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The 2024 Developer Survey results are live! See the results
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 ...
Trish's user avatar
  • 22.3k
23 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 ...
0scar's user avatar
  • 36.5k
22 votes
Accepted

How do I 3D-print fair dice?

This is going to become a 3-step answer, as 3D Printing uses 3 different steps: Design, Slicing & Material choice before I elaborate alternate ways to some fair dice. Yet, we start with the ...
Trish's user avatar
  • 22.3k
17 votes
Accepted

First 3 mm prints poorly, then fine after that

After much trial and error, I think I finally figured out the solution. Even though I could get better prints by tweaking with the temperatures, I could never totally eliminate the problem. The ...
Steve In CO's user avatar
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
Accepted

Differences between moving build plate vs. extruder

Without going into too much detail, since this is a very exhaustive topic, I'll write some pro's of each down from the top of my head: Cartesian XZ hotend, Y bed (eg. Prusa Mendel): easy to build (...
kamuro's user avatar
  • 2,942
13 votes
Accepted

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
Accepted

Why turning off model cooling for first layer?

Filament expands as it gets hot. Cooling the filament will make it shrink, so cooling the filament deposited on the bed can lead to adhesion problems and warping of your products. This is exactly the ...
0scar's user avatar
  • 36.5k
11 votes
Accepted

Print came out like a wafer

The phenomenon you experience is called under-extrusion. Under-extrusion is the effect of extruding lesser filament than required for the print. The result of under-extrusion (depending on the amount ...
0scar's user avatar
  • 36.5k
10 votes
Accepted

How to choose an extrusion temperature?

Printing temperature basics Manufacturers generally specify a somewhat wide range of printing temperatures, and what temperature you should actually need can only be determined by trial and error: ...
Tom van der Zanden's user avatar
10 votes
Accepted

I am experiencing some severe under extrusion

Assuming your filament dimension settings are correct and your extruder is correctly calibrated... Your extruder temperature may be too low. While 184C can be hot enough, it is very near the bottom ...
Chris Thompson's user avatar
10 votes
Accepted

Why is the bottom of my part not smooth

Your nozzle is too far from your bed. The first layer isn't squished down sufficiently, resulting in these gaps. If your first layer looks like this, you should cancel your print and adjust the bed. ...
Tom van der Zanden's user avatar
10 votes
Accepted

What causes "ghosting"?

Ghosting is an artefact in the print due to the vibrations in the printer that are induced by rapid changes of direction. It is important not to confuse them with inherent vibrations in the printer ...
mac's user avatar
  • 4,735
10 votes
Accepted

Rule of thumb for small type

I've had better luck with fonts that are heavier, usually sans-serif, and usually bold-face. All-caps can help, too, if it makes sense at all for the text. Impact is one widely-available example, ...
Joel Coehoorn's user avatar
10 votes
Accepted

Bed surface stability vs head movement efficiency question

The second placement is a better choice from an overall standpoint. In the vertical placement, adhesion is going to be more critical, although Prusa printers have good bonding for PLA and ABS, from my ...
fred_dot_u's user avatar
  • 11.9k
9 votes
Accepted

How to utilize/calibrate print fans for PLA?

Everybody's combination of fan hardware and print settings is different. Unless someone else has the exact same printer and slicer profiles as you, there's no way to really say anything like "use X% ...
Ryan Carlyle's user avatar
  • 6,616
9 votes

What is retract speed & length?

Retraction is the reversal of the direction of the filament and is generally used when moving from one non-contiguous point of the print to another, in order to prevent stringing and oozing of the ...
Greenonline's user avatar
  • 6,573
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
  • 914
9 votes
Accepted

Relation between layer height and bond strength

My3dmatter.com performed a series of tests with PLA, using "a universal testing machine". They conclude: Layer height influences the strength of a printed part when it becomes thin. A printed ...
typo's user avatar
  • 936
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
  • 36.5k
9 votes

First 3 mm prints poorly, then fine after that

I had the exact same problem as you. And after trying all of your ideas (Thanks so much for the amound of information!!!), I discovered that in my case, the problem was actually the printer skipping a ...
Aphyrus's user avatar
  • 91
9 votes

Infill not reaching perimeter

This has nothing to do with the infill overlap, the image you've added looks as if the issue is related to non-bonding perimeters (it looks as if it is in between the 2nd and the 3rd perimeter), hence ...
0scar's user avatar
  • 36.5k
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
Accepted

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

What causes bubbles in extruded filament?

In my experience, bubbles like this are caused by the filament absorbing moisture, which then cooks out at the high printing temperatures. See: http://reprap.org/wiki/...
Davo's user avatar
  • 2,440
8 votes
Accepted

What causes bubbles in extruded filament?

Oh yeah, that's simple. You are printing too hot and are literally boiling the plastic. Else you have water. However if it was water you would hear Crackling as it printed. If it is too hot you will ...
StarWind0's user avatar
  • 3,113
8 votes
Accepted

Is there any reason *not* to use a steel nozzle for printing all materials?

Thermal conductivity of brass is approximately twice as better than steel (not stainless). Given that the size of nozzle is relatively small, it should be able to transfer enough heat for a medium-...
Mikhail Z's user avatar
  • 888
8 votes

How can I have a large 3D printed object?

As Trish states, a print service would appear to be your best bet. Building a printer large enough may work out costing more than the print service, especially if it is only for one print of a proof ...
Greenonline's user avatar
  • 6,573
8 votes
Accepted

Hemispherical Bowl : how is it possible?

There are several factors playing together. For example orientation, printer & slicer settings and more. Reminder First of all, not all overhangs of greater than 45° need support. Many printers ...
Trish's user avatar
  • 22.3k
7 votes

Printing an iPhone Case

Yes this is possible. For an FDM/FFF printer, you'll need to print with supports. I might also recommend printing in PLA to minimize the chance of warping during the print (from experience). It might ...
tbm0115's user avatar
  • 6,324

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