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33 votes
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What glues for bonding printed PLA to injection-molded plastic?

PLA is a nice one, and gluing has been a topic on some of our most favorite maker's channels. For example Stefan from CNC kitchen (this video) and Joel the 3DPrinting Nerd (this video). Also, in 2022, ...
Trish's user avatar
  • 22.2k
29 votes
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Can aged PLA be refurbished?

The easiest way to freshen up filament is hot air, although there are other options. There is an optimal melt processing moisture level for every plastic, typically in the range of 0.1-0.2% water ...
Ryan Carlyle's user avatar
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23 votes
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Why keep the bed heated after initial layer(s) with PLA (or PETG)?

There are three reasons (I can think of): A large problem you'd face with allowing the bed to cool after first layer is you stand the chance of losing adhesion after it cools. When you heat the bed, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
19 votes
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Can you put PLA parts in your car (in the sun)?

No, PLA cannot be used in cars standing in the sun. Temperatures can locally get over 50 °C (122 °F). I have printed sun visor hinge pins from PLA for a car (not exposed to direct sunlight either), ...
0scar's user avatar
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18 votes
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Is PLA filament conductive?

Normal PLA is non-conductive. You can take an $\Omega$-meter to a test part if you're really concerned somehow you have some PLA that is conductive. There is a caveat that your color may include metal ...
Barron B.'s user avatar
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17 votes
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What to do with failed/unwanted 3D prints?

The "obvious" answer is re-grinding the prints and making more filament. Unfortunately, this isn't yet a very economical or simple operation. A decent filament extruder capable of holding acceptable ...
Ryan Carlyle's user avatar
  • 6,616
17 votes

Serious safety concerns with living in same room as PLA 3D Printer?

You are probably pretty safe printing PLA Regarding emissions, the following recent report, Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-...
markshancock's user avatar
  • 2,490
15 votes
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Does the layer thickness have any effect of the strength of the 3D printed object?

3D Matter has published an excellent article on the subject. They find that thicker layers result in a stronger part, with 0.3mm layers giving a part that is around 24% stronger than the same part ...
Tom van der Zanden's user avatar
15 votes
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What is PLA+? How is it different from PLA?

Disclaimer: I am not affiliated with any linked brand or company, I just link to them for reference of the suggested print settings. What is PLA? PLA is, by its definition PolyLacticAcid, a polymer of ...
Trish's user avatar
  • 22.2k
14 votes

PLA use outdoors?

I printed a handle for a rather big rolling door in natural PLA (From Fabberparts) - no UV protection. It's on the weather side of the house and is exposed to direct sun half the day. And after three ...
Crono's user avatar
  • 141
14 votes
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Is there a way to save a multi part print if one fails?

If you use the OctoPrint print manager, you can exclude regions to be printed using the Exclude Region plugin. The description states that it can be used to rescue partially-failed prints: The intent ...
Mick's user avatar
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13 votes

Is PLA filament conductive?

PLA itself falls in the category of non-conductors, with a resistivity ($\rho=R\frac A l=\frac 1 \sigma$) in the order of $10^{16}\ \Omega \text m$ (see here), similar to other plastics. Following ...
pasaba por aqui's user avatar
13 votes
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Serious safety concerns with living in same room as PLA 3D Printer?

Fire is the most obvious risk - firmware can now detect some of the more obvious failure modes such as a detached thermistor, but loose or failing connections can still overheat. A smoke alarm is a ...
Sean Houlihane's user avatar
13 votes
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How to tell if PLA temp is too hot/cold

Too Hot If you're printing too hot (with any filament, not just PLA) you're going to see stringing and blobs/oozing because the material is getting runny and exiting the nozzle in an uncontrolled ...
Rykara's user avatar
  • 465
13 votes
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A vertical scar on the print surface, what is the name of this problem?

This is the Z-seam, or just "seam". It's a consequence of the fact that the extrusion of each layer has to start and stop at some point rather than being a continuous path for the whole ...
R.. GitHub STOP HELPING ICE's user avatar
11 votes

How to recycle filament material from printed parts?

