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24 votes
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What are the parts that make up a hotend, and what do they do?

This varies by hotend design. The following is a list of components which you might find in a typical hotend, but note that different designs may integrate these components to some extent. For ...
Tom van der Zanden's user avatar
19 votes
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Which is the difference between MK6 and MK8 and even MK10?

All credits for the following go to user "vermon" who posted in this thread. The following is a heavily amended version from his longer answer there. Makerbot did start its hotend series using MK as ...
mac's user avatar
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16 votes
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What are the advantages and disadvantages of an all-metal hot end compared to one with a PTFE heat break?

This is a good question to make a comparison table. All-metal hotends Vs. PTFE liner hotends. All metal: Works well for high (+250ºC) temperatures filaments like nylon or PC. No need to replace the ...
JorgePerez's user avatar
13 votes
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What is the best length of the melting zone in the hotend?

Short melting zone melts material in small amounts which is suitable for thin layers with small nozzles. In opposite, long melting zone can heat a big amount of filament which is needed for fast ...
amra's user avatar
  • 1,911
11 votes
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What is stopping us from mixing 3D filament colors in an Extruder?

I just started with google and phrase "3d printing color mixing" and on the first place (in fact first two were valueless adverts) I got this Instructables - DIY Full Color Mixing 3D Printer. How it ...
darth pixel's user avatar
  • 3,456
10 votes
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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
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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
  • 21.9k
9 votes

Efficient and easy way to thermally insulate the heat block of the hotend?

The "quick and dirty" approach is to just slap a bunch of Kapton tape on there. The more the better! (Until you need to dismantle for maintenance, anyway.) I find pre-cut ceramic tape + kapton tape "...
Ryan Carlyle's user avatar
  • 6,586
9 votes

What are the advantages and disadvantages of an all-metal hot end compared to one with a PTFE heat break?

Yeah, Yeah... Old topic I know, but still an ongoing topic for new and old hands alike. "All metal or PTFE lined" along with "Bowden or Direct drive" Those are the questions! This is a very unusual ...
Mark Wood's user avatar
8 votes

Efficient and easy way to thermally insulate the heat block of the hotend?

I ask myself why people hassle with kapton tape when it is so easy to use teflon sealing tape to isulate the hotend. This tape is slightly foamed to allow better sealing when used for sealing "tube ...
Rolf's user avatar
  • 81
8 votes

What are the advantages and disadvantages of an all-metal hot end compared to one with a PTFE heat break?

In general, metal extruder without PTFE feeding is useful when printing with materials that require high temperature to melt: 300oC and above. Polycarbonate with recommended printing temperature at ...
Mikhail Z's user avatar
  • 878
8 votes

What is stopping us from mixing 3D filament colors in an Extruder?

The three in one print head is the closest to your concept of gradient printing and does some nice transitions. But does not meet your color mixing. Which I assume your looking for there is ...
spicetraders's user avatar
8 votes
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What is the power consumption of the heatbed and hotend?

I have a Kill-A-Watt meter so I got a pretty good measurement for you with my Anet A6. Like Petar said each model is different but this should give you a idea. When heating both the nozzle and heat ...
Ljk2000's user avatar
  • 1,253
8 votes
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Would a really short melt-zone be beneficial

There is a trade-off between the length of the melt zone and the speed at which you can print. The filament itself is somewhat of an insulator, so as the outside of the filament is heated up by being ...
Tom van der Zanden'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
  • 911
8 votes

Why have heater blocks on hotends?

Let's look at the elements and what they do: The Heater Cartridge (blue) is the device that converts electric to thermal energy to melt the plastic. 30 and 40 W are common. The Thermosensor (red) is ...
Trish's user avatar
  • 21.9k
7 votes
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Is it necessary to have both hot ends on a dual extruder printer at the same height?

I have a dual extruder Replicator 1 and having the nozzles at the same height is a must and albeit a bit of a struggle otherwise. At one point, I had to disassemble my extruder head and the nozzles ...
tbm0115's user avatar
  • 6,284
7 votes
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Prusa i3 hotend not getting to the temperature that I want (180 to 230 celsius)

Usually, this kind of problem is due to an issue with the control loop of the temperature. You can try to do PID Tuning by running the command M303 E0 S200 C8. This ...
Tom van der Zanden's user avatar
7 votes
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Why don't 3D printer heads use ceramic inner walls?

It can be done cheaply, as two different users have proven, see A practical 10 Cents Ceramic tube hotend, and; Hotend with ceramic parts. However, as Paulster2 states in his answer, there are some ...
Greenonline's user avatar
  • 6,308
7 votes
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What type of plug is this?

As 0scar noted, this looks suspiciously like a JST connector, but the left one is not a JST RCY connector and it is neither one of the common JST PH nor JST XH, JST manufacturer pages show. In fact, ...
Trish's user avatar
  • 21.9k
7 votes
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When do you need a silicone sock? What problem does it solve?

A silicone sock helps keep the heat from the hot end from radiating down onto the freshly-printed parts, which have a blower fan cooling them. The sock also helps keep the hot end hot and away from ...
Criggie's user avatar
  • 952
7 votes

How do I remove filament from the hotend of a direct-drive printer?

Ok, so I finally figured out a way to get it out: I heated the hotend to the melting temp. of the filament, and then used another piece of filament to push it through. Just make sure that the other ...
TheTridentGuy supports Ukraine's user avatar
6 votes

What is stopping us from mixing 3D filament colors in an Extruder?

A Kickstarter campaign just finished for a full color 3D FDM printer, the RoVa4D Full Color Blender 3D Printer. It used CYMK printing and includes black and white filament for 5 color filament feeds, ...
JKEngineer's user avatar
6 votes
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Blow vs suck air over hotend's heatsink

Getting hot air from the radiator is definitely wrong idea because of few reasons: hot air can damage your fan (as they are usually not heatproof). Cold air cools the fan cold air is denser so fan ...
darth pixel's user avatar
  • 3,456
6 votes
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Hot end jamming very quickly

You are suffering from what is called "heat creep". Molten filament is creeping up the heat break and into the bowden tube, where it is causing a jam. You need to install a proper radiator block that ...
Mick's user avatar
  • 3,160
6 votes

Hot end temperature varies during print

There could be a number of reasons for that behaviour: Please check following items: part blower/fan cools down the nozzle - stop the fan material is extruded at high speed and takes the heat loose ...
profesor79's user avatar
  • 1,972
6 votes
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What parts are suitable replacements for an Ender 3 Pro?

The Ender 3 takes an M6 thread (metric 6 mm diameter). Measurement of stock nozzle shown. Most sellers will list compatible printers Ender 2, Ender 3, Ender 4, CR-10, CR-10S, CR-10 Mini, CR-10-...
iCollect.it Ltd's user avatar
6 votes

Clogging due to heat creep: buy new cooler or new hotend?

To fight heat creep, you must understand why this is happening. Heat creeps up the hotend assembly (into the cold end) as a result of incorrect settings or hardware setup causing the filament to ...
0scar's user avatar
  • 35.5k
6 votes

Needle Hotend for nonplanar printing

A conventional hot end needs only to be obstruction-free to the desired printing height on two adjacent sides to achieve what you want. The only other requirement is to be able to tell your slicer in ...
Mick's user avatar
  • 3,160
6 votes
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How do I remove filament from the hotend of a direct-drive printer?

Cold Pull The technic is nigh the same as for a bowden machine: Do NOT cut the filament! First heat the hotend to your filament's print temperature or about 20 °C lower Then pull at the filament, ...
Trish's user avatar
  • 21.9k

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