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26 votes
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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 ...
Trish's user avatar
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24 votes
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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 ...
Nir's user avatar
  • 2,541
23 votes
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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 ...
0scar's user avatar
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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 ...
LuisOnOff's user avatar
  • 141
14 votes
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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 ...
R.. GitHub STOP HELPING ICE's user avatar
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 ...
Diesel's user avatar
  • 1,905
12 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 (...
Zeiss Ikon's user avatar
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11 votes
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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 ...
John Sensebe's user avatar
11 votes
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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, ...
0scar's user avatar
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10 votes
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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. ...
Trish's user avatar
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9 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, ...
James Hanvey's user avatar
9 votes
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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 ...
Laurence's user avatar
  • 206
9 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 ...
Valmond's user avatar
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8 votes
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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 ...
Chris Thompson's user avatar
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 ...
Ryan Carlyle's user avatar
  • 6,616
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: ...
iFreilicht's 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 ...
Sean Duggan's 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 ...
Nach0z's user avatar
  • 921
8 votes
Accepted

Are 3D prints safe to touch right after printing?

FFF/FDM: Yes FDM/FFF runs by melting a filament and letting it cool again. As soon as the printed parts are cooled down to below 50°C (which is rather quick) handling them is safe. There's no chemical ...
Trish's user avatar
  • 22.2k
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 ...
hilo90mhz's user avatar
  • 111
7 votes

PETG layer adhesion

While 0scar was right that cooling fan hurts layer adhesion, I've continued to have problems with PETG even with no fan, regardless of temperature. I went looking for advice on the topic, and found a ...
R.. GitHub STOP HELPING ICE's user avatar
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 ...
0scar's user avatar
  • 36.2k
7 votes

Good filament/s for heat resistance in cars

ABS, or preferably ASA which is "a better ABS", is probably your main option. ASA holds up better under UV/sunlight and is easier to print (less warping). Like ABS it should be printed with ...
R.. GitHub STOP HELPING ICE's user avatar
7 votes

Improving durability of a printed propeller

You need WAY more infill or make it solid. Normal props like this are 100% solid for a reason. To add to that, in my experience with 3D printing the the infill percent is only part of the story for ...
Kezat's user avatar
  • 363
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 ...
0scar's user avatar
  • 36.2k
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-...
Ryan Carlyle's user avatar
  • 6,616
6 votes

Can I print in wax?

Yes, with the proper equipment. Printing wax filament (at 51 seconds): https://youtu.be/tibkVZB_n9c?t=51s There are also options for melting wax, filling a heated reservoir head, and printing with ...
Davo's user avatar
  • 2,440
6 votes

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

Here is a great answer to the underlying physics of resonance: "A object rings because it has acquired energy in a way that it resonates - it vibrates at a frequency and with enough energy to ...
markshancock's user avatar
  • 2,490
6 votes
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PLA continuous operative temperature

EvilTeach's answer is correct, ABS is a more reliable plastic for any kind of work which may get above what feels "hot to the touch." Just to elaborate on the why: the property you're looking for in ...
eyashin's user avatar
  • 76
6 votes

I found a filament that can be used for really precise FDM printing, Who could I hire to create a custom nozzle for it

You won't need specialized nozzles, you understand the material wrong: The benefit the properties of this material grant is not super fine prints (which you can get with small nozzles like 0.1 mm ...
Trish's user avatar
  • 22.2k

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