If you're more interested in the recycling and reuse aspect than the re-print aspect, you could melt all the scrap filament onto a cookie sheet or into a bar (like in a bread ban). You could then ...
YetAnotherRandomUser's user avatar
11 votes
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Why doesn't PLA stick to heated bed?

I think you may have used the wrong substance to clean your bed. Try using Isopropyl Alcohol (IPA). You may have left some residue behind from the soap, which is now interfering with adhesion. When ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
10 votes
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Why does my PLA filament form a spiral shape and clog my extruder?

The shape you get is quite easy to explain. It's the shape of the lowest energy possible in your situation. Simple but it doesn't explain the issue... or does it? It does. The filament cannot be put ...
darth pixel's user avatar
  • 3,476
10 votes

What to do with failed/unwanted 3D prints?

It will be very difficult to find a recycling facility that will accept your 3D prints, because they're mainly set up to handle packaging material (which constitutes the vast majority of plastic waste)...
Tom van der Zanden's user avatar
10 votes

Can you put PLA parts in your car (in the sun)?

If you put PLA parts in a sealed plastic bag (or two to keep it dry) and simmer in water (212 °F or 100 °C), the part "anneals". The time taken varies with the part shape, but for ...
OyaMist's user avatar
  • 469
10 votes
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Heatercartridge bolt stuck

Don't Panic! First of all, a printhead caked in PLA is usually not a death sentence, it is often a temporary setback. Let's start in steps! Step 1: remove the extruder We want to work on the hotend, ...
Trish's user avatar
  • 22.2k
9 votes

Could nail polish damage pure PLA?

This is an ugly question, and an ugly answer. Nail polish doesn't come with an ingredient list. Nor are there MSDS's available to refer to what solvents are in it. So it's "unknown 1" Most every ...
joshConway's user avatar
9 votes

Getting PLA to stick to a cold bed

Most of the same reccomendations that apply for adhesion to a hot bed apply for a cold one. The first ones to come to mind: really dial in the nozzle height make the first layer taller than the rest ...
mac's user avatar
  • 4,725
9 votes

What causes ripples on part of first layer?

First layer rippling is usually caused by a too low of a first layer height (for the amount of extruded filament). Are you sure that: Your bed is leveled as good as possible, and the initial height ...
0scar's user avatar
  • 36.2k
8 votes

How is PLA different from ABS material?

The problem is that it's almost impossible to answer the PLA/ABS question just by looking at the material characteristics as it is so dependent on the application and even the specific object you're ...
FilamentGuy's user avatar
8 votes

Any fix for PLA prints getting more brittle over time?

PLA absorbs moisture, so keeping the filament dry is a key factor. Aside from that, PLA is naturally more brittle than other plastics like ABS and Nylon Sorry, tried to find a graph to prove it, but ...
tbm0115's user avatar
  • 6,324
8 votes
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Irregular 3D printed part

Your print isn't cooling fast enough. With small, thin prints like this, PLA needs a fair bit of airflow to solidify before the next layer goes down. Your printer doesn't appear to have a proper print-...
Ryan Carlyle's user avatar
  • 6,616
8 votes
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Why 3d print has an ugly surface?

This appears to be the result of your hot end (nozzle) temperature being slightly too high. I'd recommend lowering your nozzle temperature by a few degrees and retrying the print. If the quality ...
Diesel's user avatar
  • 1,905
8 votes

Uses for PLA scraps

Here is a great article on the subject, How to make your own filament by recycling old 3D prints | Part 1. At $20/kg for new material, it is going to be hard for recycling to break even; but, if the ...
markshancock's user avatar
  • 2,490
8 votes

Using the end of a spool

Weld the fragment to the beginning of a new spool and use it that way. Most are made from metal so they aren't that easy to make at home. Here is another answer that lists other methods to weld ...
tjb1's user avatar
  • 2,110

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