is stronger than ABS also. It prints slower than ABS and PLA. The formulas vary quite a bit from vendor to vendor. I have used 3 brands, and each of their ...
user avatar
11 votes
Accepted

Why can't powder-based 3D printing techniques create enclosed or hollow structures?

It's not hollow or enclosed structures that are a problem. It's structures that are hollow and enclosed. Think about it. The machine lays down a thin layer of powder, and then a laser fuses some of ...
user avatar
10 votes

Is 3D printing safe for your health?

I am going to address the air issue as it is currently unresolved. the third dimension offers a great answer for common safety issues. The short answer is that based on our limited knowledge at this ...
user avatar
  • 201
10 votes
Accepted

How does this Martian habitat 3D printer built for NASA work?

Let's start with the general design look and feel: This printer contains a robotic arm with a toolhead, pretty similar to a welding robot, and probably is controlled with a similar CAM software. ...
user avatar
  • 19.2k
10 votes
Accepted

PETG layer adhesion

What you describe is usually the result of using a too high of a part cooling fan rotational speed. Like ABS, PETG doesn't require much cooling (if needed at all that is). If you do cool too much, ...
user avatar
  • 30.3k
10 votes

Is there a method for telling how much filament is left on a spool?

If you have an empty spool of the same brand, you could weigh the empty spool and the one you're trying to "measure" to get an approximate weight of the remaining filament. Divide by the (...
user avatar
  • 1,491
9 votes
Accepted

Is it possible to print a resonator for a musical instrument?

I can't answer this from a technical 3D printing angle. But, from a musical angle: Where the body of an instrument has the primary function of enclosing a vibrating air column, the material has ...
user avatar
8 votes

How should I clean my extruder when changing materials?

In most cases, removing the old filament from the printer, inserting the new filament in, and running the new filament through the printer for a short period of time will clean the nozzle. The skirt ...
user avatar
  • 2,198
8 votes

What are the ideal print conditions for polypropylene?

Polypropylene is a bear to print. There's a good reason almost nobody does it. The main problem is that it's a semi-crystalline material, which means it doesn't follow the normal rules for warping ...
user avatar
  • 6,436
8 votes

Which is more durable to sunlight/weather - PLA, ABS or PETG

I might be late to the party, but I have a suggestion. Why not use ASA filament, it's the kind of plastic used in car cup holders, lawn rakes and sprinkler heads, it is both heat and cold resistant, ...
user avatar
8 votes

Can I print in wax?

Yes, you can. But no, you don't need to make your own filament for it, there is one called Print2Cast that you can buy for about 50$/kg. This filament has the following recommended slicing settings: ...
user avatar
8 votes

Is it possible to print a resonator for a musical instrument?

Following up on this, the answer is, yes, this works quite well. I printed this cabaça model from Thingiverse using PLA on a Lulzbot Mini and put it on my berimbau today to test it out. I can't make a ...
user avatar
8 votes

Can commodity 3D printer extrusion hardware and filament be used for injection molding?

Injection molding requires two major components: pressure and heat. So your question can be broken down into those two halves: can your average extruder handle injection molding temperatures, and can ...
user avatar
  • 876
7 votes
Accepted

3D printing related safety precautions for a baby rattle

You're on the right track. Since you asked for "steps" here you go: Step 1. Choose a safe material: Consider chemical safety and physical safety. Food grade PLA should be chemically safe, but ...
user avatar
7 votes

Advantages of PETG filament?

In addition to what @AsaDeDeBuck said, PETG is also more flexible than PLA, and less stinky than ABS. Furthermore, some PETG variants like to accumulate on the nozzle (particulate build up) and then ...
user avatar
7 votes

Advantages of PETG filament?

PETG is great, but definitely not as easy to print as PLA. However the advantages of higher impact resistance, temperature resistance and longevity make it superior to PLA for parts that require those ...
user avatar
  • 111
7 votes

Printing with colorfabb XT fails after several successful layers

This looks a lot like under extrusion caused by heat creep. Heat creep is when the nozzle temperature 'creeps' up through the filament and makes it melt (a bit) and form a blob (or just widen enough ...
user avatar
  • 844
7 votes
Accepted

Design connection to motor shaft for printed gear

Design a different connection to the shaft, however I don't know of any Use a shaft/flange coupler to be fastened to your shaft and to your printed part. Without knowing the length of the shaft, you ...
user avatar
  • 30.3k
7 votes

Improving durability of a printed propeller

I'm offering a different kind of answer, please do not print your propeller blades. I've seen accidents happen (in my past international model aircraft building and flying hobby) with even the bought ...
user avatar
  • 30.3k
6 votes
Accepted

Are there any metals that exhibit a large glass state?

A few things are required for effective extrusion-style 3d printing materials: It must stay where placed by the nozzle long enough to harden (or, alternately for pastes and such, have a shear-...
user avatar
  • 6,436

Only top scored, non community-wiki answers of a minimum length are eligible